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Virty [35]
3 years ago
14

What marks the boundary between the mesozoic and the cenozoic (called the k-t boundary)?

Biology
1 answer:
VikaD [51]3 years ago
7 0
The Cretaceous mass elimination denotes the limit between the Mesozoic and Cenozoic times. It was a mass termination of some seventy-five percent of the plant and creature species on Earth that happened over a topographically brief timeframe for more than 66 million years. 
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The fatal human illness called Huntington disease is caused by a dominant mutant allele. Calculate the probability that a couple
BaLLatris [955]

Answer: There is a 50% chance that the offspring will inherit Huntington's disease

Explanation:

Huntington's disease is expressed by a dominant allele.

Since the father is heterozygous for Huntington's disease, his genotype would be as follows:Hh

Even though he carries a normal allele, the dominant allele is disease causing and thus masks the effects of the normal allele, therefore he expresses the disease.

The mother does not have Huntington's because she is homozygous recessive, in other words, she carries 2 copies of the normal alleles.with the genotype hh.

If you do a punnet square, and you cross the mother and father, the following genotypes can be produced:

Hh, Hh, hh, hh

Therefore, there's a 50% chance that the offspring will inherit the disease causing allele and 50% chance that the offspring will not inherit it.

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3 years ago
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kolezko [41]

Answer:

rotation at the same time

Explanation:

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3 years ago
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polet [3.4K]

Answer:

not 100% sure but my answer would be T F T T F F F F T T

Explanation:

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3 years ago
A plasma membrane and a cell wall _____.
FinnZ [79.3K]

The only thing I know is that they have different structures but do the same thing, so their function would be the same. I hope this helps. If not, then let me know and I will do the best that I can. Have a great day!!

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Which are the four most abundant components of the atmosphere? Taken together, about what percent of the atmosphere do these fou
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The most abundant in the atmosphere are Nitrogen, Oxygen, Argon, and Carbon Dioxide. All of these combined take up about 99.9% of the Earths atmosphere

Hope this helped!! :D
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