What is heredity?
(9 Points)
A. The passing of traits from parent to offspring
B. The passing of chromosomes from parent to offspring
C. Traits produced because of environmental influences
D. Alterations in the nucleotide sequence of genes
Answers
Answer:
A
Explanation:
Related Questions
1 point
2. Two main differences between mitosis and meiosis are
A. Mitosis creates body cells with 46 chromosomes each, and Meiosis creates sex
cells with 23 chromosomes each.
B. Meiosis creates body cells with 46 chromosomes each, and Mitosis creates sex
cells with 23 chromosomes each.
C. Mitosis - crossing over occurs, and matching pairs of chromosomes (homologous
pairs) separate
D. Meiosis, two new cells are produced, and they have the total number of
chromosomes (46).
Answers
Answer:
mitosis: 1.is cell division
2. daughter cells are identical to the mother cell in terms of the number of chromosomes
3. passes through several phases
meiosis
1. The zygote is the most concrete example of division
2. daughter cells are not the same as the mother cell in terms of the number of chromosomes
3. can be divided into more than two
Most biological macromolecules contains carbon. Which organic compound, used for stored chemical energy, contains carbon, hydrogen, oxygen, and will sometimes contain and phosphate group
A.) Lipid
B.) Carbohydrate
C.) Protein
D.) Starch
Answers
Explanation: I know because carbohydrates contain oxygen, hydrogen, phosphate, and nitrogen. That is what gives us energy!
Lipid is an organic compound that is used for stored chemical energy, contains carbon, hydrogen, and oxygen, and will sometimes contain a phosphate group. Thus, the correct option for this question is A.
What are Macromolecules?Macromolecules may be defined as types of molecules that are large, complex, and typically formed due to the association of two or more smaller units known as monomers with the help of intermolecular forces. Examples of macromolecules include proteins, carbohydrates, nucleic acids, lipids, etc.
Lipids are generally composed of carbon, oxygen, and hydrogen, as well as nitrogen, phosphorus, sulfur, and other elements. These macromolecules are utilized in order to store long-term energy. Carbohydrates are known to supply immediate energy to the body.
Therefore, the organic compound used for stored chemical energy contains carbon, hydrogen, and oxygen, and will sometimes contain the phosphate group known as lipids. Thus, the correct option for this question is A.
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How does an organisms life begin?
Answers
Answer:
Living organisms undergo growth and development. Every living organism begins life as a single cell.
Answer:
The life of an animal organism, obviously, begins at conception. But human life begins only at the moment that the animal has a mind. In some, very fast, developers this can happen before the age of one year; in a large majority of cases this happens between two and three years of age.
Explanation:
The earth is located _______ of the Milky Way galaxy.
Answers
Answer: The earth is located at the edge of the Milky Way galaxy.
Hope this helps!
A team of scientists altered the DNA of pseudomonas bacteria. The bacteria thus developed had the ability to eat up oil. What could be the likely impact of this biotechnology on the environment and the society?
Toxic gases would be released, causing large-scale pollution.
Damage to marine flora and fauna due to oil spills could be prevented.
The consumption of nonrenewable energy sources would be increased.
The process of oil exploration would become simpler and more economical.
Answers
The alteration of pseudomonas bacteria's DNA to enable them to consume oil could have both positive and negative impacts on the environment and society.
Firstly, the potential benefits include the ability to mitigate oil spills and minimize damage to marine flora and fauna. These genetically modified bacteria could be used in oil spill cleanup efforts, helping to break down and digest the spilled oil more effectively, thus reducing the environmental impact.
On the other hand, there are also potential risks associated with this biotechnology. If the modified bacteria were released into the environment unintentionally or without proper control, there could be adverse consequences. The uncontrolled spread of these bacteria could result in unintended pollution as they consume not only spilled oil but also other hydrocarbon sources, leading to the release of toxic gases and further environmental damage.
Moreover, the introduction of such bacteria could disrupt natural ecosystems, potentially affecting other microorganisms and organisms that depend on oil for survival. The long-term effects on the balance of ecosystems are uncertain and would require thorough evaluation before any large-scale implementation.
In terms of society, the development of these bacteria could have economic implications. The cleanup of oil spills could become more efficient and cost-effective, potentially reducing the financial burden on affected industries and governments. However, it is important to consider the potential risks and unintended consequences of relying solely on this biotechnology, as it may discourage the development of alternative, cleaner energy sources.
Overall, the impact of genetically modified pseudomonas bacteria with oil-consuming abilities on the environment and society would depend on how the technology is deployed, regulated, and monitored. It is crucial to carefully evaluate the potential risks and benefits to ensure responsible and sustainable implementation.
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The science disaster at mission middle school… I need the answers the answer should be a score
Answers
The Science Disaster at Mission Middle School is a written assignment designed to emphasize science lab safety standards and regulations. This exercise focuses on any and all safety restrictions/ precautions that you may implement in your scientific lab.
What are basic lab safety protocols?The Environment, health and safety practices that must be employed to ensure a save laboratory environment are:
With respect to Food and Drink:
First and foremost, eating or drinking in the lab increases your chance of exposure to harmful compounds.Food and drink can make a mess, raising the risk of infection and perhaps attracting pests.Eating or drinking in the lab can potentially be a source of distraction, resulting in a spill or a more serious incident.With respect to Personal Protective Equipment:
When working in the lab, long trousers and shoes that completely cover the top of the foot should be worn at all times.Lab coats protect your clothes and skin and should be worn at all times.Eye protection is provided by safety glasses or goggles, which must be worn at all times.Gloves shield your skin from potentially harmful substances. When you're finished with them, make sure to properly dispose of them.Other practices to abide by are:
Maintain good personal hygieneUse recommended storage containersEnsure that your work space and work tools are labelledRemain at alert about your environment and never work aloneUse and put away batteries properly.Learn more about laboratory protocols:
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Define the term dfiffusion
Answers
Answer:
Explanation:
Diffusion is a substance movement from a region of high concentration to low concentration
It is passive and spontaneous process..
A scientist has isolated a gene coding for the defensin protein found in spinach, which gives defense against microbial infections. The scientist inserts that gene into a virus.
Which step must the scientist then take to transfer the gene to orange trees to protect them from pathogens?
Answers
A scientist has isolated a gene coding for the defensing protein found in spinach, which gives defense against microbial infections.
The steps that must be taken by the scientist to transfer the gene to orange trees to protect them from pathogens is the modified virus must be introduced to the orange trees' cells.
What do you mean by Pathogens?Pathogens may be defined as those microorganisms which are capable of causing diseases in other organisms. When a gene of defensing protein is introduced into the virus, it also becomes protected against microbial infection. This modified virus is then injected into the genome of the orange tree which in result leads to highly tolerable to microbial infections. Therefore, the steps that must be taken by the scientist to transfer the gene to orange trees to protect them from pathogens is the modified virus must be introduced to the orange trees' cells.
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The endocrine system consists of __________ and many other organs.
10 points
neurons
glands
homeostasis
dendrites
Answers
Answer:
Answer for your question is B) glands
There are more primary producers than there are ...
A. primary consumers
B. secondary consumers
B. tertiary consumers
C. quaternary consumers
D. all of the above
Answers
Answer: the answer is A. primary consumers
PLEASE HELP :) Can someone please explain what primary production is? Also what does sink/source/flux/ and egestion mean? (Can an organism be a sink/source and flux at the same time or is an organism only supposed to be one or the other?
Answers
Answer:
It describes the rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem.
Sources are carbon emitters
sinks are carbon absorbers
The movement of any material from one place to another is called a flux
Egestion: The act of excreting unusable or undigested material from a cell
Explanation:
fluxes are flows of carbon between sources and sinks. A source may also be a sink.
from which part of the nervous system do cells that innervate neuromuscular junctions originate?
Answers
From Central nervous system (CNS) do cells that innervate neuromuscular junctions originate.
The brain and spinal cord are the two components of the central nervous system: The brain is in charge of how we learn, think, move, and feel. The spinal cord relays information back and forth between the brain and the body's network of nerves. The processing hub of the body is the central nervous system. Most bodily processes, including as awareness, movement, thought, speech, and the five senses of sight, hearing, sensation, taste, and smell, are under the control of the brain. The brain, spinal cord, and cerebellum make up the central nervous system (CNS).
The body's organs, muscles, and senses communicate with the central nervous system (CNS) via the peripheral nervous system (PNS), which is made up of nerves. Two main components make up the nervous system: the brain and spinal cord
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Suggest two specific reasons why determining the cause of death can sometimes be difficult.
Answers
Answer:
1. The person has been dead for a while so the body is old.( Decomposed)
2. The manner or cause of death (injuries)
Explanation:
1.
Determining the cause of death could be difficult if the person has been dead for sometime. This is going to make the body to be more decomposed since the body has become old.
2.
Another reason is if the cause of death is from an accident and the dead person sustained great injuries. The condition of the body would be poor and this is going to make examination difficult.
All nervous tissue is made up of nerve cells or _______. These transmit high-speed signals called ______ which can be thought of as being similar to an electric current.
Word bank: electrical impulses, dendrites, nerve impulses, axons,neurons
Blank 1:
Blank2:
Answers
Following are the answers:
Blank 1: neurons
Blank 2: nerve impulses
What is a nervous tissue?Nervous tissue is a type of tissue that is found in the nervous system, which is responsible for the control and coordination of the body's functions. It is made up of two main types of cells: neurons and neuroglia.
Neurons are the primary cells of the nervous system. They are responsible for transmitting electrical signals, also known as nerve impulses, throughout the body. They have specialized structures such as a cell body, dendrites, and axons. Dendrites receive signals from other neurons and the axon transmit signals to other neurons.Neuroglia, also known as glial cells, are non-neuronal cells that provide structural and metabolic support for the neurons. They help to maintain the environment of the neurons and to protect them from injury. They also play a role in the formation of the blood-brain barrier and in the removal of waste products from the nervous system.Learn more about nervous tissue, here:
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What molecule is required for activation of a CDK?
cdk2
cyclin
centromere
APC
Answers
The molecule that is required for activation of a CDK (Cyclin-Dependent Kinase) is a cyclin.
Cyclins are regulatory proteins that bind to and activate CDKs, which are enzymes that control the cell cycle by phosphorylating other proteins. Different CDKs are active at different stages of the cell cycle, and their activity is regulated by the presence or absence of specific cyclins. For example, CDK2 is activated by cyclin E during the G1 phase of the cell cycle, allowing the cell to progress from G1 to S phase. Cyclin-CDK complexes are also subject to regulation by other molecules, such as CDK inhibitors (CKIs) and the anaphase-promoting complex/cyclosome (APC/C), which help to ensure proper cell cycle progression and prevent the development of cancerous cells.
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The force Earth exerts on objects on or near its surface
A. Inclined plane
B. Force
O
C. Load
D. Gravity
E. Simple machine
Answers
Explanation: I hope this helps you !
A change is speed is called
Answers
Answer:
Im pretty sure this is acceleration
Answer: velocity
Explanation:A change in speed is a change in velocity
Geneticists often use a to calculate the frequencies of different genotypes and phenotypes in offspring
Answers
Geneticists often use a Punnett square to calculate the frequencies of different genotypes and phenotypes in offspring.
A Punnett square is a graphical representation used by geneticists to determine the probability of an offspring's genotype based on the genotypes of its parents. The Punnett square is divided into boxes, with each box representing a possible genotype of an offspring resulting from the combination of the alleles contributed by the parents.
The probability of each genotype can be calculated by counting the number of boxes that contain that genotype and dividing by the total number of boxes. Similarly, the frequency of each phenotype can be calculated by counting the number of boxes that correspond to that phenotype and dividing by the total number of boxes. Punnett squares can be used to predict the results of crosses involving one or more genes, including those that exhibit dominant and recessive traits, incomplete dominance, and codominance.
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light travels across the diameter of the orbit of neptune in
Answers
Light travels across the diameter of the orbit of Neptune in approximately 4 hours and 10 minutes.
How light travelsThe average diameter of Neptune's orbit is approximately 4.5 billion kilometers (2.8 billion miles).
The speed of light in a vacuum is about 299,792 kilometers per second (186,282 miles per second). To calculate the time it takes for light to travel across the diameter of Neptune's orbit, we divide the distance by the speed of light:
4.5 billion kilometers / 299,792 kilometers per second = approximately 15,003 seconds
Converting the seconds to hours and minutes:
15,003 seconds ≈ 4 hours and 10 minutes
Therefore, light takes around 4 hours and 10 minutes to travel across the diameter of Neptune's orbit.
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engorgement and elevation of the testes becomes more pronounced during which phase?
Answers
Engorgement and elevation of the testes becomes more pronounced during: orgasm, option b is correct.
During orgasm, there is a release of sexual tension and a series of muscular contractions, including those in the pelvic region. This contraction causes the testes to elevate and become more engorged. It is a physiological response that occurs as part of the sexual response cycle. The contraction of the muscles surrounding the testes helps propel sperm and semen out of the body during ejaculation.
During sexual arousal, there is increased blood flow to the genital area, including the testes. This increased blood flow leads to engorgement and enlargement of the testes. However, it is during orgasm that the contractions and muscular activity reach their peak, resulting in a more pronounced elevation and engorgement of the testes, option b is correct.
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The complete question is:
Engorgement and elevation of the testes becomes more pronounced during:
a. plateau.
b. orgasm.
c. excitement.
d. arousal.
In which wedge of the two circle graphs do you observe the greatest difference between
the two regions?
Answers
Answer:
Explanation:
a.had to guess but there you go
2
Identify the substance/molecule that will not diffuse.
. (1 Point)
KEY
S = Starch
G = Glucose
I = Starch indicator
I
GS
I
S
SGS
I
G
SG
I
-Beaker
Model cell
Activate Windows
Go to Settings to activate Window
Answers
The Starch Indicator has a molecular weight of approximately 384.31 grams per mole.
The substance that will not diffuse is Starch Indicator. When attempting to move across a selectively permeable membrane, not all substances can diffuse. Diffusion is a passive process that occurs as a result of random molecular movement.
What is diffusion?Diffusion is the process of moving molecules from a high concentration to a low concentration until equilibrium is established. The term "passive transport" refers to the process of diffusion, which does not require energy in the form of ATP molecules.
This movement is driven by the potential energy difference between two regions of the membrane. As a result, molecules move from areas of high concentration to areas of low concentration.
In addition, substances with a lower molecular weight and smaller particle size have a higher probability of moving via diffusion.Molecules that cannot move through a selectively permeable membrane are not able to diffuse.
Starch Indicator is an example of a substance that cannot diffuse through a membrane. It is a heavy molecule that cannot cross a selectively permeable membrane.
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explain the concept of survival of the fittest
Answers
Answer:
best will survive
Explanation:
were the top animal survives because nature is cruel and beautiful place and its a kill or be killed world where the best and strongest survive
Complete the food chain using the following animals and key terms:
Plants and Animals:
Mice, Cacti, Rattlesnakes, Scorpion
Food Chain Levels: Producers:
Primary Consumers, Secondary Consumers, Tertiary Consumers
Answers
Trophic chains involve the interaction of organisms in different levels that feed on each other and trasfere energy. Producer: Cacti. Primary consumer: Mice. Secondary consumer: Rattlesnakes and scorpion.
What is a food chain?
Trophic chains are composed of different interacting organisms. This interaction involves the transference of energy, which occurs when some of them feed on the other ones. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
The first link corresponds to a producer organism -autotroph-.The following links are the consumers -heterotrophs-: herbivores and carnivores.The last links are the decomposers that degrade organic matter from dead organisms.When a sudden change affects any of the involved links, there can be a cascade effect on the chain.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
In the exposed example,
Producer: Cacti ⇒ is the autotroph organismPrimary consumer: Mice ⇒ is the herbivoreSecondary consumer: Rattlesnakes and scorpion ⇒ are carnivoresYou can learn more about trophic chains at
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Distinguish between a prokaryotic cell and a eukaryotic cell by selecting the accurate statements that apply to eukaryotic cells. Check all that apply. A) Only eukaryotic cells have flagella. B) Only eukaryotic cells have mitochondria. 0 Only eukaryotic cells have a cell membrane. D) Only eukaryotic cells have an endoplasmic reticulum. Only eukaryotic cells have DNA enclosed in a nucleus.
Answers
Answer:
B) Only eukaryotic cells have mitochondria
Only eukaryotic cells have DNA enclosed in a nucleus.
Explanation:
This is because eukaryotic cells are cells that have membrane bound organelles like RIBOSOMES, mitochondria, endoplasmic recticulum, Golgi apparatus e.t.c and they have nucleus. Their DNA are enclosed in a nuclear envelope. They are mostly multicellular cells and their memberane bound nucleus and organelles perform several roles.
In guinea pigs, a black coat (B) is dominant to an albino coat (b), and short hair (H) is dominant to long hair (h). A BbHh guinea pig is crossed with a bbHH guinea pig. If 30 offspring are produced, how many would be expected to be A) black with short hair, B) albino with short hair, and C) albino with long hair?
Answers
When A BbHh guinea pig is crossed with a bbHH guinea pig at that time the gametes are are the progeny produced. The gametes out from BbHh will be BH,bh,Bh and bH and on the other side the gametes are bH, bH, bH and bH. 16 offsprings are produced and from these only 8 black short hair with 8 albino short are produced.
What is the homozygous condition ?It is the condition in which the gametes that are present are identical that is same type of gametes are present.
In this condition given, firstly 16 offspring are produced and from these 8 are albino short, 8 are black short since there is no long hair for h present in the second pig that is mated there will be no chance of long hair in the progeny.
The gametes out from two are BH,bh,Bh and bH from the 1st pig and bH,bH,bH and bH. On fusing it forms BbHH,bbHh,BbHh,bbHH,BbHH,bbHh,bbHH,BbHH,bbHh,BbHh,bbHH,bBHH,bbHH,BbHh and bbHH.
8 are black short and 8 are albino short.
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When there is no pattern to a
population's growth, it is known as
A. irregular
B. stable
C. irruptive
D. cyclical
Answers
When there is no pattern to a population's growth, it is known as stable. The correct option is B.
What is population growth?The rise in the number of people on Earth is referred to as population growth. The majority of human history saw a relatively steady population size. Energy, food, water, and medical care, however, became more accessible and dependable as a result of innovation and industrialisation.
The predicted population expansion is due in part to factors like an increase in young, unmarried mothers, high fertility rates for specific ethnic groups, and a lack of access to contraception and sexual education.
When age-specific fertility and mortality rates are constant over a long period of time, there is a stable population growth.
Contrarily, an irregular population increase is one in which there is no structure and the population size behaves chaotically.
Thus, the correct option is B.
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describe the primary muscles that are involved in chewing and propelling the food bolus into the pharynx for the early stages of swallowing.
Answers
The primary muscles involved in chewing and propelling the food bolus into the pharynx for the early stages of swallowing are Masseter, Temporalis,Medial and lateral pterygoids, tongue muscles, and pharyngeal muscles.
Masseter muscle helps with the elevation of the lower jaw, allowing for biting and chewing of food. Temporalis muscle also aids in elevating the lower jaw and plays a role in maintaining jaw closure. Medial and lateral pterygoids muscles help move the lower jaw from side to side, assisting in grinding food.
During chewing, these muscles work together to break down the food into smaller particles. As you begin to swallow, the following muscles help propel the food bolus into the pharynx are tongue muscles push the food bolus towards the back of the mouth and into the pharynx, and Pharyngeal muscles contract to move the bolus from the mouth into the pharynx. In summary, the masseter, temporalis, medial and lateral pterygoids, tongue muscles, and pharyngeal muscles work together to help you chew and propel the food bolus into the pharynx for the early stages of swallowing.
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what organelles do both prokaryotic and eukaryotic cells contain?
Answers
Answer:
All cells have a plasma membrane, ribosomes, cytoplasm, and DNA.
Explanation:
trust me :)
What is the name of the condition that exists when the capillaries in the lung have greater permeability, which leads to rales and stiff alveoli
Answers
The condition that exists when the capillaries in the lung have greater permeability, leading to rales and stiff alveoli, is called Acute Respiratory Distress Syndrome (ARDS). In ARDS, the increased permeability of the lung capillaries allows fluid to leak into the alveoli, causing difficulty in oxygen exchange and resulting in respiratory distress.
Rales, or crackles, are abnormal lung sounds that can be heard through a stethoscope, while stiff alveoli are less compliant and make it harder for the lungs to expand and take in oxygen. Prompt treatment and supportive care are essential for patients with ARDS to improve outcomes and reduce complications.
The condition you are referring to is known as pulmonary edema. It occurs when there is an abnormal accumulation of fluid in the lungs due to increased permeability of the capillaries. This can lead to symptoms such as rales (crackling sounds) in the lungs, difficulty breathing, and coughing up frothy sputum. The stiffening of the alveoli, which are the tiny air sacs in the lungs, can also cause decreased oxygen exchange and further exacerbate breathing difficulties. Pulmonary edema can be caused by various factors such as heart failure, kidney failure, infections, and exposure to high altitudes or toxic substances. Treatment usually involves addressing the underlying cause and administering oxygen therapy, diuretics to remove excess fluid, and medications to improve heart function.
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