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Dmitry [639]
3 years ago
11

How do the scrotal muscles help maintain temperature homeostasis of the testis?

Biology
1 answer:
klio [65]3 years ago
7 0
It keeps them out side the body to maintain the correct temperature.
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artcher [175]
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The events listed below are all necessary for homologous recombination to occur properly:
vladimir2022 [97]

Answer:

D) D, B, C, E, A, F

Explanation:

Homologous recombination (HR) is a DNA repair pathway that consists of the exchange between two identical (or very similar) DNA regions. The steps of HR are: 1-Strand exchange, which refers to the pairing between broken DNA regions; 2-Strand invasion in order to provide a DNA crossover (Holliday junction); 3- Branch migration, capable of extending the heteroduplex regions far away from DNA crossover, 4-Resolution, where Holliday junction is resolved by cleavage of the junctions; 5- In the last step, a DNA ligase enables the joining of DNA strands.

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3 years ago
A student made a model of an ecosystem inside a sealed plastic bottle. She
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It illustrates the cycling of matter, just like in a natural ecosystem.

Option D.

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

The natural stable ecosystem is defined as the ecosystem which has the members doing their part of job and each and every member contribute to the stability of the ecosystem by completing food chains.

Here in this bottle ecosystem the boy put the stones, rocks, water which gives proper nutrition to the growing plants and animals which are also introduced by the boy. The plants produce oxygen and consume carbon dioxide whereas the animals consume oxygen and produce carbon dioxide. Thus the cycle is maintained and stability is achieved.

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3 years ago
You are attempting to synthesize rRNA in a test tube using DNA isolated from mouse cells. In addition to the template DNA, ribon
olga55 [171]

Answer:

d. RNA polymerase II.

Explanation:

The main enzyme responsible for RNA synthesis is RNA polymerase, which <em>catalyzes the polymerization of 5'-triphosphate ribonucleosides (NTP) </em>directed by a DNA mold.

Eukaryotic cells contain <u>three types of nuclear RNA polymerases</u> that transcribe different types of genes. Protein-encoding genes are transcribed by RNA polymerase II to give mRNA.

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