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White raven [17]
3 years ago
11

What is the proper name for the electrical system in the heart?

Biology
1 answer:
borishaifa [10]3 years ago
7 0

Answer:

SA node

Explanation:

The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.

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Oliga [24]

Answer:

C because During Meiosis 4 HAPLOID not diploid cells are made

Explanation:

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4 0
3 years ago
RNA primer constructed during DNA replication needs to be replaced because RNA differs from DNA. It contains_______ instead of__
Zarrin [17]
DNA- adenine, guanine, thymine, and cytosine

RNA- adenine, guanine, uracil, and cytosine

So RNA contains uracil instead of thymine
8 0
3 years ago
Read 2 more answers
Why the bass and crayfish benefit from an increased level of phosphate, initially, but then die off
omeli [17]

Answer:

Increased levels of phosphate are beneficial to phytoplankton and aquatic plants. In the short-run, this means increased micronutrients for herbivorous and omnivorous fish.

The phosphate, however, reacts with the water to reduce the oxygen levels obtainable in the water. Without oxygen, the fishes die off.

It is not unusual to find that with increased phosphate in water, healthy fishes begin to die off without any other plausible explanation.

The solution is to clean the water or treat it with solutions that impact positively whilst reducing the phosphate levels.

Cheers!

8 0
4 years ago
Conventional wisdom holds that the development of separate species happens quickly, most often when populations become separated
Genrish500 [490]

Answer: D. allopatric; breakdown

Explanation:

Allopatric speciation is a type of speciation whereby individuals of the same biological population becomes separated up to the extent that there will no longer be gene flow between them.

3 0
3 years ago
Which of these is a flap that shuts off the passage to the trachea and lungs?
lara31 [8.8K]
Were going to need you to put the multiple choices up too.
5 0
4 years ago
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