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Gwar [14]
3 years ago
8

What happened during the Cambrian explosion

Biology
1 answer:
vovangra [49]3 years ago
4 0
The Cambrian period was important because it marked a dramatic burst of evolutionary changes in life on Earth. I<span>t is also the time when most of the major groups of animals first appeared in fossil records.</span>
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Which of these disorders is an open sore on the lining of the digestive tract?
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Answer:

your answer is letter D or ulcer

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2 years ago
How is density a source for deep ocean currents? HELP ASAP WILL MARK BRAINLIEST!!!!
Artyom0805 [142]

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Explanation:

5 0
2 years ago
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Why can't more than one sperm enter an egg?
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3 0
3 years ago
A bacterial sample has a cell density of 1.85 x106 CFU/mL. What plate dilution should yield a countable plate? Which two dilutio
insens350 [35]

Answer:

Explanation:

Bacterial count in stock- 1.85x10^6 cfu/ml

Dilution methods

Take 100 uL or (0.1ml) from stock and add to 900ul (0.9ml) saline and mixed it- this makes 10^1dilution.

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Then take 100ul from 10^ 4 and 10^5 dilution seperately and plate on LB agar plate seperetely and count the colonies.

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So suppose, 18 colonies formed on 10^4 dilution then total no. Of cells in stock will be 18x10^4/ 0.1= 18x10^5 cfu/ml.

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3 years ago
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fgiga [73]
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3 years ago
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