the production of egg and sperm cells is necessary for sexual reproduction because-
Answers
Sperm cells are produced in men's testicles and egg cells are produced in women's ovaries. Sex cells are different from other cells in one special way: Putting simply, they only have one half of the total amount of human genetic information
The egg and sperm cells are produced by Meiosis, which is a special type of cell division, where the cells only have half the number of chromosomes, one from each pair. When the process of Meiosis is complete, 4 cells are formed = eggs or sperm.
When there is the egg production so it increase the no of chromosomes where the gametes should combined.
What are chromosomes?
A chromosome refer to the long DNA molecule where it contain the genetic material with respect to the organism.
Mainly eukaryotic chromosomes involved the packaging proteins that we called as the histones that should be aided by the chaperone proteins.
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Daily Question 10/5
1. Tell the functions of these cell parts:
a. Plasma (cell) membrane
b. Nucleus
c. Nucleolus
Answers
Answer:
a.
Explanation:
Which describes Aristotle's and Ptolemy's models of the solar system? Select the two correct answers.
A. Sun at center
B. geocentric
C. circular motions of planets
D. elliptical motions of planets
Answers
Answer: B. geocentric and
C. circular motions of planets
Explanation:
Aristotle's model: He thought that earth was center universe. And this universe made up only four elements.
Ptolemy's model: He thought that earth was center of universe and all celestial objects including sun, planets and moon were orbiting the around the earth. And earth did not move at all.
Aristotle's and Ptolemy's models of the solar system suggest the geocentric and circular motions of planets.
Ptolemy model of the solar system was a geocentric model. Ptolemy thought that the universe was a set of nested spheres surrounding the Earth.
Aristotle's model shows the planets moving around the Earth in an orderly manner, in uniform circular motion, neither speeding up nor slowing down.
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7th grade science….
I need help
Answers
D: m(mass)/v(volume)
20 points Complete the following sentence. In certain regions, monk seals overturn rocks to catch prey underneath. But nearby sharks often steal the monk seals' catch. This represents a _________ relationship between the seals and the sharks. commensalistic competitive mutualistic parasitic
Answers
Explanation:
Commensialism – where one species benefits while the other is unaffected.
Mutualism – both species benefit.
Parasitism – one species benefits while one is harmed.
Competition – neither benefits.
Predation – one species benefits while the other dies, and
Neutralism – both species unaffected.
D
Question 1
A variable is something that can be changed in an experiment. Look on the SIMULATION pane.
What are the three variables you can change in your laboratory?
Predict: Which of these variables do you think will have the greatest effect on the aliens? Why?
Get the Gizmo ready:
.
Click Reset.
Select the BAR CHART tab.
Turn on Show numerical values.
Observe: Change the Light to 0 hours/day, the Water to 1 drops/hr, and the to 0 °C. Click Play, and
observe the aliens until the numbers are stable. Click Pause.
1. How many of each type of alien are there now?
.
O Thin: 50 Medium: 25 Thick: 25
O Thin: 20 Medium: 80 Thick: 0
15 pts
O Thin: 0 Medium: 80 Thick: 20
Thin: 2 Medium: 8 Thick: 90
Answers
The variable with the greatest effect on the aliens is the temperature. When the temperature is set to 0 °C, all of the thin aliens die off and the medium aliens thrive, while the thick aliens remain unchanged.
What is temperature?Temperature is a measure of the thermal energy of a system, which can be expressed in terms of the average kinetic energy of the atoms or molecules in a system. Temperature is closely related to the concept of heat, which is a measure of the total thermal energy of a system. Temperature is a physical quantity that is typically measured with a thermometer, and is expressed in units such as degrees Celsius (°C), degrees Fahrenheit (°F), or Kelvin (K). Temperature is an important factor in many scientific and engineering processes, and is often used to indicate the level of activity or reaction within a system. Temperature can also be used to indicate the rate of diffusion of a particle or substance, and has been used to measure the speed at which a particular process is occurring.
This demonstrates the effect temperature has on the different types of aliens, as the thin aliens are more sensitive to changes in temperature than the medium and thick aliens.
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Give an example of carbon atoms getting into the geosphere and one for the atmosphere:
Answers
Answer:1) Carbon moves from atmosphere to hydrosphere and biosphere in the process of photosynthesis and to lithosphere by deposition of dead bodies while from hydrosphere and biosphere, carbon can be move in the process of respiration by animals.
2) During respiration process which takes place in plants in which carbondioxide is released and by eating carbon containing food by animals. By decomposing the food, carbon is releases in the form of carbondioxide.
3) Carbon can be used by the marine plants in the process of photosynthesis and during the process of diffusion, carbon is also dissolve in water bodies.
4) When the plants and animals die, the carbon which is present inside their body is buried in the soil present at the bottom of the ocean and the shells and corels of some animals also contain carbon which is soon be the part of the lithosphere when they die.
5) After the decomposition of seashell, carbondioxide is produced because shells are made up of calcium carbonate.
Explanation:
Define the term genes (simple)
Answers
Answer:
Gene is the basic physical and functional unit of heredity.
How is the Calvin Cycle different from the light dependent reactions?
A. It requires light
B. It takes place in chloroplasts
C. It takes place in the Stroma
D. It takes place in the thylakoid membrane
Answers
Which mineral has the biggest role on the growth of a plant…. Nitrogen or magnesium?
Answers
Use the B for the dominant allele and a b for the recessive allele to answer the questions about the pedigree below. Fill in the answers to 1-8 in the short answer section space given below this question.
Answers
Answer:
Generation I
1. bb
2. BB
Generation II
1. Bb
2. Bb
3. Bb
4. Bb
Generation III
1. bb
2. BB
The chemical equation shown represents photosynthesis.
Carbon dioxide plus A plus light with a right-pointing arrow towards B plus oxygen. The arrow has an x above it.
What is the role of substance A in photosynthesis?
A. It stores chemical energy for plants and animals.
B. It traps light energy and converts it into chemical energy.
C. It combines with carbon dioxide and light to form glucose.
D. It combines with carbon dioxide and light to form hydrogen.
Answers
Answer:
The Equation of Photosynthesis is
6CO2 + 6H20 + Light=== C6H12O6 + 6O2
"A" Must be Water
It combines with Carbon dioxide and light to form GLUCOSE and oxygen
So
Option C✅
Answer:
option C
Explanation:
When a mass of hydrogen has enough density, it begins to fuse the hydrogen atoms together. This fusion process creates large amounts of heat and light.
When a mass of hydrogen begins the fusion process, it is classified as a —
star
nebula
galaxy
planet
Answers
Answer:
star
Explanation:
a star forms with hydrogen
When a mass of hydrogen begins the fusion process, it is classified as a star. The correct option is A.
What is a star?From the moment the first gas cloud begins to compress to the time the star is formed and begins to shine like the Sun, the process of star creation takes roughly one million years.
When a quantity of hydrogen is dense enough, the hydrogen atoms start to fuse together. It also produces light and heat. A portion of the hydrogen's mass is transformed into energy during the process.
Deuterium and tritium combine to form an atom of helium in the simplest fusion reaction. Fast particle density, close particle closeness, and a high rate of speed are three requirements for nuclear fusion.
A buildup of gas and dust falls under the influence of gravity to generate stars.
Therefore, the correct option is A. star.
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What is not classified as an organism
Answers
All organisms can be classified, Even organisms that are extinct can be classified.
Answer:
tree
Explanation:
because it may be a plant but its still not bond with plants
How does modification of stem occur write with two examples
Answers
The modification of the stem takes place through the development of various tissues, including the primary and secondary growth of the stem. In general, the stem's primary growth occurs at the tip, which contains the apical meristem, a specialized tissue that produces cells for growth. Meanwhile, the secondary growth occurs in the lateral direction, and it involves the formation of secondary tissues like cork cambium and vascular cambium.
Cork Cambium: Cork cambium forms in the outer layers of stems and roots of many plants. The cells produced by the cork cambium differentiate into cork cells, which form a protective layer called bark. Cork cells are typically dead, and their cell walls contain a waxy substance known as suberin. Cork cambium helps protect the stem from insects, temperature changes, and mechanical damage. Examples include the bark of trees, potatoes, and sweet potatoes.
Vascular Cambium: Vascular cambium forms a cylinder of cells that extends along the length of the stem and roots of many plants. The cells produced by the vascular cambium differentiate into xylem and phloem cells, which transport water and nutrients throughout the plant. Xylem is responsible for the transport of water and minerals from roots to the leaves, while phloem is responsible for the transport of food from the leaves to other parts of the plant. Examples of plants that have vascular cambium include trees, shrubs, and many other woody plants.
In conclusion, the modification of the stem occurs through the development of various tissues, including the primary and secondary growth of the stem. Examples of the secondary growth are cork cambium and vascular cambium that form in the outer layers of stems and roots of many plants. Cork cambium forms a protective layer called bark while vascular cambium forms a cylinder of cells that extends along the length of the stem and roots of many plants.
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4. According to the data in Tables, which planet in the solar system has the greatest
Answers
what table?
Explanation:
complete the sentences from George Bernard Shaw's the doctors dilemma with word
s that are punctuated and spelled correctly this of course does amount to a sort of working of rule of thumb( options: conscience:
conscience.
conscience
conscience; ) but it means that you'll do anything good or ( options: bad:
bad,
bad;
bad. ) provided you get enough people to keep you accountants by doing it also it is the sort of conscience that makes it possible to keep order on a pirate (options: ship:
ship;
ship
ship. ) or in a troop of bringings it may be said that in the last analysis there is no other sort of Honor or conscience in existence that the ascent of the majority is only sanction known to ethics
Answers
Answer:
The correct answers are:
1. D : conscience;
2. B : bad,
3. D : ship,
Explanation:
The first answer requires a semicolon because we have two separate sentences, this is, two independent clauses, and in this case, we use the semicolon to connect them.
The second answer requires a comma as we have an appositive that does not provide essential information, so we separate it with a coma to designate additional information and maintain the structure of the sentence complete and clear.
The third answer requires a comma before the conjunction or because the rest of the sentence means the same as what precedes it. In this case, we use a comma as a sign of equivalence, to clarify that pirate ship is equivalent to a troop of brigands.
this is the correct answer
what type of glial cells myelinate axons in the brain and spinal cord?
Answers
Oligodendrocytes are the glial cells that myelinate axons in the brain and spinal cord.
Oligodendrocytes wrap their cell membranes around axons, forming a layer of insulation that speeds up the transmission of nerve impulses.
Myelin sheaths are made up of multiple layers of oligodendrocyte plasma membrane, with the cytoplasm squeezed out in between. This results in a very thin, tightly packed sheath that acts as an electrical insulator.
The myelin sheath increases the speed of nerve conduction by up to 100 times, allowing messages to travel much more quickly along axons.
This is essential for the efficient communication between neurons, and is necessary for many cognitive functions, including learning, memory, and movement.
Oligodendrocytes are found throughout the central nervous system, but they are most abundant in the white matter, which is made up of bundles of myelinated axons.
The white matter is responsible for carrying information between different parts of the brain and spinal cord.
Myelin sheaths are essential for the proper functioning of the central nervous system, and damage to these sheaths can lead to a variety of neurological disorders, including multiple sclerosis.
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This is the scale used to describe how acidic or basic a solution is. This affects the enzymes within living systems.This is the contamination of an environment beyond natural correction.An organism facing extinction through destruction of habitat; theprocess may threaten the survival, abundance or evolutionarydevelopment of the species.This is the ceasing of the existence of any particular species.A pathway by which a chemical element or molecule moves throughboth biotic and abiotic compartments of an ecosystem.A process of land use change in which plants and animals whichpreviously used the site are displaced or destroyed. Generally this resultsin a reduction in biodiversity,A theory of overall increase in world near-surface air and oceantemperatures which may be caused by additional heat being trapped bygreenhouse gases. The increase of temperatures would cause significantchanges in rainfall patterns, a rise in sea level, and a wide range ofimpacts on plants, wildlife, and humansFind the correct vocabulary word for each definition.
Answers
The words for the definitions are the following:
1. Scale used to describe how acidic or basic a solution is: pH scale
2. Affects the enzymes within living systems: Temperature, pH and concentration can affect enzymes.
3. Contamination of the environment beyond natural correction: Pollution.
4. An organism facing extinction through destruction of habitat: endangered species.
5. The ceasing of the existence of any particular species: extintion.
6. A pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of an ecosystem: biogeochemical cycle.
7. A process of land use change in which plants and animals which previously used the site are displaced or destroyed: habitat loss.
8. A theory of overall increase in world near-surface air and ocean temperatures: global warming.
9.The increase of temperature would cause significant changes in rainfall patterns, a rise in sea level and a wide range of impacts: climat change.
When a healthy individual takes a glucose tolerance test, the blood glucose level will spike but then return to normal. In a patient with type 1 diabetes, the blood glucose level will spike dramatically and remain high due to inadequate insulin release. In a patient with type 2 diabetes, the blood glucose level will also spike dramatically and remain high due to a reduced sensitivity to insulin. In Jessie's case, her blood glucose levels were normal throughout the glucose tolerance test, except that she was more hypoglycemic than normal at the beginning and end of the test.
Select all the hypotheses that could explain Jessie's glucose tolerance test results.
a. Her glucagon levels are too low when she fasts.
b. Her glucagon levels are too high when she fasts.
c. Her glucose production during fasting is lower than normal due to a problem with gluconeogenesis in the liver.
d. Her tissues are taking in more glucose from the blood to compensate for inadequate ATP production, such as from β‑oxidation of fatty acids.
e. Her blood glucose levels are high, because she is diabetic.
Answers
Hypotheses that could explain Jessie's glucose tolerance test results are:
a. Her glucagon levels are too low when she fasts.
c. Her glucose production during fasting is lower than normal due to a problem with gluconeogenesis in the liver.
Her glucose tolerance test results showed that her blood glucose levels were normal throughout the test, except that she was more hypoglycemic than normal at the beginning and end of the test. This could be due to low levels of glucagon during fasting, which could result in lower blood glucose levels. Another possible explanation is that she may have a problem with gluconeogenesis in the liver, which could result in reduced glucose production during fasting, leading to hypoglycemia.
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Over the next 10 years, many of the UK’s nuclear power stations are expected to close.
Suggest how this may affect the future balance of sources of energy used for electricity production in the UK.
Answers
Answer:
Greatly affected.
Explanation:
This closing of nuclear power stations greatly affect the future balance of sources of energy used for electricity production in the UK because the burden of production comes on other sources such as production of electricity from fossil fuels, wind and solar radiation etc. If electricity is produced from fossil fuels so it leads to pollution of the environment whereas if the electricity is produced from wind and solar radiation, it is very costly but good for the environment.
TRPV4 is a gene in cats that encodes for calcium permeable ion channels. The Scottish Fold is a breed of cats that has a mutated dominant TRPV4 gene. Mutations to this dominant gene cause developmental issue in bones and cartilages. One copy of the mutated dominant gene causes the the signature "fold" in the ears of the Scottish Fold breed. Two copies of the dominant gene cause a condition known as osteochondrodysplasia (crippling effect) and causes significant issues to the tail, limbs, and paws of the cat. Imagine you are a part of the local government and have been tasked with creating a set of rules for breeders of Scottish Fold cats. 1) Determine all possible gene combinations and their resulting phenotypes. 2) Determine the acceptable genotypes that breeders can cross so that no cats will be born with osteochondrodysplasia.
Answers
Possible gene combinations and resulting phenotypes: FF (folded ears), Ff (folded ears), ff (normal ears).
Acceptable genotypes for breeders: Heterozygous Dominant (Ff) x Homozygous Recessive (ff) or Homozygous Recessive (ff) x Homozygous Recessive (ff).
To prevent cats from being born with osteochondrodysplasia, breeders should avoid crossing cats that have two copies of the dominant gene (FF or Ff) as this increases the risk of the condition. By selectively breeding heterozygous dominant cats (Ff) with homozygous recessive cats (ff), breeders can ensure that all offspring will have folded ears (a desirable trait) while avoiding the risk of osteochondrodysplasia. Alternatively, breeding two homozygous recessive cats (ff) will result in cats with normal ears and no risk of the condition. These guidelines prioritize the welfare and health of Scottish Fold cats.
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The early ___ believed that the universe was large rectangular box
A)Chinese
B)Asians
C)Egyptians
Answers
Answer:
the Egyptians believed that god was the holder of the universe and the Chinese believed something very similar so your best answer is asian
Explanation:
“The Egyptians ,for example believed the universe to be like a long rectangular box”
All organisms have a blank Habitat in which they live.
Answers
Answer:
natural
Explanation:
All organisms have a natural habitat in which they live
A nerve is a bundle of
Question 34 options:
A. neurotransmitters in the central nervous system.
B. glial cells in the brain.
C. axons in the peripheral nervous system.
D. cell bodies in the brain.
Answers
Answer:
the correct answer is C: the nerve is a bundle of axons in the peripheral nervous system
when replanting forested areas, lumber companies have greater success when the seedlings are:
Answers
Lumber companies have greater success when the seedlings used for replanting forested areas are carefully selected and genetically diverse.
This helps to ensure that the new trees will be more resilient to disease and environmental stressors. Additionally, the timing and location of planting can also impact success rates, as well as proper management practices such as irrigation and fertilization, When replanting forested areas, lumber companies have greater success when the seedlings are:
1. Selected based on their suitability to the local climate and soil conditions.
2. Properly spaced to allow for optimal growth and reduced competition.
3. Planted during the appropriate season for the species to ensure proper establishment.
4. Monitored and maintained to protect them from pests, diseases, and environmental stressors.
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Identify the type of cell division used when the organism or parts of the organism reproduces asexually.Illustrate and label the steps of this process.
Answers
The type of cell division used when an organism reproduces asexually is binary fission. Only unicellular organism can undergo asexual reproduction and that is through the process of binary fission. Binary fission is the separation of the body into two new bodies. The genetic material is being duplicated and further divides into two through cytokinesis. Each of the new organism will possess one copy of the DNA. Multicellular organisms can also use mitosis to reproduce asexually.
Hort 115 Soil Science Fertilizer Calculation Practice Worksheet 1. You purchase a complete fertilizer. What is the "fertilizer grade"? What is the "fertilizer analysis"? Why might you be more interested in the "analysis" than the "grade"? The fertizer 2. How many pounds of P Os are in a ton of Gro-Power Plus? 3. How many pounds of K O are in a ton of Scotts Organic Choice Lawn Food? 4. How many pounds of each nutrient (N.P.K) are in a ton of Scott's Organic Choice Lawn Food? 5. How Many pounds of each nutrient are in a ton of Gro-Power Plus? 6. How many pounds of each nutrient are in a ton of Osmocote? 7. Our lab soil test recommendation for grapes says to apply 12-12-12 fertilizer at 8 lbs of N per 1,000 sq feet on our vineyard. Let's say we only have Gro Power Plus, we don't have 12-12-12. How many pounds of Gro Power Plus must we apply to achieve the same recommended rate? 8. A 40 lb bag of Scotts Organic Choice costs $19.00. A 20 lb bag of Gro Power Plus costs $11.00. A 50 Ib bag of Osmocote costs $90.00. What is the price per pound of Nitrogen nutrient for each fertilizer?
Answers
1. Fertilizer Grade: Fertilizer grade refers to the three key nutrients present in the fertilizer; Nitrogen, Phosphorus and Potassium (N, P, and K). Fertilizer grade is generally written in a ratio format; for example, 16-4-8 indicates that the fertilizer has 16% nitrogen, 4% phosphorus, and 8% potassium.
Fertilizer Analysis: Fertilizer analysis refers to the percentage of nutrients present in the fertilizer. It is the nutrient content of a fertilizer as indicated by the amount of nitrogen (N), phosphorus (P), and potassium (K) that is contained in it.
2. Gro-Power Plus contains 5% P2O5 (Phosphorus). Therefore, in a ton of Gro-Power Plus, there are 1000 lbs x 0.05 = 50 lbs of P2O5.
3. Scott's Organic Choice Lawn Food contains 9% K2O (Potassium). Therefore, in a ton of Scott's Organic Choice Lawn Food, there are 1000 lbs x 0.09 = 90 lbs of K2O.
4. Scott's Organic Choice Lawn Food contains 9% N, 1% P, and 9% K. Therefore, in a ton of Scott's Organic Choice Lawn Food, there are 1000 lbs x 0.09 = 90 lbs of N, 1000 lbs x 0.01 = 10 lbs of P2O5, and 1000 lbs x 0.09 = 90 lbs of K2O.
5. Gro-Power Plus contains 5% N, 3% P2O5, and 8% K2O. Therefore, in a ton of Gro-Power Plus, there are 1000 lbs x 0.05 = 50 lbs of N, 1000 lbs x 0.03 = 30 lbs of P2O5, and 1000 lbs x 0.08 = 80 lbs of K2O.
6. Osmocote contains 14% N, 14% P2O5, and 14% K2O. Therefore, in a ton of Osmocote, there are 1000 lbs x 0.14 = 140 lbs of N, 1000 lbs x 0.14 = 140 lbs of P2O5, and 1000 lbs x 0.14 = 140 lbs of K2O.
7. If we assume Gro Power Plus is the only option, it contains 5% N. Therefore, we need 160 lbs of Gro-Power Plus per 1000 sq ft area (8/0.05).
8. For Scotts Organic Choice Lawn Food, the price per pound of nitrogen is (40 lbs x 0.09) / $19 = $0.189. For Gro-Power Plus, the price per pound of nitrogen is (20 lbs x 0.05) / $11 = $0.091.
For Osmocote, the price per pound of nitrogen is (50 lbs x 0.14) / $90 = $0.077.
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Acute epiglottitis used to be caused by: a. Staphylococcus aureus b. Streptococcus pyogenes c. Corynebacterium pseudoinfluenzae d. Haemophilus influenzae
Answers
Acute epiglottitis used to be caused by Haemophilus influenzae.
Acute epiglottitis is an infection and inflammation of the epiglottis, a flap of tissue at the base of the tongue that covers the entrance to the windpipe (trachea) during swallowing to prevent food or liquid from entering the airways. In the past, Haemophilus influenzae type B (Hib) was the most common cause of acute epiglottitis in children. However, with the introduction of the Hib vaccine, the incidence of epiglottitis caused by Haemophilus influenzae has significantly decreased. Other bacterial pathogens, such as Streptococcus pneumoniae and Streptococcus pyogenes, can also cause epiglottitis, but they are less common than Haemophilus influenzae. Staphylococcus aureus and Corynebacterium pseudoinfluenzae are not typically associated with acute epiglottitis.
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A patient was admitted to the ICU in December 2000 [...].
Answers
Ipenem is the MOST efficient. The provided data makes it abundantly evident that the patient develops the least resistance to this antibiotic. Ampicillin is the least reliable.
Ampicillin is used to treat bacterial infections of the sinuses, throat, lungs, reproductive organs, gastrointestinal tract, and urinary system. Another problem it is used to treat is meningitis, an infection of the membranes enclosing the brain and spinal cord. Amoxicillin and ampicillin have a lot in common. They belong to the same drug class and are structurally related to one another. Although they have slightly differing indications and dose, they have comparable adverse effects and medication interactions. Infections caused by a number of bacteria can be treated with ampicillin. It is an antibiotic similar to penicillin. It acts by preventing bacterial development.
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In silkworms,yellow cocoon (B) is dominat over white cocoon(b). If the mom is BB and the dad is bb, what are the chances they have offspring with yellow cocoons?
Answers
Answer:
100 %
Explanation:
Dominance is a genetic phenomenon where a gene variant or allele masks the effects of another allele (of the same gene) in heterozygous individuals. This last gene variant is referred to as the recessive allele. In this case, the silkworm mother can produce only one type of gamete carrying the dominant gene (B) form, while the silkworm father can produce only one type of gamete carrying the recessive gene (b) form. In consequence, from this cross, all offspring (100 %) will be heterozygous (Bb) and therefore they will express the dominant trait (i.e., yellow cocoon).