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notsponge [240]
3 years ago
13

50POINT GIVE AWAY

Biology
1 answer:
Anna007 [38]3 years ago
5 0

Answer:

<h3>Have a good day </h3>

<h3>Thanks for the free points ❤❤❤❤</h3>

<h3>Please mark my answer as a brainliest. </h3>
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11. Countercurrent exchange in the legs of geese
Shkiper50 [21]

Answer:

Reduces heat lost to the water

Explanation:

In some birds such as the geese, to reduce the amount of energy cost when regulation their temperature, some morphological and behavioural has been used to maintain the rate of heat gain and loss. For uninsulated parts of the birds's body such as the legs, there is the presence to countercurrent head exchange between wherein the arteries and veins in the legs lie in close contact with each other in other to retain heat as these uninstalled regions are potential areas of heat loss since they are uninsulated unlike insulated parts (parts covered with feathers). Constriction of the arteries and veins will ensure blood flow to the feet of the geese at a low temperature.

5 0
3 years ago
Contrast the approaches of Charles Darwin and Gregor Mendel to the study of populations. What were Darwin’s main discoveries? Wh
Alborosie

Answer:

The elucidation of the mechanisms of biological inheritance and the understanding of how life evolved on Earth, the two important pillars on which a part of current biology supports. The founders of these branches of science, built in very different ways the knowledge they brought to all mankind.

Explanation:

Charles Darwin proposed the theory of biological evolution by natural selection. Define evolution as offspring with modification, the idea that species change over time, give rise to new species and determined a common ancestor. The mechanism he proposed for evolution was natural selection. Since resources are limited in nature, organisms with heritable characteristics that favor survival and sensitive reproduction leave more offspring, which makes the frequency of these characteristics increase over several generations. Natural selection makes populations adapt or become more appropriate to their environment over time. Natural selection depends on the environment and needs inheritable variations.

Meanwhile, Mendel, based on his experiments, formulated three general laws:

-The descendants of the crossing of two pure varieties of the same species are all the same. This first law is called the law of dominant characters.

-The descendants of the crossing of the hybrids with each other of the second generation is divided into four parts, three of them inherit the dominant character and one the recessive. This law is known as the law of segregation

-If the two original varieties differ from each other in two or more characters, each of them is transmitted independently of the others. This law is called independent transmission or the independence of the characters.

Darwin's ideas suggested his experiments with rabbits to Galton, but his inspirational capacity is over. Mendel's experiments, in contrast, traced a more fertile path. He had tested his mathematical laws with the pea. When trying to extend Mendel's ideas to other organisms, the scientists found changes that respond to different patterns, frequencies in the progeny that do not respond to the proportions found by the monk, but that have their own logic. Instead of weakening Mendel's model, the modifications were his strongest support. Mendel had founded a methodology that allowed discovering new methods.

3 0
3 years ago
12. In what direction does blood flow through the heart?
natima [27]

Answer:

B

hi

gesture

Explanation:

Right to left

hello

4 0
3 years ago
What would happen to the environment if all the nitrogen fixing bacteria died??
Evgesh-ka [11]
trees do not fix N2 from air they fix oxygen with the help of N2 fixing bacteria . so trees do not fix N2
3 0
4 years ago
When electrons are lost, a<br> When electrons are gained, a<br> ion is formed,<br> lon is formed
miskamm [114]

Answer: when one is lost, one is formed

6 0
3 years ago
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