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Tasya [4]
3 years ago
6

Airplanes reach cruising altitudes at the lower part of the Earth's stratosphere. This portion of the atmosphere is made up most

ly of and ?
Biology
1 answer:
Lerok [7]3 years ago
6 0

Answer:

The stratosphere is a layer of Earth's atmosphere. ... The troposphere, the lowest layer, is right below the stratosphere. ... Because of this, jet aircraft and weather balloons reach their maximum operational altitudes within the stratosphere. ... from the bottom of the stratosphere up to altitudes of 40 or 50 km (25 to 31 miles).

Explanation:

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C4 plants occur more commonly in desert conditions because _____. a. they can fix carbon at the lower CO2 concentrations that de
ahrayia [7]

Answer:

a. they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed

Explanation:

C4 plants are those that have the capacity to fix CO2 even when a tiny concentration of it is available.

Desert condition is characterized by dryness and strong heat with both condition capable of creating water stress in plant as a result of evapotranspiration. In order to reduce evapotranspiration rate, desert plants (most C4 plants) close their stomata during the day.

<em>Stomata closure limit the diffusion of CO2 into desert plants and the small concentration of CO2 that results is utilized by a special enzyme in the plants.</em>

The correct option is a.

6 0
3 years ago
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Does exocytosis require energy?
spin [16.1K]

Answer:

There are two types of vesicle transport, endocytosis and exocytosis (illustrated in the Figure below). Both processes are active transport processes, requiring energy. Illustration of the two types of vesicle transport, exocytosis and endocytosis.

Explanation:

So in a simple explanation yes they require energy:)

3 0
3 years ago
Compare the processes of mitosis and meiosis by explaining the number of cells formed in each process, Number of chromosomes in
andreev551 [17]

Answer:

1) In mitosis, a single cell is divided into two daughter cells while in meiosis a single cell is divided into four daughter cells.

2) Mitosis occurs in body cells in which sperm and egg cells combine and make a diploid zygote while meiosis are present in sex cells in which haploid cells are produced.

3) In mitosis, the number of chromosome is double i. e. Diploid while in meiosis the number of chromosome is half i. e. haploid.

4 0
3 years ago
What is the chance of an accidental discovery happening?
Anit [1.1K]
A little bit less than a purposely discovery. A discovery that you've been looking for for a while would be like 75% of discovering but accidentally would be 35% of actually discovering something accidentally.
3 0
3 years ago
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Succession Interactive!
JulijaS [17]

Answer: All of these are true (besides the one that says that none are true...).

Explanation:

The ecological succession is a slow change in the living community of the ecosystem along with the changes occurring in the non-living environment until the ecosystem attains stability.

The primary succession can be defined as the initial level of succession. This succession begins in the primitive environment. The soil develops after the weathering process of rocks.

The secondary succession begins in the region where life forms existed before and the area begin damaged by the catostrophic event like forest fire, earthquake and other type of calamities. Some remaining plant parts can give birth to the entire colony of plants.

3 0
3 years ago
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