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iren [92.7K]
3 years ago
12

Name one reason scientists believe that all life evolved from a single common ancestor.

Biology
1 answer:
xz_007 [3.2K]3 years ago
7 0
Charles Darwin. He is a biologist most know for his theory of evolution and the process of natural selection. 
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2. What nonrenewable resource is formed in regions close to the vent?
IrinaVladis [17]

Answer:

Like hot springs and geysers on land, hydrothermal vents form in volcanically active areas—often on mid-ocean ridges, where Earth's tectonic plates are spreading apart and where magma wells up to the surface or close beneath the seafloor.

4 0
3 years ago
A virus is a cellular agent that possesses membrane-bound organelles. True or false
Anika [276]

Answer:

it is false because virus destroy the cellular agent.

7 0
1 year ago
Describe how oxygen gas (O2) is produced during photosynthesis. Include the specific structures in the plant where the reaction
Dmitriy789 [7]

Answer:

See the answer below

Explanation:

Oxygen gas is produced during photosynthesis by photolysis of water in the chloroplasts of algae and green plants and in the thylakoid of cyanobacteria. The chlorophyll of photosystem II absorbs light energy which leads to the excitation and knocking out of an electron within the photosystem.

The energy released as a result of returning the electrons to the ground state in an acceptor molecule is used in splitting water molecules into hydrogen and oxygen. The electron released from the splitting of water replaces the one knocked out from the photosystem II while oxygen atoms from two water molecules combine to form diatomic oxygen which is later released as oxygen gas.

The whole process of photolysis of water and the release of oxygen gas happens during the light-dependent reaction of photosynthesis.

6 0
3 years ago
When a cell divides into two identical cells, what are these cells called
gtnhenbr [62]
This cell division is called mitosis, and it takes place during the last four phases of the cell life cycle: Prophase,Metaphase, Anaphase, and Telophase. The purpose of mitosis is to copy the genetic material so that whenTelophase has ended, the result is two genetically identical cells.
5 0
3 years ago
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What type of dominance is a blending of the two alleles to make a phenotype somewhere between the parent’s phenotypes? a incompl
jekas [21]

Answer:

A. Incomplete dominance.

Explanation:

Incomplete dominance is the ability of two alleles to produce a heterozygous phenotype different from the two homozygous phenotypes.

Example is when a pure stock of red flowered (RR) four o'clock plant is been crossed with a white flowered(rr) one, the offspring are all pink flowered(Rr), showing a blending of flower colour character. Self pollination of the pink flowered F1 individual produce a mixture of F2 individual bearing red, pink and white flowers in the ratio of 1:2:1. This reappearance of the red flowered and white flowered forms in the F2 generation shows that alleles R and r have remained unaltered in the F1 generation.

4 0
4 years ago
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