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Iteru [2.4K]
3 years ago
13

The __________ are primarily responsible for maintaining the salinity of the renal medulla versus the renal cortex.

Biology
1 answer:
Yuki888 [10]3 years ago
5 0
I forgot and have the same problem
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A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive more
LuckyWell [14K]

Answer:

picky and typical selection.

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7 0
3 years ago
HELP QUICK-Which of the following is true regarding the atoms involved in a chemical reaction?
NeTakaya

Answer:

The same number of each type of atom will always be present before and after a chemical reaction takes place.

Explanation:

8 0
3 years ago
Sarah wants to know which brand of nail polish lasts the longest without chipping.She buys 4 types of nail polish - Essie (which
son4ous [18]

Answer:

Different brands of nail polishes used by Sarah.

Explanation:

While conducting an experiment two different variables are considered namely dependant variable and independent variable. The variable which is continuously changed to see the effects is called as independent variable and the variable which is being tested is called as dependant variable.

In the given scenario, Sarah want to know best brand of nail polishes which lasts longest without chipping. Thus the different brands of nail polish used by her is considered as independent variable.

7 0
3 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
Njfuchehe lolnsudbdndnxj jfhf
kumpel [21]

Answer:

xvdccbvcbnvndnfgxcgfbfngf

Explanation:

3 0
3 years ago
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