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Margaret [11]
3 years ago
7

All substances that enter or leave a cell must cross the cell _____

Biology
2 answers:
pychu [463]3 years ago
8 0

Answer:

Cell membrane

Explanation:

Hope it helps

Fudgin [204]3 years ago
6 0

all substance that enter or leave a cell must cross the cell cells membrane

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9. Outline the phases of the menstrual cycle, or the period in woman. please this should be at least 150 words. I will mark as B
Vinil7 [7]

The menstrual cycle is complex and controlled by many different glands and the hormones that these glands produce.

The four(4) phases of the menstrual cycle are:

(1) menstruation.

(2) the follicular phase.

(3) ovulation .

(4)the luteal phase.

Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS).

8 0
3 years ago
A color-blind (X-linked recessive) human with Klinefelter syndrome has parents both of whom have normal color vision. 4a. From w
sineoko [7]

The extra X chromosome is received from mother.

<h3><u>Explanation</u>:</h3>

Klinefelter's syndrome is the condition of chromosomal aberration where the person has an extra X chromosome. This means the genotype of the person is 44+XXY and the total chromosome number is 47. This condition is achieved due to inappropriate meiotic division and one of the sperm or ovum has the an extra X chromosome.

Here both the parents are normal in terms of colour vision. So the father cannot have the gene of colour blindness because if it was present, then father would have been colour blind because he has only one X chromosome per cell. So its present in mother who is heterozygous in terms of colour blind gene. So the extra X chromosome also came from her which made the presence of two defective X chromosomes in the offspring and made it colour blind.

5 0
3 years ago
I need help on #13 please
eimsori [14]
Earthquakes occur along faults because they're under pressure.
Faults are cracks in the Earth where the tectonic plates are moving in different directions, thus there is a pressure.
4 0
3 years ago
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Scientific Method<br> Explain why there is not just one scientific<br> method or process:
Inga [223]

Answer:

Some versions have more steps, while others may have only a few. However, they all begin with the identification of a problem or a question to be answered based on observations of the world around us.

Explanation:

please give brainliest

3 0
2 years ago
What types of organisms will be affected by a decreased supply of water in an ecosystem?
Delvig [45]
"Producers, consumers, and decomposers will be affected" is the one among the following choices given in the question that will be the <span>types of organisms that will be affected by a decreased supply of water in an ecosystem. The correct option among all the options that are given in the question is option "a". </span>
4 0
3 years ago
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