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Lesechka [4]
3 years ago
15

Amphibians have internal fertilization that requires the presence of water. true or false

Biology
1 answer:
BaLLatris [955]3 years ago
5 0
False. Amphibians like frogs reproduce sexually like mammals. Where's organisms like the hydra reproduce by budding and organisms like the sea anemone, use water to carry their sperm and eggs.
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Answer: B

Explanation: The other answers are talking about similarities among different species.

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Which types of mutations in the lac operon stop Escherichia coli from utilizing lactose as a carbon source? a) promoter deletion
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Answer:

D.) repressor DNA-binding site mutation

Explanation:

lacl prevents the repressor polypeptide is a mutant that prevent operon from binding lactose, and thus will bind to the operator and be non-inducible.. This mutant will represses the lac operon whether lactose is present or not and the lac operon will not be expressed. It is also called“super-supperesor".

The lacI locus – One type of mutant allele of lacI (callled I-) prevents the production of a repressor polypeptide or produces a polypeptide that will not allow to bind to the operator sequence.

This is also a constitutive expresser of the lac operon because absence of repressor binding permits transcription.

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Answer:

<u><em>How can you tell from a food web which organisms will have the greatest biomass?</em></u>

The tropic level contains the greatest biomass in most ecosystems is producers. This occurs because producers get their energy from the sun, the sun is the most available resource, so there are the most at that level.

Explanation:

I hope that this answer has helped you to more thoroughly understand your question asked. If you have any further questions, please do not hesitate to ask them below.

Have a great rest of your day/night!

7 0
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Importance of platyhelminthesis​
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3 0
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What is the Guttenberg Bible?
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Hope this helps!
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