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Usimov [2.4K]
4 years ago
7

The outer membrane which covers the lungs?

Biology
1 answer:
Rudiy274 years ago
6 0
It's called the pleura!
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4. A scientist is observing living Cells in a Petri Dish under a Compound Light Microscope and recorded their
cricket20 [7]

Answer:

D. Several cells are in the process of dividing into two new cells

Explanation:

The universal cell theory which was proposed in 1838 and contributed by three scientists namely: Theodor Schwann, Rudolf Virchow, and Mathias Schleiden, consists of three components namely:

1) Cell is the basic and functional unit of life

2) All living organisms are made up of one or more cells.

3) All existing cells arise from pre-existing cells.

Hence, in this question involving a scientist who is observing living Cells in a Petri Dish under a Compound Light Microscope, the observation that "Several cells are in the process of dividing into two new cells" provides evidence to support one of the three components of the cell theory ( all living cells arise from preexisting cells).

4 0
3 years ago
In general, when performing spread plates, __________
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Answer:

a) 0.1 mL

b) contamination

c) clumping of colonies

d) Uneven colonies

Explanation:

In general, when performing spread plates, 0.1 mL

mL of cell suspension is added to the plate to prevent the formation of a microbial contamination

Adding more than 1 mL of cell suspension to an agar plate will result in a clumping of colonies.

Adding less than 1 mL of cell suspension to an agar plate will result in a Uneven colonies

4 0
3 years ago
The period of the embryo begins atand ends withwhich takes about
Inga [223]

Answer:

The first 2 weeks of development is the germinal period. The germinal period begins with conception and ends when the blastocyst is fully placed into uterine tissue. Next, the embryonic period lasts from implantation until about 8 weeks from the time of conception.

Explanation:

The third thru the eighth  week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

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3 years ago
A set of genes whose transcription is regulated by an operator gene is called a(n) _______.
stealth61 [152]
Operon is the answer
4 0
3 years ago
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Good afternoon everyone, What is photosynthesis thank u✌️​
ch4aika [34]

Answer:

the process by which green plants turn carbon dioxide and water into food using energy from sunlight.

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3 years ago
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