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Step2247 [10]
2 years ago
9

A cell membrane is semi-permeable. What does that mean?

Biology
2 answers:
Nataly_w [17]2 years ago
7 0
C. It lets certain things in
Lady_Fox [76]2 years ago
3 0

Answer:

C

Explanation:

Semi-permeable  means it lets particular things in. It is also called a selectively permeable membrane

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Express this sense sequence as a polypeptide. Use the three letter abbreviation and separate the amino acids with a dash - e.g.
jek_recluse [69]

Answer:

- Protein sequence: Met-Pro-Gly-Lys-Ile-Arg-Arg-Pro-Pro-Gly-Thr-Pro-Leu-Phe-Gly-Lys-*

- DNA 5' UTR: ATTTTAGCC

- RNA 3' UTR: UAAAAAUAAAAU

Explanation:

Transcription is the process in which a DNA sequence (e.g., a gene) is used as template (transcribed) in order to synthesize an RNA molecule, usually a messenger RNA molecule, which is then used as template to produce a polypeptide sequence (protein) in the ribosomes. In RNA, Thymine (T) bases are always replaced by Uracil (U) bases. An mRNA strand is formed in the 5′ to 3′ direction. Each triplet of nucleotides is referred to as a codon and the resulting mRNA strand is translated starting from codon AUG (Methionine), while there are three different stop codons or 'or termination codons' in the genetic code that terminate translation: UAG, UAA, and UGA.

3 0
3 years ago
Why mosquito is called vector for malaria?
vovangra [49]

Only certain species ofmosquitoes of the Anopheles genus—and only females of those species—can transmitmalaria. Malaria is caused by a one-celled parasite called a Plasmodium. Female Anopheles mosquitoespick up the parasite from infected people when they bite to obtain blood needed to nurture their eggs.

8 0
3 years ago
What type of power does this structure produce?
Harlamova29_29 [7]

Answer:

D. Hydroelectric

Explanation:

The given structure is of a dam where Hydroelectricity is produced.

6 0
3 years ago
Read 2 more answers
Earthquakes result from the sudden release of elastic strain energy previously stored in rocks surrounding a zone of fault movem
inna [77]
The answer is true. I hope this helps!
4 0
3 years ago
Read 2 more answers
Consider a hypothetical food chain consisting of grass, rabbits, and foxes. The primary productivity of the grass is 200 units.
STALIN [3.7K]

The maximum amount of energy that we should expect to be recycled from fox trophic level back to the grass trophic level is 0 units.

A food chain describes who eats whom in the wild. Every living thing – from unicellular algae to giant blue whales – needs food to survive. Every food chain is a possible pathway that energy and nutrients can travel through an ecosystem. The primary productivity of the grass is 200 units. There is a 10 fold decrease in the amount of energy units as we move upwards in production chain. So from grass to rabbits we lose energy. The foxes will only really have two units once it's decreased by 10 fold again. The grass does not get any energy from the decaying bodies of foxes, they get the minerals that they need to grow.  And so the correct answer to this question is 0 units because when the energy gets recycled from fox trophic level back to the grass trophic level it will be totally reduced.

Note: The question seems to be incomplete. So the complete question is "Consider a hypothetical food chain consisting of grass, rabbits, and foxes. The primary productivity of the grass is 200 units. What is the maximum amount of energy that we should expect to be recycled from the fox trophic level back to the grass trophic level? Answer choices: A) 0 units B) 0.2 units C) 2 units D) 20 units"

Learn more about food chain on:

brainly.com/question/16065961

#SPJ4

4 0
2 years ago
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