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BartSMP [9]
3 years ago
13

The law of segregation tells us that the rearrangement of chromosomes into gametes is​

Biology
1 answer:
SVETLANKA909090 [29]3 years ago
4 0

Answer:

random

Explanation:

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Why is the genetic code common to all organisms?
Virty [35]
It is common to all organisms because all organisms evolved from the same ancestor over a large period of time and these ancestors shared a genetic code.
6 0
3 years ago
Please help me as soon as possible!!!!
antiseptic1488 [7]

Answer:

The answers are:

Cell Wall:

  1. Gives plant cell its shape
  2. Rigid

Cell Membrane:

  1. Acts like a skin.
  2. More selectively controls what goes in and out of cell.
  3. Is not rigid.

Explanation:

  • The question entails the structural and functional differences of the cell wall and cell membrane.
  • The cell wall is a rigid and strong layer that covers the outside of plant cells. It is absent in animal cells.
  • The cell wall is largely composed of cellulose, hemicellulose and pectin in plants and peptidoglycan in bacteria. The cell membrane, on the other hand, is comprised of a lipid bilayer.
  • The strong and complex network of cellulose renders the cell wall rigid; whereas, as it is made up of lipid bilayer, the cell membrane is flexible and elastic.
  • Unlike the cell membrane, which allows the movement of selective substances, the cell wall does not allow any substances to pass through.
4 0
3 years ago
All of the following are differences in transcription, RNA processing, and translation between prokaryotes and eukaryotes except
Mazyrski [523]

Answer:

the mRNA goes through extensive modifications such as addition of a poly tail and a 5' cap in eukaryotes but not in prokaryotes.

Differences:

- the promoters in prokaryotes have a -35 and -10 box while in eukaryotes they are variable but have a TATA box from  

- the transcription initiation site there is a single RNA polymerase in prokaryotes while eukaryotes have multiple RNA polymerases

- the sigma factor associates with the promoter region in prokaryotes but in eukaryotes there are many basal transcription factors

Explanation:

Ribosomal and transfer RNAs are processed both in prokaryotic and eukaryotic organisms. However, mRNA is only processed in eukaryotes. In eukaryotic cells, mRNA processing involves:

1. Capping at the 5' end. This process has several functions including regulation of nuclear export, prevention of eukaryotic mRNA degradation and promotion of translation.

2. Splicing in order to remove introns and conserve coding exons. Splicing helps to increase the diversity of the eukaryotic mRNAs (and therefore eukaryotic proteins)

3. Polyadenylation by the addition of a poly(A) tail at the 3' end. The poly(A) tail makes the eukaryotic mRNA molecule more stable and also prevents its degradation by exonucleases.

8 0
3 years ago
A remora hitching a ride on the shark is an example of which symbiotic relationship? A. Predator/prey B. Mutualism C. Parasitism
Lelechka [254]

Answer:

D. Commensalism

Explanation:

The relationship between a remora and a shark is an example of commensalism - it's good for one side but neither good nor bad for the other. The remora attaches itself to the shark and gets the benefit of eating the shark's leftovers, but there is no harm or benefit for the shark, and the shark doesn't eat the remora like in a predator/prey relationship.

6 0
3 years ago
Plasmodial slime molds are characterized by:
Irina-Kira [14]

Answer:

a,the ability to go from a single cell to multicellular organism

5 0
2 years ago
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