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stealth61 [152]
3 years ago
12

With the aid of a sketch. Describe foetal circulation​

Biology
1 answer:
Cerrena [4.2K]3 years ago
4 0

Answer:

In animals that give live birth, the fetal circulation is the circulatory system of a fetus. The term usually encompasses the entire fetoplacental circulation, which includes the umbilical cord and the blood vessels within the placenta that carry fetal blood.

Blood flow in the unborn baby follows this pathway: Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby's liver. There it moves through a shunt called the ductus venosus

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The table shows the survival rate of two types of beetles in the same environment over a
larisa86 [58]

The survival rate is a measure of the fitness of each species. Option A is correct. Green beetles are more fit for the environment than brown beetles are.

<h3>What is fitness?</h3>

Fitness or Aptitude can be defined as the contribution of each genotype to the next generation.

Fitness is reflected by the phenotype that results in the survival, fertility, and capability of having a mate.

It is a way of measuring the individual ability to leave fertile offspring.

Aptitude must be significant to the natural selection act in its favor.

In the exposed example we can see the survival rate of two species.

The survival rate is telling us about the fitness of each species.

  • The green beetle increases its survival rate (fitness) each year
  • The brown beetle decreases its survival rate each year

These results lead us to believe that the Green beetles are more fit for the environment than brown beetles are. Option A is correct.

You will learn more about fitness at

brainly.com/question/25602901

5 0
3 years ago
Why was the spread of agriculture an important vent in human history?
MrMuchimi

It has given individuals with 1 of their most essential needs, a dependable supply of nourishment.

Glad to help ya!! :)

3 0
3 years ago
What purpose does a fish ladder serve?
Whitepunk [10]

<u>Answer</u>: Option A

<u>Explanation</u> :

  • A<em> fish ladder</em> is also known as fish steps, fish pass or fishway.
  • It is built around waterfalls, dams and locks.
  • The purpose of building a fish ladder is to<em> facilitate the natural migration of diadromous fishes.</em>
  • A fish ladder helps the fish to pass through the barriers by leaping up or swimming through the low steps of the ladder and reach into the water on the other side.
  • Since, without the fish ladder the barriers will not allow the migration of fishes, it is essential to be built around the dams, waterfalls and locks.
3 0
3 years ago
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Why is it beneficial for the sex cells made at the end of meiosis to be DIFFERENT from each other?
Anestetic [448]

Answer:

if sex cells were identical, there won't be genetics variations and we will just all be identical to our parents. genetic variation allows us to better adapt and survive

8 0
4 years ago
HELP ME WITH THIS 60 POINTS,5-STAR RATING, AN THANKS AND MARKED AS BRANLIEST.
mel-nik [20]

Answer:

Independent Variable: temperature

dependent variable: chirps

Hypothesis: the lower the temperatures the less chirps

constants: temperature or food and water

repeated trails: success and failure

control:the experiment

6 0
3 years ago
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