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Ghella [55]
3 years ago
11

What are these structures stop blood flowing backwards into the atria.

Biology
1 answer:
wel3 years ago
6 0

Answer:Valves stop blood flowing backwards

Explanation: Valve are flags of tissue that control the direction of the blood in our heart.,it prevent the backwards flow of blood. valves regulate blood from flowing back into the atria.The right and left atrio-ventricular valves prevent blood from flowing backwards into atria. When the ventricle is full,the valve prevent backwards flow of blood.

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Which one of these is an example of cell division at work?
wel

The right option is; a. A tree grows tall

A tree grows tall is an example of cell division at work because growth is associated with cell division. Also, cell division in multicellular organisms such as plant involves tissue growth and maintenance. Cell division is a process of reproduction in which a cell divides into two or more cells. In this process, production of new cells involves DNA replication and there are various types of cell division. Prokaryotes (such as bacteria) divide their cell using binary fission, while eukaryotes divide their cell by mitosis or meiosis in some.


3 0
3 years ago
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4 0
3 years ago
What disease results when cells grow in an abnormal and
Akimi4 [234]

Answer: D. Cancer

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3 0
3 years ago
Two black guinea pigs of the same genotype were mated and produced 29 black and 9 white offspring. what would you predict the ge
Archy [21]
Hey there!

It can be assumed that the two black guinea pigs have one dominant gene, black fur, and one recessive gene, white fur. Using BB, Bb, and bb, when you look at this on a Punnett square, one out of the four boxes will be BB, which will end up with black fur, two boxes will be Bb, which will also end up with black fur, and one box will be bb, which will end up with white fur. If the parent guinea pigs were BB, all of the offspring would be black. If they were bb, they would be white instead of black. 

Hope this helped you out! :-)
3 0
3 years ago
Which of the following is an example of natural selection?
Alexxx [7]

Answer:

A) Hummingbirds drinking nectar from a plant.

Step-by-step explanation:

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3 years ago
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