I need help woth this question

Answer:

The correct answer is - option B. it increases the amount of genetic variation in the species.

Explanation:

Meiosis is a type of cell division that takes place in sex cells or reproductive cells. There is crossing over takes place which is a process where the genetic exchange of chromosomes occurs between non-sister chromatids of homologous chromosomes.

The crossing over leads to the new genetic combinations of genetic material which result in the genetic variation in species. This variation plays a role in the natural selection and evolution of species.

Answer:

Because cells that result from mitosis are diploid i.e. contain two sets of chromosomes.

Explanation:

Mitosis is a type of cell division that produces daughter cells that are genetically identical to the parent cell. The chromosomal number of cells formed from mitosis remains the same as the parent cell. This means that if a parent is diploid (2n), the daughter cells from mitotic division will be diploid (2n).

However, for fertilization during sexual reproduction to occur, two haploid or half of the chromosome number of the parental organism must unite to form a whole diploid organism. In other words, two haploid cells (n + n) must come together in fertilization to give a diploid cell (2n). Hence, combining cells that result from mitosis would not work for fertilization because cells that result from mitosis are already diploid i.e. contain two sets of chromosomes.

Answer:

Oil.

Explanation:

Oil is a resource which has a great impact on our society because it is widely used in our daily life in the engine of vehicles. It is very necessary in the transportation sector but also adversely affected the ecosystem and the animals and plants living in that ecosystem due to production of harmful gases such as carbondioxide and carbonmonoxide gases that polluted the environment and affect the health of people.

Answer:

Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient. Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption

Explanation:

....

Phosphate ions are absorbed by plant roots through the process of active transport, which requires energy and specialized transport proteins.

Plant roots absorb ions such as phosphate ions through a process called active transport. Active transport is the movement of ions or other molecules across a cell membrane against their concentration gradient, from an area of low concentration to an area of high concentration, which requires energy in the form of ATP.

To absorb phosphate ions, plant roots use specialized membrane proteins called phosphate transporters, which are located in the plasma membrane of root cells. These transporters actively pump the phosphate ions from the soil into the root cells, using the energy from ATP hydrolysis. The phosphate ions can then be transported throughout the plant via the xylem vessels and used for various biological processes, such as DNA and RNA synthesis and energy storage.

Learn more about active transport, here:

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Answer:

the genetic constitution of an individual organism.

Explanation:

so like A and B ,A is for mom that would be a genotype

Answer:

No, because bears kill to get their food. They eat fish and they kill the fish to get them. If they left the fish carcass, decomposers would eat it. The bear makes the food for the decomposers, but it is not a decomposer itself... Does that make sense?

Answer:

Rock color chart method

Explanation:

hope this helps

Answer:

Gross productivity refers to the amount of carbon fixed.

Explanation:

Gross productivity refers to the amount of carbon fixed during the process of  photosynthesis by all producers such as plants and algae etc in the ecosystem. A large part of the energy that is produced in the process of photosynthesis is used by the plants in the metabolic processes of the producers such as respiration. The net productivity indicates that carbon dioxide plants that is used during the photosynthesis process substracted from carbon dioxide the plants releases during the process of respiration.

Answer:

be care if use answer ^ got in troulbe reword it really good

Explanation:

Answer:

The U.S. voluntary market defines green power as electricity produced from solar, wind, geothermal, biogas, eligible biomass, and low-impact small hydroelectric sources. ... Such fuel sources include the sun, wind, moving water, organic plant and waste material (eligible biomass), and the earth's heat (geothermal).

Explanation:

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Answer:

pretty sure it’s the lithosphere

Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy. ... Anaerobic respiration also produces energy and uses glucose, but it produces less energy and does not require oxygen.

Answer:

Plants and animals use this process to produce ATP.

Explanation:

the first one is wrong because cellular respiration occurs in almost every cell

the third one is wrong because byproduct of cellular respiration is water, not oxygen(oxygen is used in the reaction)

fourth is wrong because carbohydrates are produced by photosynthesis

second option is right because cellular respiration provides energy(ATP) for cells to use(in order to perform lots of processes)

Answer:

1adaptation are acquired through use of those traits (that was lamarck)

2 . use and disuse (that was lamarck)

3.biochemical evidence (the rest he would have been used, not completely but there would have been elements available there)

Explanation:

Answer:

Because the water-specific heat is much higher than land specific -heat.

Explanation:    

When water solidifies due to the temperature descent, it forms hydrogen bridges between water molecules, separating them from each other. This is the reason for water expansion during the freezing process. To go back to the liquid state, and break down the hydrogen bridges, too much heat is needed. This means that water has high water-specific heat.  

Water-specific heat is the amount of energy in the form of heat needed to raise the temperature of one gram of water one degree Celsius.

Due to its high specific heat capacity, water reduces the temperature changes. For instance, when we are at the river or sea, during sunset, it gets colder because the sun is not heating directly the earth anymore. However, if we touch the water it seems to be warmer. This is because the water calorific capacity is about five times higher than the sand calorific capacity. The land gets colder faster than the water.  

In the same way, when a water body such as a lake is frozen, and there is also ice on the land surface surrounding the lake, and the environment rises its temperature, first the ice on the land defrost and then, after a certain lapse of time, the ice of the water surface also defrosts.

Answer:

The U.S. voluntary market defines green power as electricity produced from solar, wind, geothermal, biogas, eligible biomass, and low-impact small hydroelectric sources. ... Such fuel sources include the sun, wind, moving water, organic plant and waste material (eligible biomass), and the earth's heat (geothermal).

Explanation:

PLEASE MARK ME AS BRAINLIEST

Answer:

both types of cells have a cell membrane

Answer: C. Both types of cells

Answer:

Social Darwinism and Evolution

Explanation:

This are the themes of the 1st chapter of the War of the Worlds by H. G. Wells.

Explanation:

anaerobic respiration as per my opinion .

hope this will be helpful to you.

Answer:

there is no picture attached

Explanation:

Answer:

A. Plants and/or animals relocated or died.

Explanation:

Plants and animals will eventually come back, so that is a short-term effect on the ecosystem.

Hope this helps! :)

Answer: This statement ("antibiotics kill bacteria so they must kill healthy human cells too and they must be avoided at all costs!") is wrong and can be proven to be so in the following explanation about the mode of actions of antibiotics.

Explanation:

Antibiotics are drugs which are used for the treatment of diseases caused by bacteria microorganisms. According to their mode of action, they can either be bactericidal or bacteriostatic.

Bacteriostatic antibiotics work by binding to enzymes needed by bacteria to build proteins essential for their own growth and reproduction. Atypical example is the antibiotics, sulfonamide. This drug acts by inhibiting a critical enzyme called dihydropteroate synthase which are specific to the metabolic pathway of the bacteria cells for the synthesis of folic acid. This causes the bacteria to stop growing. Together with the actions of the immune system, the bacteriostatic actions of the antibiotics can effectively stop am infection without affecting the host cells.

Answer:

22:- in mitosis stem cells and somatic cells cell division occurs and in meoisis germ cells cell division occurs

23:- at end of mitosis 2 daughter cells formed and meiosis 4 daughter cells formed

24:- in mitosis cells are same and in meiosis cells are different

l know only those questions answers

Answer:

Explanation of previously stated factors resulting in a declining bee population.

Explanation:

The user should submit further information on why the bee population is declining. My personal recommendation would be to introduce a reason and then explain it.

In response to your stated reasoning(s), assuming they are correct, this would be giving information such as:  What can pesticides do to bees? What are some statistics showing habitat destruction. What do bees need to be nourished?

I would not recommend ending your answer with "and more".

By submitting this answer and referring to the work and resources given I trust you're in accordance with the Brainly Honor Code and I take no responsibility for any laws or rules broken with you using this platform.

Answer:

National Geographic Logo - HomeSKIP TO CONTENT

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ANIMALSPHOTO ARK

Grizzly bear

Grizzly bears once lived across much of western North America until European settlements and aggressive hunting eliminated most of the population.

PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK

COMMON NAME: Grizzly bears

SCIENTIFIC NAME: Ursus arctos horribilis

TYPE: Mammals

DIET: Omnivore

AVERAGE LIFE SPAN IN THE WILD: 25 years

SIZE: Five to eight feet

WEIGHT: 800 pounds

SIZE RELATIVE TO A 6-FT MAN:

IUCN RED LIST STATUS:? Least concern

LC

NT

VU

EN

CR

EW

EX

LEAST CONCERN

EXTINCT

CURRENT POPULATION TREND: Stable

What is the grizzly bear?

The grizzly bear is a North American subspecies of the brown bear. Grizzlies are typically brown, though their fur can appear to be white-tipped, or grizzled, lending them their name. Grizzly bears are protected by law in the continental United States—not in Alaska—though there have been some controversial attempts to remove those protections in recent years.

I don't have access to your model, although I'm sure it's beautiful. Fortunately, this question can be answered without one.

A strand of DNA is a polymer consisting of monomeric nucleotide units. The nucleotides that are found in DNA are distinguished by their nucleobases: adenine (A), thymine (T), guanine (G), and cytosine (C). Each nucleotide in DNA is made up of a single nucleobase, a sugar (deoxyribose), and a phosphate group. These nucleotides form extremely long chains comprising phosphate-sugar linkages (covalent, phosphodiester bonds).

In native, double-stranded DNA, you have of these chains (or strands) arranged side-by-side such that the nucleobases on one chain are faced directly across corresponding nucleobases on the other chain, which enables hydrogen bonding between the bases.

There is a "rule" regarding which bases form hydrogen bonds with one another (Chargaff's rule): adenine with thymine and guanine with cytosine.

What does this have to do with the width of the DNA molecule?

The four nucleotides can be structurally classified into two categories: pyrimidines and purines. For our purposes, we only need to know that pyrimidines are six-membered rings and purines are a fusion of a six- and five-membered ring (basically, purines are pyrimidines attached to a five-membered ring). Thymine and cytosine are pyrimidines, and adenine and guanine are purines.

So, geometrically, adenine and guanine are larger (and, thus, "wider") than thymine and cytosine since adenine and guanine contain an extra ring. But remember our base-pairing rules: In native DNA, adenine (two rings) on one strand pairs up with thymine (one ring) on the other strand, and guanine (two rings) pairs up with cytosine (one ring) on the other strand.

Because there's a 1:1 ratio between A:T and G:C in double-stranded DNA, the DNA molecule consists of complementary base pairs that, in any given composition of, has equivalent widths. Put simply, the A=T pair has the same width as a G≡C pair because both base pairs are between one pyrimidine and one purine.

DNA (Deoxyribonucleic acid) is composed of four nucleotides, namely, adenine, guanine, cytosine, and thymine.

Thus, the relative pairing of the purine and pyrimidine with each other keeps the width of the DNA constant.

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