Diffusion is the movement _____.


of molecules to an area of lower concentration

of molecules through the cytoplasm of a cell

of water through a selectively permeable membrane

of molecules to an area of higher concentration

Segregation describes how pairs of gene variants are separated into reproductive cells

Answer:

Segregation is the separation of allele pairs (different traits of the same gene) during meiosis so that they can transfer specifically to separate gametes.

Explanation:

hope this is helpful! have a wonderful day ! God Bless you and your family <3

Answer:

A molecule is two or more atoms bonded together to form a single chemical entity.

Answer:

I'm not rlly sure but i think the bigger animal ate the smaller one because after  there are no more steps of him (the smallest)

Explanation:

Answer:

flase

Explanation: photosynthiesis is oxygen and carbon dixocide

Answer:

false

Explanation:

The byproduct of photosynthesis is oxygen not nitrogen

Answer:

Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.

Explanation:

I hope this helps :)

The two types of proteins that regulate the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs). These two groups of proteins are responsible for the progress of the cell through various checkpoints.

What are Proteins?

Proteins are made up of hundreds or thousands of smaller units called Amino acids. They are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.

Cyclins regulate the cell cycle only when they are bound to Cdks and become fully active. The Cdk/cyclin complex must be phosphorylated, which further initiates other proteins to be phosphorylated that advances the cell cycle.

Retinoblastoma (Rb), is another group of tumor-suppressor proteins that regulates the cell cycle by monitoring the cell size.

Therefore, there are two types of proteins that regulate the process of the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs).

To learn more about the Cell cycle, refer to the link:

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Answer:

The cell wall provides strength and support to the plant, much like the exoskeleton of an insect or spider (our skeleton is on the inside of our body, rather than on the outside like insects or spiders). The plant cell wall is mainly made up of the carbohydrates molecules cellulose and lignin.

Explanation:

learned this last year

a population is all the populations of different species that live together in the same area is the incorrect one

Answer: A) natural selection

Explanation:

took the test:) hope this helps

Answer:

Heterotrophs

Hope this helps!

Answer:

Damaged DNA causes an increase in the number of mutations in the cell: this is extremely dangerous for the body and in fact this process is at the basis of the birth of cancer cells.

To avoid this, the cell is equipped with some molecular protective systems including the activation of the p53 protein. p53 induces recruitment of DNA damage repair systems and stops cell replication until the damage has been repaired. If the damage cannot be repaired p53 induces cell death through apoptosis

Answer:

Disruptive or Diversifying selection

Explanation:

occurs when natural selection favors both extremes of continuous variation. Over time, the two extreme variations will become more common and the intermediate states will be less common or lost.

Answer: Cell wall

Explanation:

Answer:

Photosynthesis

Explanation:

Answer:

A.Strata

Explanation:

A strata is covering or layers

Answer:

strata

Explanation:

a p e x

Answer:

Blood

vessels (arteries), skin

vessels (arteries), smooth muscular cells, regulate

Answer:

75%

Explanation:

If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow's peak (see figure). A Punnett square can be used to determine all possible genotypic combinations in the parents. A pedigree that depicts a dominantly inherited trait has a few key distinctions.

Answer:

I believe it is either CYP2C9 or CYP2D6 that breaks down cannabis.

All offspring will inherit Ff and Gg and will have flat and green leaves.

B) sexual reproduction

Answer:

Producers make food and energy for themselves, and don't have to waste any energy hunting or scavenging for food. They also reproduce more effortlessly than consumers, and their genetic diversity is also a factor that keeps them abundant and numerous.

Answer:

A and C

Explanation:

A. because when we humans are burning maybe our refuse or garbage it will go up to the ozone layer causing air and then it will then result to carbon dioxide.

I can't be completely accurate without the texts, but based on my own knowledge I would have to say:

Explanation:

Yes, I think communities should use these green energies because not only does it keep the atmosphere safer and cleaner, it could help tremendously in the case that we run out of fossil fuels before we can find an alternative. Yes there are environmental risks, such as birds dying from wind turbines, but the lack of electricity might be more severe.

Answer:

Alfred Hershey and Martha Chase

Explanation:

In 1952 Alfred Hershey and Martha Chase were working with bacteriophages or phages, which are viruses that infect bacteria. They knew that a phage had an outer shell of protein and an inner core of DNA. In addition, from the electron microscope observations, they also knew that during infection the virus attacks the bacterium by its tails and introduces its genetic material into the bacterium to multiply using its metabolic machinery. They radioactively labeled two sets of phages: one with 32P (which marks only DNA) and another with 35S (which marks only proteins). In two parallel experiments, they infected bacteria with viruses marked on their DNA and with viruses marked on their proteins. The cultures were shaken with a mixer to separate the virus particles from the bacterial coatings. They then performed a centrifugation to separate the phages from the bacteria, so that the larger and heavier bacteria remain in the pellet, while the phages remain in the supernatant. They found that the radioactivity of 35S appeared in the supernatant while that of 32P appeared in the sediment, from which new radioactively labeled virus particles appeared, demonstrating that DNA was the genetic material.

Answer:

Yes.

Explanation:

Yes, small plants began to grow along the remaining soil because of the presence of seeds in the soil that sense suitable environmental condition and come out of the soil. The ashes of burn trees have huge amount of nutrients in the form of minerals that triggers the growth of small plants. After the destruction of forest, new plants grow on that land, this type of phenomenon  is called ecological succession.

Answer: CORRECT (SELECTED)

Secondary succession

Explanation:

Secondary succession occurs when a previously occupied area is recolonized after a disturbance kills most, or all, of its community.

The figure C represents Five kingdom classification.

The system of biological kingdoms is the way in which science classifies living things according to their ancestry over the course of evolution.

This means that all the species that make up these five large groups - some recent theories split them further into six or even seven - have common ancestors and therefore share some of their genes and belong to the same family tree.

As well as the kingdoms of living things there are other taxonomic categories within the same classification system such as, for instance, domain, phylum, class, order, family, genus and species.

Therefore, The figure C represents Five kingdom classification.

To learn more about Five kingdom classification, refer to the link:

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Answer:  

1.Radiator

2.Steaming cup of hot tea

3.Ice melting

Explanation:

1.Puts warm air out at the top and draws in cooler air at the bottom.

2.The steam is showing heat being transfered into the air.

3.Heat moves to the ice from the air. This causes the melting from a solid to liquid.

Explanation:

Answer:

b d

Explanation: