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LenKa [72]
3 years ago
5

Explain the term "molecular clock" and describe the types of measurements and comparisons that can be made with this type of clo

ck. Be sure to answer this question in paragraph form using complete sentences.
Biology
1 answer:
arsen [322]3 years ago
5 0

Answer:

In biology, a molecular clock can be described as a method to determine the time for the divergence of species which occurred by the process of evolution.

Explanation:

The mutation rates of different molecules are used in this method. The mutation rates for DNA sequences and amino acid sequences are usually considered. The molecular clock can be used to compare and estimate the splitting of a lineage. For example, by this method, one can interpret when the chimpanzees and humans diverged from each other.

Hope this helped!

-Toshino

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Can someone write the first paragraph
Katena32 [7]

Hii!!

The purpose of mitosis is to create two new perfectly identical cells when either there is a need to replace old or damaged cells and to reproduce asexually by making new cells. Some organisms use mitosis to replace body parts. For example starfish replace lost arms by mitosis. Some organisms such as the hydra use mitosis to produce genetically identical offspring.

There are four stages of mitosis: prophase, metaphase, anaphase and telophase.

1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres

2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell)

3) Anaphase: sister chromatids are pulled to opposite poles of the cell

4) Telophase: nuclear envelope reforms, chromosomes unfold into chromatin, cytokinesis can begin

● The order of the stages of mitosis can be remembered using the mnemonic PMAT.

Hope this helps!! if it has pls mark me as the brainliest Xd :D

4 0
2 years ago
Examine the list of cell characteristics. lack nuclei have cell walls have membrane-bound organelles are smaller than eukaryotic
Mazyrski [523]

Answer:

Explanation:

Prokaryotic cells are very simple so they have:

circular chromosome

smaller than eukaryotic cells

lack nuclei

have cell walls

5 0
3 years ago
Why do phospholipids form a bilayer in water
Gre4nikov [31]
Phospholipids will form a bilayer in water because they contain hydrophobic (Water fearing.. in this cause water "hating") tails and hydrophilic heads (water loving). So they form a bilayer to remove the tails from water likewise, this satisfies the hydrophilic heads because they are still exposed to water.
8 0
3 years ago
What is the term that refers to the range of animal and plant species and the genetic variability among those species?
Gemiola [76]

Answer:

Biodervasity.

Explanation:

The term refers to the variety of life on earth.It demonstrates the extent of variation at different levels of species,genetic and ecosystem in a community of organisms.

It not equal in its distribution on earth;but rather varies with the type of ecosystem available and the distribution of biotic and abiotic factors in the ecosystem. For example;

It is highest in the Tropics,due to the species richness and diversity of the region. However, it varies in other ecosystem based on species diversity peculiar to parts of the region .e.g it is highest in the marine ecosystem along the coast of abundant temperature for primary producers.

7 0
2 years ago
Which ofthe follwoig is not a component of nucleotides, the building blocks of dna?
Basile [38]
Sulfhydryl Oxygen group
4 0
3 years ago
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