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3 years ago

What is the difference between ventilation, gas exchange and cell respiration?

1 answer:

7 0

The process of inhaling and exhaling, with oxygen entering the alveoli (large surface area). (Carbon dioxide for oxygen). Cell Respiration: The chemical process occurring in the mitochondria where energy is released as ATP.

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What is natural selection?<br> -compare natural selection to evolution

hram777 [196]

Answer:

its when certain organisms are better suited for certain enviornments or they have genes that allow them to live in a enviornment without struggle

Explanation:

8 0

3 years ago

Read 2 more answers

In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds), while aa plants have yellow ke

lara31 [8.8K]

Answer:

Explanation:

As given,

Allele A for blue anthocynin.

aa for yellow kernel;

at second locus;

W produce smooth kernel,

ww for wrinkled kernel;

Parents as given are: AaWw and aaww

Progeny are:

blue smooth ( AaWw)= 1447;

blue wrinkle (Aaww)= 169;

yellow smooth (aaWw)= 186;

yellow wirnked (aaww)= 1510

Recombinant progeny are 169+ 186= 355

non- recombinant progeny are = 1447+ 1510= 2957

so recombination frequency (RF)= 346/2957×100= 12.0054%

So a and w are linked genes.

They are 12 mu far away from each other.

b) Blue smooth parent= AaWw.

c) Aaww crossed with aaWw

progeny are= AaWw, Aaww, aaWw, aaww,

They all are produced in same proportion =0.25% or 1/4.

5 0

3 years ago

Place the following steps of endomembrane system function in the correct order.

maks197457 [2]

Answer:

Explanation:

<em>The correct option here would be</em><em> D</em><em>.</em>

The endomembrane system refers to a group of membrane-based organelles whose primary function is to synergistically work together to modify, package, and transport lipids and proteins. The system includes organelles such as the lysosome, the nuclear envelope, the endoplasmic reticulum, and the Golgi apparatus.

For an endomembrane system function involving a protein, the protein would first of all need to be synthesized by the ribosome - the free ones or the ones attached to the rough endoplasmic reticulum. Thereafter, the synthesized protein would then be folded or packaged into transportable vesicles. The vesicles are then received by the Golgi apparatus which further modifies the proteins before transporting them accordingly.

Hence, the correct order of a typical endomembrane system function would be:

<em>Ribosomes on the RER synthesize proteins.</em>
<em>Proteins are packaged into transport vesicles.</em>
<em>Golgi apparatus receives transport vesicles from the RER.</em>
<em>Proteins are modified by the Golgi apparatus.</em>
<em>Modified proteins may be secreted from the cell by exocytosis.</em>

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3 years ago

What statement most directly demonstrates a way that the geosphere is involved in the nitrogen cycle

Ulleksa [173]

B. bacteria that convert ammonia into nitrites and nitrates are found in the soil

This statement best demonstrates a way that the geo-sphere is involved in the nitrogen cycle.

A nitrogen cycle is defined as the movement of nitrogen between the atmosphere, biosphere, and geo-sphere in different forms. Ammonia is converted to nitrates by nitrifying bacteria in the soil. Then the plants absorb these nitrates from the soil and use these to build up proteins.

6 0

3 years ago

Read 2 more answers

Sperm are created through meiosis in an area of the testes called the seminiferous tubules. Through which structure do the sperm

Alborosie

Answer:

Epididymis

Explanation:

From the testes, the sperms travel to the epididymis. These structures can be found resting on top of each testes. Fresh out of the testes, sperms are not yet matured and this is where the epididymis takes over. The sperm are stored here and this is where sperm matures. From here, the sperm moves into the vas deferens.

6 0

3 years ago