I believe the answer is b
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Answer:
<u>Major limitation of Jorge's experiment are -:</u>
- Vast amounts of data can be obtained.
- He does not prove definitively that a person is taller because of vitamins.
- No association between vitamins and height can be seen.
Explanation:
<u>ABOUT VITAMINS -:</u>
A vitamin is an organic molecule that is an important micronutrient that an organism requires in limited amounts for the proper functioning of its metabolism (or a chemically closely connected group of molecules, i.e. vitamins). In the body, basic nutrients can not be synthesized in adequate amounts, either at all or not, and must therefore be ingested via a diet.
Hence, the major limitations of the experiment are mentioned above.
I believe the answer is C. E. And F.
Answer:
a. both oxygen and carbon dioxide
b. carbon dioxide only
c. carbon dioxide only
d. oxygen only
e. carbon dioxide only
f. oxygen only
g. oxygen only
h. oxygen only
Explanation:
This question is describing the gaseous exchange of carbon dioxide and oxygen that occurs during cellular respiration. The gaseous exchange occurs via a structure called ALVEOLI OR AIR SAC.
According to this question, the following statements in the question will be matched with whether it applies to oxygen only, carbon dioxide only, or both oxygen and carbon dioxide:
a. Both oxygen and carbon dioxide are diffused through the alveoli capillaries.
b. Carbon dioxide is the waste product of cellular respiration (excreted via the lungs).
c. Carbon dioxide have the ability to form carbonates (CO3²-) and are sometimes transported in that form.
d. Oxygen from the lungs diffuse into the alveoli during inhalation.
e. Carbon dioxide from the body tissues are carried by the blood into the alveoli in order to be transported out of the body.
f. Inhalation is the taking in of air (oxygen-containing). Hence, oxygen only enters alveoli during inhalation.
g. Oxygen is the necessary substance needed by cells in order to perform cellular respiration (aerobic).
h. Haemoglobin is an iron-based protein present in the blood cells. It possess affinity for oxygen and carries oxygen in the blood.
