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Ainat [17]
2 years ago
14

Which of the following prevents blood from flowing backward through the circulatory system?

Biology
1 answer:
S_A_V [24]2 years ago
8 0

Answer: Valves in the veins

Explanation: The flow of the blood inside the body takes place through the veins and arteries. The oxygenated blood from the heart is supplied to the different parts of the body.

The blood flows from the capillaries to the venules and from there to the veins. The blood moves in the veins by the rhythmic movement of the smooth muscles in the body.

Most of the blood moves against the gravity so there is a chance that it can backflow so to prevent this there are valves in the veins known as one way valves.

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Is it possible for natural selection to create a new species? Explain your answer. *
mel-nik [20]
Yes, natural selection can create different species because over time one species will turn into subspecies and as soon as one subspecies cannot breed with the other subspecies they are no longer the same species. Natural selection creates species through adaption and survival of the fittest, so yes natural selection can create different species.
4 0
2 years ago
Read 2 more answers
Poultry products are a likely source of infection by:
STALIN [3.7K]

Poultry products are a likely source of infection by Salmonella enterica

which causes typhoid.

Most farm animals such as pigs, cattle and poultry have been found to be

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This is why it is advisable to apply much heat on poultry products such as

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Read more on brainly.com/question/25258835

3 0
2 years ago
A population has 1000 individuals. A PCR analysis of the genotypes of a gene associated with Lactase persistence are: LL = 450 L
ss7ja [257]

Answer:

L allele: 0.575 (or 57.5%)

l allele: 0.425 (or 42.5 %)

Explanation:

Homo-zygous individuals have two copies of the same allele (i.e., either L alelle or l allele), while heterozygous individuals carry both alleles at a time (i.e., one L allele and one l allele). In consequence:

- Frequency of the L allele: [(450 x 2) + 250] / 2000 = 0.575

- Frequency of the l allele: [(300 x 2) + 250] / 2000 = 0.425

3 0
3 years ago
A group of cells that join together for a particular function is known as:
nata0808 [166]
It’s tissue I’m sure
5 0
3 years ago
All eukaryotic cells are multicelular?<br> True<br> False
noname [10]

Answer:

Uhhhh false, multicellular means a living thing made up of two or more cells soooooooooo...

Explanation:

6 0
3 years ago
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