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sdas [7]
3 years ago
11

Two systems that send meassages ariund the body

Biology
2 answers:
Trava [24]3 years ago
8 0

Answer:

nervous circulatory

Explanation:

Archy [21]3 years ago
7 0

Answer:

The nervous system and the endocrine (hormone) system. These systems regulate body processes through chemical and electrical signals that pass between cells.

Explanation:

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During photosynthesis, where do the light and dark reactions occur?
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It occurs in the Stroma
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In the taxonomic system, genus is a subdivision of family.<br> True<br> Оr<br> False
leva [86]

Answer:

✔

Explanation:

genus (pl. genera)

in the modern classification system, a subdivision of a family; includes one or more species of organisms

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_____ is required for any type of movement. Diffusion,energy,osmosis,electricity?
Scorpion4ik [409]

The answer is energy
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If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

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3 years ago
Describe three observations an astronaut might make while viewing Russia at night.(Site 1)
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<span>One observation would be the physical size of Russia compared to other countries, despite a lack of visible borders from space. In addition, part of Russia's outline would likely be obscured by the various clouds and objects in the stratosphere; this would allow the astronaut to view potential cloud and weather patterns on earth. Also, an astronaut could see outlines of Russia's geography such as mountain ranges.</span>
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