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xenn [34]
3 years ago
5

The Cretaceous-Paleogene was a mass extinction event in which nearly every single large, land-dwelling dinosaur went extinct. Wh

ich of the following did not result from this extinction event?
A.
Diverse species of animals began to evolve.
B.
Meteorites struck the region that Mexico now occupies.
C.
Clouds of dust and gas billowed into Earth's atmosphere.
D.
Ecological niches were left empty but with the potential to be filled.

​
Biology
1 answer:
svp [43]3 years ago
7 0

Answer:

B. Meteorites struck the region that Mexico now occupies

Explanation:

The meteorite or comet that struck in the area where Mexico is located in the present is not part of the consequences of the extinctions event. The reason why it is not part of the consequences is that it is the factor that caused the consequences, so it can not be both the thing that caused something and also the consequence of it. This meteorite or comet managed to create such a huge explosion, that it managed to wipe out pretty much all large and medium sized land dwelling animals. And that was not caused only by the explosion itself, but also because it drastically changed the climate with the huge amounts of ashes and dust released into the atmosphere, as well as the triggering of the volcanoes around the world. This mass extinction though opened up the gates for the evolution of the mammals which soon became the dominant animals on the planet.

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As part of maintaining homeostasis, why are hormones, secreted by endocrine cells, continuously inactivated?
IceJOKER [234]

Answer:

Homeostasis refer to as the maintainence of equillibrium within the body. Endocrine systems play a major role in maintainence of equillibrium. The hormones released are continuously inactivated by negative feeback system to maintain homeostsis.

Explanation:

Homeostasis in a body is refered as a dynamic equillibrium which constantly changes. Feedback regulation systems maintain homeosatsis.

The release of hormones into the blood is controlled by a stimulus. A stimulus can increase or decrease the release of hormones.The response to a stimulus changes the internal conditions and may itself become a new stimulus. This self-adjusting mechanism is called feedback regulation.

There are two types of feedback systems.

Negative feedback occurs when the response to a stimulus reduces the original stimulus. Positive feedback occurs when the response to a stimulus increases the original stimulus.

If the hormones released are not controlled by these feedback systems, enormous amount of hormones will change the whole internal enviornment of the body ,hence, equillibrium will be disturbed and result in death of cells and death of an indivisual.

8 0
3 years ago
Common rosefinches arrived in Hawaii roughly 6 to 7 million years ago and have since evolved into at least 56 new species of hon
nika2105 [10]

Answer:

A. Some speculate that they were blown out to the islands by a massive storm

Explanation:

The common rosefinches are thought to have arrived on the Hawaii islands between 6 and 7 million years ago. As the common rosefinches are not big birds and they can not fly over very long distances, the scientists believe that it is a massive storm that blow some individuals to the Hawaii islands. This is nothing weird, as it has been witnessed numerous times how massive storms manage to carry some smaller birds to places where they are not able to fly on their own. Once there, the birds encountered suitable conditions for living and lot of open niches in the food chain. This resulted in quick diversification of the common rosefinches, with members of the species gradually adapting to a particular niche, experiencing changes to be more competent, and creating numerous new species after some time.

5 0
4 years ago
How much of the solar energy that enters the Earth's atmosphere actually reaches the earths surface
Aleksandr [31]

Answer:

51% is absorbed by earth

6 0
3 years ago
Arrange these groups in order from most inclusive (most general) to least inclusive (most specific).
LUCKY_DIMON [66]

These groups are arranged in order from most inclusive (most general) to least inclusive (most specific) is gnathostomes, osteichthyans, lobe-fins, tetrapods, amphibians.

<h3>What is gnathostomes?</h3>

The jawed vertebrates are called gnathostomata. The phrase comes from the Greek words "jaw" and "mouth." Approximately 60,000 species make up the diversity of the gnathostome, which represents 99% of all vertebrates still alive today.

<h3>What is osteichthyans?</h3>

A broad taxonomic group of fish called osteichthyes, also known as the "bony fish," has skeletons that are predominantly made of bone tissue.

<h3>What is lobe-fins?</h3>

The taxon Sarcopterygii, also known as Crossopterygii, is made up of bony fishes noted for having lobe-finned fishes as its members.

<h3>What is tetrapods?</h3>

Four-legged vertebrates that make up the superclass Tetrapoda are known as tetrapods, which derives from the Ancient Greek (tetra-) "four" and "foot." It consists of synapsids, dinosaurs, and extinct as well as living amphibians, reptiles, and dinosaur-related birds (including mammals).

To learn more about Tetrapods visit:

brainly.com/question/15289594

#SPJ4

8 0
2 years ago
Is unicellular eukaryotic or prokaryotic
Nataliya [291]

Answer:

It's Eukaryotic

Explanation:

8 0
3 years ago
Read 2 more answers
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