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lara31 [8.8K]
4 years ago
14

Question 16

Biology
1 answer:
nika2105 [10]4 years ago
5 0

Answer and Explanation:

The Cretaceous–Paleogene extinction, which occurred around 66 million years ago, is defined as a mass extinction that wiped out around three-quarters of species on Earth.

Among the organisms that disappeared during this event, we find mammals, birds, fish, sharks, pterosaurs, birds, reptiles, insects, and some plant species.

This event is marked by the presence of a sediment layer known as the K-Ph boundary which showed important levels of iridium, an element that is abundant in craters. Therefore, after its discovery, scientists hypothesize this extinction occurred due to the impact of the giant Chicxulub crater which changed the conditions of the atmosphere.

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At which COP were countries first required to extend their commitment period​
docker41 [41]

Answer:

The Kyoto Protocol, a landmark environmental treaty that was adopted in 1997 at the COP 3 in Japan, represents the first time nations agreed to legally mandated, country-specific emissions reduction targets.

Explanation:

https://en.m.wikipedia.org/wiki/Kyoto_Protocol

the article where I got the info from, hope this helps

7 0
2 years ago
A farmer raises black and white chickens. To his surprise, when the first generation of eggs hatch all the chickens are black wi
Vedmedyk [2.9K]

Answer:

Option C

Explanation:

Let the allele for black color be "B"

and the allele for white color be "b"

Since after F1 generation all the offspring have black  body with white speckles throughout their feathers.

Thus the allele for black and white show co dominance.

Genotype of parent after F1 generation would be Bb for speckled chickens

Cross between two specked adults will produce -

Bb x Bb

BB, Bb, Bb, bb

Out of four offspring 1 is black (BB), 1 is white (bb) and two are speckled (Bb)

Thus 50% of the offspring will be speckled, 25% will be black, and 25% will be white.

Option C is correct

6 0
3 years ago
Hello, What causes the moon to be darkened in the lunar eclipse?
maxonik [38]
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7 0
4 years ago
In a person with a disease in which the mitochondria do not produce enough energy for the cell, which organs would be the most s
erastova [34]

The heart would be one of the most affected organs if the mitochondria do not produce enough energy, since this organ requires a lot of energy, so any supply failure leads to heart failure and contraction failure.

<h3>What are mitochondria?</h3>

They are the cellular structures responsible for supplying most of the energy necessary for cellular activity.

<h3>Characteristics of mitochondria</h3>

  • They produce energy from the metabolism of organic fuels such as sugars, lipids (fatty acids) and amino acids.

  • Insufficient energy production by the mitochondria causes dilated cardiomyopathy, where the heart undergoes significant dilation and loses the force of contraction.

Therefore, we can conclude that a defect in a mitochondrial process involved in energy production would affect heart cells causing dilated cardiomyopathy, heart failure.

Learn more about mitochondria here: brainly.com/question/11674727

4 0
3 years ago
Alan observed that a lot of soil from his garden swept off from after heavy rain. Which is this process called?
antoniya [11.8K]

The answer is D. Surface Runoff.

5 0
3 years ago
Read 2 more answers
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