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slega [8]
3 years ago
6

Another page... really need help ASAP

Biology
1 answer:
myrzilka [38]3 years ago
8 0

18) Cell B to cell A because the receptors of cell A are able to recognize the signals from cell B (signal 1). (3)

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Which three statements correctly describe the endoplasmic reticulum?
Sunny_sXe [5.5K]

I have searched everywhere, but I have not found the proposals of the question, but I will explain to you what is the endoplasmic reticulum so that you can answer it.

The endoplasmic reticulum is a eukaryotic organelle located in the cytoplasm.

The endoplasmic reticulum is a network of membrane tubules (often interconnected) scattered throughout the cytoplasm of eukaryotic cells. Its membrane, which alone represents more than half of the cellular membrane system, is in contact with the nuclear envelope.

The endoplasmic reticulum can be:

Granular (or rough) (RER) that is to say associated with ribosomes.

Smooth (SER).

The granular endoplasmic reticulum is the place of synthesis (in the associated ribosomes) of the proteins secreted outside the cell and of the proteins and lipids constituting the membranes of the cellular organelles. Golgi, lysosomes, mitochondria, nucleus, ribosomes, vesicles ...). It participates in the correct folding of the proteins that have just been synthesized.

The smooth endoplasmic reticulum participates in cellular metabolism, synthesizing lipids and storing calcium.

5 0
3 years ago
How many chromosomes are there in human ovum​
denis-greek [22]

Answer:

23 chromosomes

Unlike all the other cells in a human body which are diploid, human sex cells are haploid. That means that both sperm cells and ova are haploid; containing only 23 chromosomes.

Explanation:

have a good day!

(─‿─)

7 0
3 years ago
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How can you tell the difference between the different phases of mitosis each cell is in?
sineoko [7]
I found this photo, i hope it helps

7 0
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What did Mendel observed when he
Katarina [22]

Answer:

Green was dominant over yellow. So they were all green if you are talking about the first generation. The second generation would be a mix

Explanation:

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What instrument was essential to the development of the cell theory?
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I would say the microscope....................
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