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olga55 [171]
3 years ago
13

Simple what first appeared in the proterozoic eon

Biology
1 answer:
dexar [7]3 years ago
5 0

Cyanobacteria, photosynthetic organisms that produce oxygen as a byproduct first appeared.

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The multiple nuclei in skeletal muscle cells are the result of the
tensa zangetsu [6.8K]

Answer:

Fusion of embryonic myoblasts, each having its own nucleus to many other myoblasts to form the multinucleated skeletal muscle fibers.

Explanation:

The multiple nuclei in skeletal muscle cells are as a result of fusion of embryonic myoblasts, each having its own nucleus to many other myoblasts to form the multinucleated skeletal muscle fibers. This gives rise to multiple copies of genes, allowing production of the large amounts of proteins and enzymes and ATPs needed for muscle contraction.

6 0
3 years ago
Why is nonpoint surface pollution is a greater threat and hazard than point source pollution
Natasha_Volkova [10]
Nonpoint source pollution is a greater hazard, because scientists are not able to identify a single location the pollution came from. It is harder to find a solution if they are unable to find the source.

Hope this helps!
have a great day.
6 0
3 years ago
please show work Nerodia sipedon insularum is a species of the Northern Water Snake that lives on islands in the western part of
raketka [301]

Answer:

Explanation:

From the question, the total population = 171 i.e (80+71+21)

Genetic frequency therefore; BB = 71/171 = 0.42

Bb = 80/171 = 0.47

bb = 20/171 = 0.12

Allele frequency therefore;

Allele B = 0.42+(0.50×0.47) = 0.66

Allele b = (0.50×0.47)+0.12 = 0.36

Note all values were rounded up to two significant figures

5 0
3 years ago
Question.
telo118 [61]

Answer:

humans is my best guess im not exactly sure.  

3 0
3 years ago
Read 2 more answers
Discussing the surprisingly high percentage of cancers caused by secondhand smoke would most likely be an example of which atten
svp [43]

Answer:

The correct answer is: Shocking or Horrifying the listeners.

Explanation:

  • Attention getting techniques can be defined as the sentences or information used in speeches during a verbal communication that will draw the attention of all the listeners towards the speaker.
  • In the given question, when speaker talks about the incidence of cancer in the second hand smokers who are also called the passive smokers, it alarms the listeners.
  • This is because according to the speaker's statement the people who are not addicted to smoking possess substantial risk of developing cancer due to passive smoking.
  • This raises curiosity and alarm among the listeners and they are keen and eager to get more update on the the subject of cancer development.
  • This way the speaker can prove himself to be a good orator.
8 0
3 years ago
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