Based on changes in human populations from ancient times to the present, what do you think might have happened to movement of human genes? Check all that apply. there is a larger pool of human genes there is more genetic variation in a given human population than in the past genes move more easily from one population to another humans continue to change, as genes continue to move
Answers
Answer:
All of them are right
Explanation:
Following option applies here:
there is a larger pool of human genesgenes move more easily from one population to anotherhumans continue to change, as genes continue to moveWhat is gene pool?A gene pool is the total collection of all the genes, including variations (alleles), in a particular species or population. It refers to the genetic diversity within a population and includes all the different versions of a gene that can be found in the individuals of that population.
The gene pool can change over time due to genetic drift, mutation, and migration, which can lead to the evolution of a population. The larger the gene pool, the more variation and diversity there is within a population, and the greater the potential for adaptation to changing environments.
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Related Questions
quizlet cancer antigen-binding domains/sites of an antibody molecule are made up of heavy and light chains
Answers
Answer:
ystsrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
Explanation:
rrrrysrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrt
I AM LITERALLY CRYING RIGHT NOW PLEASEE HELPPP WILL MARK BRANLIEST HELPPP MEE
Part 1: Explore
Based on your research and observations of the three common states of matter, answer the
following questions.
Out of the videos, animations, and images you researched, which was your favorite? Why?
Do you feel it accurately represented the differences between each state of matter
How does the space between the particles in each state of matter differ?
How do the particles in each state of matter move?
Part 2: Explain
Examine the heating curve of water below, and then answer the questions about it. If you require the use of a text reader, open the file Heating Curve of Water to receive the information.
Which three parts of the graph’s curve represent the solid, liquid, and gaseous state of water?
Explain your reasoning.
Which point of the graph’s curve represents the melting point of water? Explain your reasoning.
Which point of the graph’s curve represents the boiling point of water? Explain your reasoning.
What happens to the energy of water in Part B and Part D of the graph’s curve? How do you know?
Why does the temperature of the water stay the same when it melts and boils?
Now comes the hands-on part of your project! You will continue to explore phase changes by performing an experiment and creating your own heating curve. Before you begin your experiment, read over the following information.
The materials you will need for your experiment are listed below.
small pot
measuring cup (must have mL and oz markings)
spoon (wooden, plastic, or metal)
ice
water
stove
thermometer (should have units in °C
Time (min) Temperature of Water (°C) Observations of Water
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Place 14 oz of crushed ice into a small pot. Then add about 125 mL of water to it.
Using the thermometer, measure and record the initial temperature of the ice water. List this temperature in °C in the “0” minutes row of your data table in the lab handout. *Do not allow the thermometer to touch the bottom of the pot when recording measurements.
Place the pot on the stove, and turn the knob to the medium-low setting.
Using the thermometer, measure the temperature every minute until the water begins to boil vigorously. Record this data in the table on your lab handout.
At each measurement, also record what is happening to the water. Be sure to record the times of these events:
The ice melts.
The water forms steam.
The water begins to boil.
Once the water has begun to boil, stir the water constantly with the spoon.
Continue to measure and record the temperature every minute until almost all the water has boiled and the pot is close to empty.
Record the last temperature, and turn off the stove. DO NOT TOUCH THE POT WITHOUT SAFETY EQUIPMENT.
Create the x-axis and y-axis of a graph.
Label the x-axis as follows: Time (min).
Label the y-axis as follows: Temperature of Water (°C).
Along the x-axis, create and label 15 marks, one for each minute of the experiment. (Hint: The origin starts at 0.)
Along the y-axis, create and label temperature markings for every 20 degrees. (Hint: The origin starts at 0.)
Refer to the data from your experiment to plot the points on your graph. Then connect each of the data points with a line.
Look over your graph to make sure it is clear and correctly labeled.
Either save your graph as a computer file, or take a picture of your graph and upload it as a file on your computer.
Describe your experience in performing the experiment. What went well? What could have been
improved?
Examine your line graph. How does the graph’s slope change over time?
Examine your line graph. Why does the slope change?
How could you apply the knowledge gained from this experiment in the real world?
Hint: Think of cooking.
Make a prediction. How do you think adding other substances to the water would affect its
heating curve?
THANK YOU SO MUCH
Answers
Answer:
think of cooking
Explanation:
the reason is that I just know it
what is the thin membrane that sticks to both shells and forms siphons that are used for drawing in and expelling water.membrane of bivalaves '
Answers
The mantle is the thin membrane that sticks to both shells and forms siphons that are used for drawing in and expelling water membrane of bivalaves
What is Mantle ?Numerous species have modified their muscular mantles to allow them to syphon water for propulsion and feeding. The mantle of mollusks with shells, like clams, mussels, and snails, secretes calcium carbonate and a matrix to create the mollusk's shell.
Between the shell and the body is a layer of tissue known as the mantle. To create the shell, it secretes calcium carbonate. It creates a space between the mantle and the body known as the mantle cavity. For filter feeding, the mantle cavity pumps water.
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When chiasmata can first be seen in cells using a microscope, which of the following processes has most likely occurred? the separation of homologs anaphase II prophase I meiosis II
Answers
When chiasmata can first be seen in cells using a microscope, the following processes has most likely occurred in prophase I.
When chiasmata can first be seen in cells using a microscope?Recombination can occur at any two chromatids within this tetrad structure.
Crossovers between homologous chromatids can be visualized in structures known as chiasmata, which appear late in prophase I.
Thus, option "C" is correct, Prophase I.
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Q 2. In fruit flie, red eye (A) are dominant to black eye (a) and long wing are dominant to hort wing. Aume that a cro wa made between fruit flie of genotype AAbb (red-eyed with hort wing) and thoe of genotype aaBB (black eye with long wing). Give the Punnett quare for the expected F2 progeny (offpring) type
Answers
Red eyes are more prevalent than green eyes in fruit flies. AaBb x aabb would be the offspring of a cross between such a short-winged, green-eyed fly as well as a long-winged, red-eyed fly.
The parents are homogeneous for these recessive features because red eyes are dominant over green eyes and large wings were dominant over small wings. A short-winged, green-eyed parent's genotype is aabb, and a long-winged, red-eyed parent's genotype is AaBb.
Red-eyed and green-eyed offspring are produced in a ratio of 1:1, as are offspring with long and short wings. One dominant and one recessive offspring result from a cross involving heterozygous dominant & homozygous recessive genes. This indicates that the parent fly's large wings and red eyes are heterozygous for the color of the eye.
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Name the outermost layer of a plant cell that protects and supports it.
Answers
The outermost layer of a plant cell is called the cell wall. It is a rigid layer that provides protection, support, and shape to the cell.
The cell wall is made up of cellulose, hemicellulose, and pectin, which are complex polysaccharides that give it its strength and flexibility.
The cell wall plays an essential role in maintaining the structural integrity of the plant, protecting it from mechanical stress, and preventing it from bursting due to osmotic pressure. It also acts as a barrier to protect the cell from pathogens and other harmful agents.
In addition to its structural functions, the cell wall also plays a crucial role in cell communication and growth. The cell wall contains small channels called plasmodesmata that allow for the exchange of nutrients and signaling molecules between adjacent cells.
Overall, the cell wall is a critical component of plant cells that provides both structural support and functional versatility, enabling plants to survive and thrive in their environment.
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How are the equations for photosynthesis and cellular respiration related
Answers
HOPE THIS HELPS! :)
Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O. Photosynthesis: 6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O.
find the LCM of two numbers if there product is 160 and hcf is 4.
Answers
Answer:
40
Explanation:
given
product of two numbers =160
hcf =4 we know that
hcf*LCM=product of the numbers
LCM*4=160
LCM=160/4
LCM=40
How would an atom of gold compare to an atom of carbon?
A they would be different
B they would be the same
Answers
Answer:
a
Explanation:
Answer:
A. They would be different
Explanation:
They would be different since they are different elements on the periodic table of elements.
Hydrogen peroxide is a compound that contains two hydrogen atoms for
every two oxygen atoms. Which type of matter is hydrogen peroxide?
A. It is a crystal.
B. It is a pure substance.
C. It is a homogeneous mixture.
D. It is a heterogeneous mixture.
SUBMIT
Answers
Answer:
I think it is a pure substance, not 100% though.
Answer: it is pure substance
Explanation:
which statement correctly describes events in the space race
A. The soviet union sent the first human into space, and the United States sent the first human to the moon.
B. Germany sent the first human into space, and the United States launched the first artificial satellite.
C. The soviet union launched the first artificial satellite, and the United States sent the first human into space
D. The United States sent the first human into space and sent the first human to the moon
Answers
Answer:A
Explanation:
Plz help! In a density-dependent population, a decrease in which of the following will most likely cause an increase in birthrate?
Carrying capacity
Death rate
Emigration
Immigration
plz don't put link or ill report
Answers
In a density-dependent population, a decrease in the death rate will most likely cause an increase in birthrate. It is because a lower death rate means that more individuals are surviving, which can lead to an increase in the number of individuals reproducing, ultimately resulting in a higher birthrate. The correct option is B.
What is a density-dependent population?As we know that a population's birthrate tends to increase if there is a decrease in death rate, which also results in a decrease in carrying capacity.
Also, a density-dependent population is a population where the death rate increases and birthrate decreases with increasing population density, and vice versa. So, a decrease in the death rate of a density-dependent population will most likely cause an increase in the birthrate.
A density-dependent population is a population where the death rate increases and birthrate decreases with increasing population density, and vice versa. A decrease in the death rate of a density-dependent population will most likely cause an increase in the birthrate.
Therefore, the correct option is B.
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Which of the following is the best definition of an unsaturated fatty acid? 8 A. A basic unit of a lipid that consists of single and double carbon-to- carbon bonds B. A compound that carries hereditary information C. An insoluble compound made up of glycerol and three fatty acids D. A basic unit of a lipid that consists of only single carbon-to-carbon bonds
Answers
what are complications you may see as a result of poor nutrition?
Answers
Answer:
Obesity
Explanation:
Obesity is one of the most common complications an individual can receive as a result of poor nutrition.
a tiny cell structure that carries out a specific function within the cell. T/F
Answers
The statement: a tiny cell structure that carries out a specific function within the cell is known as an organelle is TRUE because organelles are membrane-bound structures that carry out specific functions within the cel
This statement describes the function of an organelle within a eukaryotic cell. Organelles are membrane-bound structures that carry out specific functions within the cell.
Examples of organelles include mitochondria, which generate energy for the cell, and ribosomes, which synthesize proteins. Each organelle has a specific function that contributes to the overall functioning of the cell. Organelles are found only in eukaryotic cells, which are cells that have a defined nucleus enclosed by a membrane.
Prokaryotic cells, which do not have a defined nucleus, do not have organelles. Instead, their functions are carried out by various structures within the cell.
The complete question is :
A tiny cell structure that carries out a specific function within the cell is known as an organelle. T/F?
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Listed below are adaptations of terrestrial (land) vertebrates. Which is a characteristic only of truly terrestrial animals with no need to return to water at any stage of the life cycle? Select one: a. lungs b. hearts with more than two chambers c. amniotic eggs
Answers
The characteristic only of truly terrestrial animals with no need to return to the water at any stage of the life cycle is c. Amniotic eggs
Amniotic eggs are a unique adaptation found in reptiles, birds, and mammals. These eggs have a protective shell and contain specialized membranes that allow the embryos to develop in a terrestrial environment without the need for an aquatic environment. This adaptation is crucial for reproduction and allows these animals to complete their entire life cycle on land without the need to return to the water for reproduction or development. Amnion: The amnion is a fluid-filled sac that surrounds and protects the developing embryo. It helps cushion and provide a stable aquatic environment for the developing embryo, preventing desiccation and physical damage. Chorion: The chorion is an outer membrane that surrounds the amnion and other embryonic membranes. It helps facilitate gas exchange, allowing oxygen to enter the egg and carbon dioxide to be removed.
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a compound with the molecular formula c5h10o2 has the following nmr spectrum. determine the number of protons giving rise to each signal.
Answers
The number of protons giving rise to each signal is 3.
Each distinct set of chemically equivalent protons in a molecule will give rise to a separate signal in the NMR spectrum. Chemically equivalent protons are protons that occupy the same chemical environment, meaning they experience the same magnetic field and thus have the same chemical shift.
By examining the spectrum, you can identify distinct peaks or signals corresponding to different chemical shifts. The number of signals in the spectrum indicates the number of distinct sets of chemically equivalent protons in the molecule.
Factors such as the molecular structure, symmetry, and the presence of functional groups can influence the number of signals observed. For example, if a molecule has multiple sets of chemically equivalent protons, each set will give rise to a separate signal.
It's important to note that signals can be further split into sub-peaks or multiplets due to coupling between neighboring protons. This splitting pattern provides additional information about the connectivity of protons in the molecule.
In summary, the number of signals in an NMR spectrum corresponds to the number of distinct sets of chemically equivalent protons in the molecule, with each set exhibiting a unique chemical shift.
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If a diploid organism has somatic cells with 14 chromosomes, how many different gametes can the organism produce without recombination?.
Answers
The gametes produced by the diploid organism without recombination is 7.
How do you calculate the total number of gametes?
A specific formula 2n is used to calculate the total number of gametes produced by a particular genotype, where n= the number of heterogeneous alleles found in the genotype. The given genotype consists of two heterozygous alleles, Bb and Cc, and one homozygous allele, AA.
Each gamete has a single copy of each chromosome, and each chromosome has one allele for each gene. As a result, each allele for a given gene is packaged into a separate gamete.
Therefore, in a diploid organism with 14 chromosomes, 7 gametes can be formed without recombination.
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loss of phytoplankton in the ocean would constitute a(n) effect on the marine ecosystem because .
Answers
Loss of phytoplankton in the ocean would constitute a primary effect on the marine ecosystem because phytoplankton is considered the base of the food web. Phytoplankton are single-celled microscopic organisms that are able to carry out photosynthesis.
This means that they are able to convert light energy into chemical energy, which is then stored in the bonds of organic molecules.Photosynthesis in phytoplankton is responsible for the production of nearly 50% of the oxygen that is released into the atmosphere. It also forms the basis of the marine food web, where it is consumed by zooplankton. The zooplankton are then consumed by larger organisms, and so on.This makes phytoplankton the primary producers in the ocean, as they are responsible for the initial input of energy into the food web. If phytoplankton were to decline, it would cause a ripple effect throughout the ecosystem, ultimately leading to the collapse of the food web and the loss of biodiversity. This is because there would be a shortage of food for the zooplankton, which would then result in a shortage of food for the larger organisms that depend on them.
Loss of phytoplankton in the ocean would constitute a primary effect on the marine ecosystem because phytoplankton is considered the base of the food web. Phytoplankton are responsible for the initial input of energy into the food web, as they are the primary producers in the ocean. They are consumed by zooplankton, which are then consumed by larger organisms, and so on. If phytoplankton were to decline, it would cause a ripple effect throughout the ecosystem, ultimately leading to the collapse of the food web and the loss of biodiversity.
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What do you call a system that reverses the original stimulus
A. Positive feedback
B. Negative feedback
C. Stressor
D. Response
Answers
Answer:
Positive feedback
Explanation:
It is positive feedback since positive feedback always ends with counter-signaling/ suppresses the original stimulus. In other words, it goes against the original stimulus.
Answer:
Negative feedback
Explanation:
If right could i get brainliest...but if im wrong then im sorry!
18. Which of the following is not an advantage of using biological control?
A. It does not pollute the environment
C. It does not affect the health of humans
B. It upsets the natural food webs in the area
D. It is not costly
Answers
Answer:
Explanation:
It upsets the natural food webs in the area
i think B is the answer..
sorry if its not.
A male rabbit that is heterozygous for both traits and a female rabbit heterozygous for both traits. What is the proportion of their offspring that is white haired and black eyed?
Answers
Answer:
(In Description)
Explanation:
As the male is long-haired with a black coat means genotype Bbss and the female is having short hair and black coat means genotype BbSs. The offspring genotype can be BBSs, BBSs, BbSs, and bbss.
What is a genotype?
In a broad sense, the term "genotype" refers to an organism's genetic makeup; in other words, it describes an organism's entire set of genes. In a narrower sense, the term can refer to the alleles, or variant forms of a gene, that an organism carries.
Black hair in rabbits is determined by a dominant allele, B, and brown hair by a recessive allele, b. Short hair is caused by a dominant allele, S, whereas long hair is caused by a recessive allele, s.
The Punnett square for the given scenario can be shown in the image attached below:
Thus, these can be the genotype of the offspring.
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Please help! Just one question! :)
Answers
Answer:
semiconservative
Explanation:
PLEASE ANSWER ASAP!! WILL MAKE BRAINLIEST!!
What is the main type of weathering in deserts?
a. physical weathering
b. weathering by organic acids
c. chemical weathering
Answers
The two main types of weathering which occur in deserts are Mechanical weathering, which is the disintegration of a rock by mechanical forces that do not change the rock's chemical composition and Chemical weathering, which is the decomposition of a rock by the alteration of its chemical composition.
Hope this helps! :^)
large air tubes leading from the trachea to the lungs which convey air to and from the lungs; consist of primary, secondary or tertiary and right and left bronchioles
Answers
Answer:
Explanation:
Further down, the trachea divides into two tubes (left and right) called bronchi (BRAHN-kye). The bronchi connect the trachea to the lungs.
During science class, Mauricio made sketches of the major organelles of the cell. Which of the following is his sketch of a mitochondrion?
Answers
Answer: B
Explanation: I did The test
During science class, Mauricio made sketches of the major organelles of the cell. The second sketch describes a mitochondrion. The correct option is B.
What are mitochondria?The “powerhouses” of the cell, mitochondria, break down fuel molecules and harvest energy during cellular respiration. Chloroplasts and mitochondria probably started as microorganisms that were swallowed by larger cells (the endosymbiont theory).
A mitochondrion is a membrane-containing cell organelle. It is the site of energy-producing metabolic processes and cellular respiration. The process happens inside mitochondria.
Thus, the link between cellular respiration and photosynthesis is that the reactant in photosynthesis is a byproduct of cellular respiration.
Therefore, the correct option is diagram B.
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After the egg hatches, the amphibian breathes with gills and swims around in the water. What stage of the amphibian life cycle is this?
adult stage
larvae stage
egg stage
metamorphic stage
Answers
After the egg hatches, the amphibian breathes with gills and swims around in the water therefore the stage of the amphibian life cycle is larvae stage and is denoted as option B.
What is an Amphibian?This is referred to as a cold-blooded vertebrate animal which is characterized by having an aquatic gill-breathing larval stage followed by a terrestrial lung-breathing adult stage. Example of this type organism include frogs, salamanders etc and they don't undergo the pupa stage in their life cycle.
In the larval stages, they use gills to respire as they live in water and as the larvae grows and mature they develop lungs to respire on land. This is therefore the reason why they are able to survive in both aquatic and terrestrial environment and is therefore the treason why option B was chosen as the correct choice.
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In general, invasive species tend to fall into which category of organisms?
a. K-selected, because they can easily disperse offspring over a large area
b. K-selected, because maintaining the population around carrying capacity ensures stability in the new area over time
c. K-selected, because small body size leads to short generation times and increased invasion into new environments
d. r-Selected, because a longer life span is needed to properly establish a new population in a new area
e. r-Selected, because high reproductive rates allow them to invade a new area quickly
Answers
Invasive species tend to fall into r-Selected, because high reproductive rates allow them to invade a new area quickly.
What is are r-selected species?r-selected species are a type of organisms that have high reproductive rates and prioritize rapid population growth over individual survival. These species are well-adapted to environments that are unpredictable and have high levels of disturbance, such as temporary habitats, and rely on their high reproductive potential to ensure that some offspring survive to maturity.
They often have short lifespans, produce many offspring that have low survival rates, and grow quickly. Examples of r-selected species include annual plants, insects, and some types of bacteria.
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A hybrid pea is produced by self-pollination.
Answers
Answer:
usually self-pollinate
A wildlife biologist catches a number of fish, and finds that
18 have tags. That is 12% of the number caught.
How many fish were caught?
Answers
The wildlife biologist caught 150 fish.
What is wildlife biologist ?A scientist that focuses on the study of wildlife, their habitats, and their interactions with the environment is known as a wildlife biologist.
Let's assume that the variable "x" stands for the quantity of fish caught.
18 fish, or 12% of the total number of fish collected, have tags, according to the information provided.
This can be written mathematically as:
18 = 0.12 * x
To find the value of "x," we can solve this equation for "x." Dividing both sides of the equation by 0.12 gives us:
x = 18 / 0.12
Performing the calculation:
x = 150
Therefore, approximately 150 fish were caught
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