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Marat540 [252]
3 years ago
7

Which statement is true about a scientific method

Biology
1 answer:
nexus9112 [7]3 years ago
7 0
<span>The scientific method involves developing and testing conclusions by following a prescribed sequence of steps</span>
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2. An adaptive advantage of having a three-chambered heart, as found in amphibians, over the two-chambered heart of fish is that
Nadya [2.5K]

Answer:

fully oxygenated blood returning to the amphibian heart can undergo additional pumping to reach higher pressures.

Explanation:

Fishes have a two-chambered heart with one atrium and one ventricle. The blood is pumped from the atrium into the ventricle. Ventricle pumps blood into a single circuit of blood vessels. Blood is oxygenated as it passes through capillaries in the gills. As blood circulates through the gill capillaries, it has low blood pressure and therefore, is delivered very slowly to the other organs.  

The amphibian heart has two atria and one ventricle. A sinus venosus collects oxygen-poor blood and pumps it into the right atrium. Oxygenated blood from the lungs passes directly into the left atrium. The left atrium pumps the oxygen-rich blood into the arteries that conduct it to the various tissues of the body. Therefore, a three-chambered heart in reptiles allows the delivery of oxygenated blood with high blood pressure.

6 0
3 years ago
What do you think could be done to minimizes people’s fears about genetic engineering?
BigorU [14]

Answer:

By comparing the plants and animals we've bred for thousands of years for the perfect amount of food and parts we like. It's possible to create perfect humans, and to make humans immune to disease and genetic disabilities  

Explanation:

8 0
2 years ago
One species of a small birdlike animal has an extremely variable tail length, which is a highly polymorphic trait. Geneticists h
Troyanec [42]

Answer:

D. 12cm

Explanation:

there are 8 A1, C1 and so on alleles there, this will be 8 cm and there are about 8 a2 and so on alleles,  this will be 4cm.

8 + 4 = 12cm

6 0
3 years ago
Have a good day yall and finish off the school year strong
sammy [17]
Thank you! you as well buddy!
8 0
3 years ago
Read 2 more answers
Which chromosomal change is represented?
scoray [572]
There are man chemical and physical changes such as geno and pheno.
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