Answer:
A- a different combination of genes is provided to each gamete
Explanation:
Crossing over accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical
If there are 60 crayfish living in a pond that is 20 cubic yards, what is the population density?
Answer:
80
Explanation:
What type of cells do you find homologous chromosomes?
"Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid. The matched pairs of chromosomes in a diploid organism are called homologous chromosomes."
30. What is the name of the process by which new cells are made for growth and repair?
Answer:
cell division
Explanation:
This is where cells would get damaged or die and this process calls cell division occurs
Answer:
cell division,the process of mitosis
Each chromosome contains thousands of genes. Each gene contains the
information required to build specific……..
needed in an organism.
A. Carbohydrates
B. Lipids
C. Proteins
The loss of most vegetation is a prominelt cause of desertification. (Tor F)
PLEASE HELP
Answer: true
Explanation:
Why does sodium and potassium ions need a protein pump to pass through the cell membrane?
A. The ions have a charge and cannot pass directly through the cell membrane.
B. The ions are moving against the concentration gradient.
C. Energy is needed to move the ions.
D. All of the above.
Cell membrane have been the selective membrane that allows transportation. Sodium and potassium ions need a protein pump as they are charged particles that move against the gradient and need energy. Thus, option D is correct.
What is active transport?Active transport has been the way to move ions and molecules inside and outside the cell membrane. This system of transportation requires energy as the ions move from low concentration regions to the region of the higher electrochemical area.
The sodium and potassium pump needs proteins and energy to move the ions as the inside of the cell is rich in potassium and the exterior is rich in sodium ions. The charged ions moving against the concentration cannot enter the cell without energy and protein pumps.
Therefore, option D. all of the above statements are correct.
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Which of the following is true about the role of genetic and environmental factors in human health?
A) Genes are the only factor affecting whether or not an idividual will contract a disease.
B) Genetic factors are more important than environmental factors in determining an individual's
personal health risks.
C) Individuals can influence their health by controlling their genetic traits.
D) Environmental factors determine whether or not all genetic traits lead to health issues.
E) Certain environments can lead to an increased risk of developing certain diseases.
Answer:
E) Certain environments can lead to an increased risk of developing certain diseases.
Explanation:
The lesson states that specific environments can increase the chance of health problems.
why is this conversion of energy from one molecule to another necessary for all cells?
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Actually Welcome to the Concept of the energy conversion
=> ATP can be used to store energy for future reactions or be withdrawn to pay for reactions when energy is required by the cell.
=> When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP).
Need help asap...............
Answer:
Cheetahs and lions
Explanation:
They feed on the same prey. Therefore, if they live in the same area, one or both species will have less food. You might expect them to fight each other over food, but they do not.
Answer:
Cheetah And Lions can you mark me Brainlest?
The Moon completes one orbit around the Earth in approximately
in approximately
and completes one cycle of its phases
A 271/3 days, 24 hours
B 24 hours, 24 hours
C 24 hours, 29 1/2 days
D 27 1/3 days, 29 1/2 days
Answer:
Answer is D
Explanation:
Takes about then to circle the Earth
Answer:
It takes 27 days, 7 hours, and 43 minutes
Explanation:
Do plants complete cellular respiration like humans to create energy?
Answer:
Yes
Explanation:
Cellular respiration is the process of using the chemical energy stored in sugars. The reaction is the mirror image of photosynthesis: glucose, + oxygen yields carbon dioxide +water. Like all living things, plants go through cellular respiration to obtain energy for growth and reproduction.
In a DNA molecule, the number of adenine bases equals the number
of thymine bases because thymine on one strand bonds to adenine
on the other strand.
True or false
It is TRUE that in a DNA molecule, the number of adenine bases equals the number of thymine bases because thymine on one strand bonds to adenine on the other strand.
DNA COMPOSITION:
DNA is composed of nucleotides subunits. There are four nucleotides present in the DNA molecule namely: Adenine, Cytosine, Guanine and Thymine. Adenine and Thymine hydrogen bond together while Cytosine and Guanine hydrogen bond together i.e. A-T, G-C. According to Chargaff rule, the amount of adenine bases equals the amount of thymine bases while the amount of guanine bases equals the amount of cytosine bases. This is because adenine on one strand of DNA bonds to thymine on the other strand of DNA, hence, they must be in the same amount.Learn more: https://brainly.com/question/12683542?referrer=searchResults
I NEEEED HEEELP PLZZZZZZZZ :))
Answer:
They would have both black and white feathers because codominance means that both genotypes have to be expressed. Gray isn't an apparent (given) trait.
Which of the following is NOT an ethical concern raised by genetic engineering?
A. Genetically engineered bacteria cells can be used to clean up mining waste and for sewage treatment
B. Creating organisms that are not naturally occurring may disrupt the environment
C. The question may need to be "should we" manipulate genes of organisms instead of "can we".
D. Creating plants with new genes may trigger allergic reactions
Answer:
The Answer Is A.
Explanation:
If They Can Be Used For Cleaning Up Mining Waste And For Sewage Treatment, That Makes Them A Good Thing. So It Wouldn't Be A Concern. Hope This Helps.
Genetically engineered bacteria cells can be used to clean up mining waste and for sewage treatment, which is not an ethical concern raised by genetic engineering. So, the correct option is A.
What do you mean by Genetic engineering?Genetic engineering may be defined as a process that involves the manipulation of the genetic material of organisms with help of lab-based technologies.
Bacterial species produced by genetic engineering used in cleaning up mining waste and sewage treatment benefit the atmosphere by reducing the level of waste and toxic compounds from suuroundings. So, it is not a matter of ethical concern.
Therefore, the correct option for this question is A.
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what effect does pH of water have on radish seed germination?
Explanation:
High pH negatively affected the germination rate of seeds from most species, but had no effect on the per cent germination of any of the species. The higher concentration of the nutritious solutions affected negatively the germination level and rate.
Answer:
A radish seed has a high percentage of germination in PH's 4-12 and a very low percentage of germination in PH 1-3 and PH 13-14.
Santos and Lüderitz are the same distance from the equator, and both cities are near the ocean. The air temperature in Lüderitz is colder than the air temperature in Santos. What causes the air temperature in these places to be different? Explain what causes the difference as completely as you can.
Answer:
The Ocean Currents.
Explanation:
if you look at a current map, you'll see warm currents near Sanots and cold ones near Lüderitz. Therefore, the air in Sanots is a lot warmer and the air in Lüderitz is colder.
The phenomenon of the ocean current is responsible for this deviation of air temperature between two places.
What do you mean by Air temperature?Air temperature may be defined as the temperature of the surrounding air of organisms including humans.
The ocean water captures the heat from the sunlight and increases the temperature of the ocean. This heat is then entranced through ocean circulation and increases the temperature of the air as well as the atmosphere.
The air temperature in Luderitz is colder because the ocean of this region receives less sunlight in low intensity which results in less heat captured by the ocean and makes the air a little bit colder than that of Santos oceans.
Therefore, it is well described above.
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how to do this question plz
Answer:
We are only given one leaf, but the leaves in layer D of the same species would not be identical. Some of them could have deeper indentations or fewer indentations. A wider leaf surface area lets a plant absorb more sunlight, so it would be an advantage if leaves have fewer indentations.
The plants with fewer indentations will reproduce more, passing on their genes for fewer indentations. This repeats for a long time, then plant leaves overall would only have very small indentations (like the leaf for layer B).
Explanation:
There are mutations and variations that make one organism different from another organism, even if they're the same species.
Natural selection is when the environment "chooses" the organisms that have an advantage in the environment to reproduce. Organisms that are selected to reproduce can pass on their genes to future generations.
The deep indentation leaves from layer D were basically "phased out".
Question 5 (3 points)
(02.02 MC)
Which factor does not affect species richness on islands?
a
Available niches
b
Distance from mainland
c
Latitude of island
d
Longitude of island
Answer:
(C) Latitude of island
Explanation:
Which option describes the most suitable forms of energy for the community the following scenario? A rural community located a high desert area has been struggling for years with a lack of growth and employment. Community leaders are learning to harvest new sources of energy that are clean and renewable, and have implemented a research to expand the uses for these energles.
solar and petroleum
wind turbine and solar
Answer:
wind turbine and solar
Explanation:
1 point
The type of cellular transport shown in the image (to the right) is called
Endocytosis
Exocytosis
Osmosis
Diffusion
Answer:
Exocytosis
Explanation:
Exocytosis is when a bulk of molecules exit the cell. The arrows indicate that it is leaving the cell.
Answer:
B. Exocytosis
Explanation:
Exocytosis is the process by which vesicles in the cytoplasm fuse with the cell membrane, releasing their contents into the cell's external environment. Cellular wastes are often disposed through this process.
I will mark someone brainliest! Please help!!
Answer:
The first one
Explanation:
Mark me brainliest please
The graph below shows the relationship between pH and three different digestive enzymes. Which of the following conclusions can be drawn from this graph? A. Digestive enzymes are most active in an environment with a pH of 7. B. Enzymes operate most efficiently within a certain range of temperatures. C. Enzymes are only able to operate in acidic environments. D. Each enzyme operates best within a certain pH range.
Answer:
A
Explanation:
Each enzyme operates best within a certain pH range.
Digestive enzymes are most active in an environment with a pH of 7 is the conclusions can be drawn from this graph.
What is enzymes?Enzymes are referred to as proteins which act as biological catalysts. Catalysts enhance the chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
Each enzyme works within quite a small pH range. There is a pH at which its activity is greatest (the optimal 7 pH) because changes in pH can make and break intra and intermolecular bonds, changing the shape of the enzyme and, therefore, its effectiveness.
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The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully
expounded by Charles Darwin and is now believed to be the main process that brings about evolution
True
False
True
The process is called natural selection and was first explored by Charles Darwin in the 19th century.
NATURAL SELECTION is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. This concept was first developed by Darwin (both statements are TRUE).
Darwin referred to evolution as the process of 'descent with modification'.The main mechanism by which organisms evolve to adapt to their environments is natural selection.The theory of evolution by natural selection was developed by Darwin and it is now widely accepted as the main cause of evolution. According to Darwin, species change (evolve) over time, thereby giving rise to new species that share a common ancestor.In conclusion, NATURAL SELECTION is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of evolution by natural selection was first developed by Darwin (both statements are TRUE).
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Will mark brainliest and give thirteen points if you give explanation
Answer:
A. high tide (A, C)
Explanation:
High tides on points A & C occur when the moon, the Earth, and the Sun are all lined up.
SUN -----<<< EARTH >>> ---
----MOON
( as accurate as it can be in 2D)
As you can see, they are all in a straight line. The gravity of both the moon and the Sun are combined to output the greatest amount of gravitational force as possible; creating high tides on the 2 sides of the Earth. Points A & C represent these two sides and are therefore the answer.
A cell becomes injured and can no longer carry out mitosis. Which statement describes the most immediate effect on the cell? It could be more susceptible to disease. O It could accumulate harmful toxins and wastes. O It would be unable to break down sugars for energy. It would be unable to divide into new cells preventing growth.
Answer:
it could be more susceptible to disease or it could be D
Answer:
It would be D because it's the most immediate situation that would happen to the cell.
Explanation:
AHHHH PLS HELPP Which method is better for the environment: the controlled burn (burning oil off of the water) or using the naturally-occuring bacteria?
Answer:
using the naturally_occuring bacteria
Explanation:
go trying and helping wich with
Desde captar el estimulo hasta efectuar una respuesta, la secuencia que sigue en el impulso nervioso es?
Answer:
creación de un potencial de acción (despolarización), redistribución de iones a través del soma y finalmente repolarización (estado de reposo)
Explanation:
Las neuronas son células nerviosas capaces de transmitir impulsos en forma de corriente eléctrica. Una neurona está compuesta por dendritas, el soma o cuerpo celular y el axón. Durante la transmisión del impulso nervioso, el estímulo es en primer lugar recibido por las dendritas, recorre el soma y termina en el axón. El impulso nervioso se transmite a través de la neurona mediante un proceso de despolarización. Primero, se produce un aumento de la carga eléctrica en el interior de la membrana neuronal debido al aumento de iones de sodio en el interior celular. A continuación, se produce la redistribución de iones dentro del soma, con lo cual la señal se va transmitiendo a lo largo de la neurona. Finalmente, cuando el impulso ha terminado de recorrer el axón, se produce la repolarización o estado de reposo, donde se produce el restablecimiento de las concentraciones iniciales de iones y la neurona vuelve a su estado inicial.
2. How are humans making greenhouse gases of our own?
burning fossil fuels in our cars
burning forests
O all of these
Answer:
All of them. Plus feeding cows corn instead of grass makes them gassy.
Explanation:
Which element is found in both DNA and protein?
Sulfur
Sodium
Nitrogen
Chlorine
Answer:
nitrogen
Explanation:
Answer:
Nitrogen
Explanation:
Hello There!
DNA and protein is made up of nitrogenous bases which contain nitrogen therefore the correct answer would be nitrogen
Which of the major tectonic plates is composed mainly of oceanic lithosphere?
Answer:
A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest.