3 years ago

What important event in animal evolution marks the beginning of the Cambrian period?

1 answer:

3 0

The appearance of fossils would the the answer.

Although there has been some scientific debate about what fossil strata should mark the beginning of this period, the "International Geological Congress" determined that the Cambrian period was approximately 543 million years ago of which the first appearance in the fossil record of worms that made horizontal burrows was discovered.

You might be interested in

I got scammed last time I asked can you guys help me now pls She/They

Vlad [161]

I believe it’s the Vulture but im not completely sure sorry if this is wrong :(

4 0

2 years ago

Which of the following shows the importance of incoming solar energy for life on earth?

Vladimir [108]

The answer is A cuz a food chain starts with solar energy

3 0

3 years ago

Which chromosome contains sex-linked genes? A) X B) Y

Brrunno [24]

Answer: B
Explanation: Most mammals have only one pair of sex chromosomes in each cell. Males have only one Y chromosome and one X chromosome, while females have two X chromosomes. In Mammals, the Y chromosome contains a gene, SRY, which triggers embryonic development in a male.

Hope this helps!

4 0

3 years ago

Read 2 more answers

Radiation that is redshifted has the peaks of its waves

drek231 [11]

Answer:

with more energy

Explanation:

8 0

2 years ago

Read 2 more answers

Billy thinks evolution is slow and continuous. He believes in