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lbvjy [14]
3 years ago
10

What is the age of the oldest rock that has been found and dated?

Biology
2 answers:
inna [77]3 years ago
8 0
The answer is actually 4.4 billion years, but i guess you can estimate to 4.5
Oksanka [162]3 years ago
4 0
The answer is D
,....,.,.,.
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What are the 2 main ideas behind natural selection? (will give brainlist!)
ioda

1-Charles Darwin

2-Alfred Russel Wallace

Explanation:

are jointly credited with coming up with the theory of evolution by natural selection, having co-published on it in 1858. Darwin has generally overshadowed Wallace since the publication of On the Origin of Species in 1859, however.

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Which of the following are present in your liver cells?
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Answer: E. All of the above are present in liver cells
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Take a moment to click the start button on the simulation. Let it run for about 1 minute (the clock hand will complete 1 rotatio
Volgvan

Bubbles are observed in the simulation after 1 minute due to the production of oxygen by plants during photosynthesis.

<h3>What is photosynthesis?</h3>

Photosynthesis is the process by which green plants manufacturer their food from carbon dioxide and water using sunlight as am energy source.

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Therefore, in the simulation, bubbles are observed after 1 minute due to the production of oxygen by plants.

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2 years ago
How does the dna repair enzyme photolyase prevent skin cancer?
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A person who has type AB blood and is heterozygous for Rh factor has children with a person who is heterozygous for type A blood
MatroZZZ [7]

Blood type is determined by the alleles coding for the antigen present on cell membranes.

The person with type AB blood has a heterozygous Rh factor.

  • Half the gametes have Rh factor (+) and the other half are negative for Rh factor (-)
  • Half the gametes have IA and the other half have IB
  • The possible gamete combinations are IA+, IA-, IB+, IB-

The person with heterozygous type A blood is negative for Rh factor

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  • Half the gametes have IA and the other half have IO
  • The possible gametes are IA-, IO-

The genotype ratio is 1:1:1:1:1:1:1:1

The phenotype ratio is 2: 2:1:1:1:1.

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#SP10

8 0
2 years ago
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