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beks73 [17]
2 years ago
7

How many MYA was the mass extinction of dinosaurs, ammonoids, and many land plants?

Biology
1 answer:
ira [324]2 years ago
6 0
The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary (K–T) extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago.
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In three to five sentences, construct an argument for the claim that natural selection leads to evolution. Provide evidence for
AVprozaik [17]

Answer:

Natural selection leads to evolution due to the way reproduction works. In the example of European moths during the industrial revolution, we can see this clearly. When the industrial revolution was going, there was more pollution, hence darkening the skies and leaving ash. Moths, which before were white with occasional black spots dominated the area until pollution effected their environment. Whiter moths were eaten by bird who could easily see them against the black trees and skies. These moths could no longer reproduce, they were dead. Moths with more black could survive longer to reproduce because they were harder to see. As time went along, the moths turned mostly black, showing an example of evolution.

7 0
2 years ago
Can you please answer the question shown in this picture?
Vesna [10]

Answer:

1) NH3->Product

2)  NH4->Reactant

Explanation:

Reactants are the substances in with you start the chemical reaction with (before the arrow)

Products are the result (after the arrow)

6 0
3 years ago
How do decomposition and synthesis reactions work
Step2247 [10]

Answer:

Because those chemical reactions help the cell to dispose useless substance after they are used and synthetize substance they need or the body needs through them.

Explanation:

Hello.

In this case, since the overall processes inside the cell are constantly producing and getting rid of several substances such as nutrients, proteins, lipids and other, we can say that decomposition reactions serve as a mechanism that the cell uses in order to obtain energy or dispose a substance that is no longer important for it. Moreover, since the cell is the fundamental part wherein the most of the useful substances the body needs are synthetized, we can infer that synthesis reactions must occur in order to allow the body to perform lots of functions, for instance, proteins associated to the hair or nails growing are synthetized inside the cell via the protein synthesis mechanism.

Best regards.

6 0
3 years ago
There are little birds that spend a great deal of time on the back of a rhinoceros and eat the blood sucking ticks out of the rh
djverab [1.8K]

Answer:

1. b

2. c

3. d

Explanation:

7 0
3 years ago
What is a chromatid?
In-s [12.5K]
Each of the two threadlike strands into which a chromosome. Each contains a double helix of DNA.
7 0
3 years ago
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