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katen-ka-za [31]
3 years ago
12

Human body Systems Interactions

Biology
1 answer:
natulia [17]3 years ago
6 0

Answer:

Hello,

1. Respiratory system, immune system

2. Muscular system, renal system

3. autonomic nervous system, muscular system

4. nervous system, visual system

5. The body systems that are responsible for providing oxygen to the different cells in the system are the respiratory system and the circulatory system. The first provides the second with oxygen, and then the second goes out to carry that oxygen through blood streams throughout the whole body.

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If you cross a mule and a horse, you get a donkey. How many chromosomes does a donkey have?
madreJ [45]

Answer:

62

Explanation:

31 pairs

A mule is the offspring of a male donkey (a jack) and a female horse (a mare). A horse has 64 chromosomes, and a donkey has 62. The mule ends up with 63. Mules can be either male or female, but, because of the odd number of chromosomes, they can't reproduce.

3 0
4 years ago
A gene on human chromosome 15 is expressed throughout the body. However, in the brain, only the maternal copy of the gene is exp
lord [1]

Answer:

C) Through genomic imprinting, methylation regulates expression of the paternal copy of the gene in the brain.

Explanation:

The pattern of gene expression wherein either paternal or maternal gene is expressed in specific cells while the other one is prevented from expression is known as genomic imprinting.

In the given example, the maternal copy of the gene on chromosome 15 is expressed in brain cells while its paternal copy is not expressed in these cells. Hence, the pattern of expression of this gene is regulated through genome imprinting. One of the mechanism is methylation of cytidine residues of CpG islands of the DNA that are more frequently present within promoters of the genes.

When the cytidine residues of these sequences are methylated into 5-methylcytidine, the transcription factors do not bind to these promoters preventing the expression of these genes.

Hence, methylation of cytidine residue in CpG islands of the promoters of the gene present on chromosome 15 could have silenced its expression in brain cells.

6 0
3 years ago
Choose the best statement.
Vikentia [17]

Answer:

if im not mistaken the answer should be the first one

7 0
3 years ago
During what energy from the sun is stored in the bonds of sugar molecules
Dimas [21]
The energy<span> from </span>sunlight is stored<span> in the chemical bonds of </span>molecules<span>. ..... </span>during<span> day, CO2 slowly used to make glucose while stomata are closed ... purpose is to produce ATP(</span>energy stored<span> in chemical </span>bonds of sugar<span>) and breakdown.</span>
8 0
3 years ago
The diagram shows the structure of an animal cell.
quester [9]

Answer:

4

Explanation:

Number 4 is the cytoplasm.

5 0
3 years ago
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