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Ivahew [28]
3 years ago
7

Sixty-five million years ago, according to some scientists, an asteroid bigger than mount everest slammed into north america, wh

ich, causing plant and animal extinctions, marksthe end of the geologic era known as the cretaceous period.
Biology
1 answer:
julsineya [31]3 years ago
8 0
That affirmation is correct.


Further information:

It is estimated that about 3/4 of all species where extinct.
This event gave way to the Cenozoic era, which is the one we live in today.

Hope it helped,

Happy homework/  study/ exam!
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What do the endoplas<br> mic reticulum and Golgi body have in common?
posledela

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Brainliest pls

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2 years ago
Male northern elephant seals (Mirounga angustirostris) compete with one another for territories along the beach and defend these
lorasvet [3.4K]

Options:

A. when the female is swimming to the beach

B. when the female lands on the beach and chooses her resting location

C. when the male defends his group of females against a different male

D. when the male mates with a female within his group

E. when the female leaves the beach after mating with a male

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when the female lands on the beach and chooses her resting location is the best and most appropriate time for intersexual selection to occur in the Elephant Seals.

3 0
3 years ago
construct an argument giving scientific reasons to compare the advantages and disadvantages of gene therapy over the use of drug
Darya [45]

Explanation:

advantages - more effective and therefore a higher chance of success. since a genome is usually produced prior to procedure, risks and allergic reactions can be reduced effectively. little to no side effects are noticed as a genome analysis is done before. often the problem can be solved from the root in gene therapy.

disadvantages - ethical issues as often people are not comfortable in genome analysis. can be too expensive as gene therapy requires advanced technology. in the case of using radioactive elements, it may lead to mutations that may be a bigger issue than the disease itself.

hope it helps. :)

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