Answer:
there were only anaerobic heterotrophic bacteria (the primordial atmosphere was virtually oxygen-free).
Answer:
Organism.
Explanation:
A cell is the smallest unit of a living thing. Whether made of one cell (like bacteria) or many cells (like a human), is called an organism. Thus, cells are the basic building blocks of all organisms.
The student could measure only the rate of anaerobic respiration by measuring the carbondioxide gas concentration.
<h3>How to measure the rate of anaerobic respiration?</h3>
In the absence of oxygen, yeasts convert glucose into ethanol and carbon dioxide. This rate of carbon dioxide is used to measure of the overall rate of anaerobic respiration.
So we can conclude that the student could measure only the rate of anaerobic respiration by measuring the carbondioxide gas concentration.
Learn more about respiration here: brainly.com/question/22673336
Answer:
c. each primary spermatocyte produces 4 gametes while each primary oocyte produces one gamete.
Explanation:
The primary spermatocytes are the diploid cells that enter the process of meiosis during spermatogenesis. Meiosis-I in one primary spermatocyte produces two haploid secondary spermatocytes. Both of these secondary spermatocytes enter the second meiotic division and form a total of four spermatids.
On the other hand, the primary oocyte enters the process of oogenesis and gives rise to one secondary oocyte and a first polar body. Both of them are haploid. Meiosis-II in the secondary oocyte forms an egg cell and second polar body. Therefore, only one female gamete is produced by one primary oocyte.
