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STatiana [176]
3 years ago
15

Explain why sponges and cnidarians were the first animals to evolve

Biology
2 answers:
malfutka [58]3 years ago
6 0
Once the Earth was full of water (ocean) after volcanic activities the mainland became land ( sorry about my english i am hungarian and i am still learning the language )
alisha [4.7K]3 years ago
5 0
Sponges and cnidarians were the first animals to evolve from a multicellular ancestor. The oldest fossil evidence of multi-cellular animals is burrows that appear to have been made by smooth, worm like organisms. Between 620 and 550 million years ago large, complex, soft-bodied multi-cellular animals appear in the fossil record.
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What is the current estimate for the total number of species on earth, and why is it so hard to get an accurate count?
Kamila [148]
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The reason why it is hard to get an accurate count is because some species are very hard to find reason being that of nocturnal habits, location, and the size.

All the species which have ever lived on earth are being estimated to be extinct. It is approximately one extinction for every million species for years. Mammals species like typically persist for one million years.</span>
7 0
3 years ago
1a)Which of the Pollen grain will most likely fertilise the egg cell in the ovule why?
ivolga24 [154]

Answer:pollen grain

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5 0
3 years ago
Which of the following is not a property of water? ​
astra-53 [7]

Answer: It becomes more dense when it freezes.

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4 0
2 years ago
Paramecium was found to occupy 20% of the FOV of a microscope at 40X magnification power. How many paramecium can be accommodate
lana [24]

5 Paramecium could be accommodated in this FOV.

Explanation:

FOV refers to the field of view of the microscope.

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If a single paramecium occupies 20 % of the Entire FOV.

Then the number of paramecium that will be accomodate 100% of FOV will be given by ,

\frac{100}{20} = 5 Paramecium.

which is equal to 5.

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3 years ago
True/False. All mutations are bad.​
olchik [2.2K]

False.

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I hope this helps! :)

4 0
2 years ago
Read 2 more answers
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