Biology help please.......? What is the most important factor that holds a gene pool together and prevents spoliation? a/ Sexual selection b/ Behavioral isolation c/ Gene flow d/ Hybridization

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Answer 1
Answer: The right answer for the question that is being asked and shown above is that: "a/ Sexual selection." the most important factor that holds a gene pool together and prevents spoliation is that of sexual selection. it is part of the process.

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What evolutionary milestone made it possible for more complex, multicellular organisms to exist?

A cross-section of a tree trunk shows 20 dark-colored rings and 20 light-colored rings. What is the likely age of this tree?

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Trees produce 2 colored rings per year and so by counting these rings you can have an idea as to how long the tree has lived. With 20 dark-colored rings and 20 light-colored rings, the tree is likely to have stood up for 20 years. I hope this helps. 
The likely age of a tree that shows 20 light colored rings, and 20 dark colored rings is 20 years old. Each year of a tree's life is represented by a dark and a light part. The type of life that a tree has had can also be learned by looking at the rings. If rings are not even or concentric you can tell that a tree was leaning, or was growing in a windy area. You can also judge the health of a tree by how the rings are spaced.  

What soil particles is the largest

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three categories for soil particles have been established — sand, silt and clay. These three groups are called soil separates. The three groups are divided by their particle size. Clay particles are the smallest, while sand particles are the largest.

A cell can only grow so large in size, becauseA. its ability to exchange materials would happen more quickly as the cell grows.
B. its surface-to-volume ratio decreases as the cell becomes larger.
C. its surface-to-volume ratio decreases as the cell becomes smaller.
D. its ability to exchange materials is affected by a growing surface-to-volume ratio.

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A cell can only grow so large in size because itsability to exchange materials is affected by a growing surface-to-volume ratio.Nature designed cells to be small in size because of the network of membranespassing through it. If cells grow any bigger, membranes in it will not be ableto pass through its different parts and perform their purpose.


A cell is a network composed of many organelles (e.g. mitochondria, nucleus),that communicate and work together to provide bodily functions. The cell issmall so that communication between organelles will be faster and much easier. Whencells are small they can be easily repaired when damaged and replicated whenneeded.

Final answer:

A cell can only grow to a certain size because as it grows, its surface-to-volume ratio decreases, reducing the efficiency of material exchange between the cell and its environment. The larger the cell, the more challenging it is to exchange materials, hence a size limitation.

Explanation:

The reason a cell can only grow so large in size is due to the decrease in its surface-to-volume ratio as the cell becomes larger. This concept, often discussed in biology, refers to the relationship between the surface area of a cell (which determines the amount of substances that can be exchanged with the environment) and its volume (which determines the amount of substances required by the cell).

As the cell grows larger, its volume increases more rapidly than its surface area, reducing the ability of the cell to exchange materials efficiently. Thus, the correct answer is Option B: its surface-to-volume ratio decreases as the cell becomes larger.

Learn more about Cell Size here:

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While dna in a human cell was being replicated, a single base was miscopied. what will most likely be the result for the cell in which it happened?

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Answer:

The options to this question are missing, they are:

A) All the proteins the cell creates from the miscopied strand will do different jobs than the old ones.

B) Any miscopied DNA will be replaced with an accurate DNA copy once the cell divides.

C) Both new DNA strands will end up together in a new cell, and the inaccurate one will be discarded.

D) If the new sequence codes for the same amino acid as the original cell, it will function normally.

THE CORRECT ANSWER IS D

Explanation:

What occured to this cell replicating its DNA is called MUTATION, which is a change (small or big) in the nucleotide sequence of a DNA. The miscopied base will alter the nucleotide sequence of the DNA. Since a single base is involved, it is referred to as a POINT MUTATION.

A point mutation, such as the one in this case, can produce varying effects in the resulting organism. The mutation can either lead to a different protein in that particular sequence the mutation occured or have no effect on the organism.

The mutation will have no effect on the organism in a case where the base that was miscopied produced a codon that codes for the same amino acid as the original codon. Hence, the same protein will be produced and have both effect on the cell. This is possible because of the degenerate nature of the genetic code, as more than one codon codes for a given amino acid.

Mutation I presume ??

2. a) What type of carbohydrate is glucose?



Whats the answer to this?

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The answer is Monosaccharide

Where is the greatest amount of the world’s carbon found?

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   The greatest amount of carbon is found in underwater sediments and sedimentary rocks.

Answer: Seafloor sediments I believe is the correct answer

Explanation:The greatest amount of the worlds carbon is found in oceans.