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yulyashka [42]
3 years ago
15

Explain why it is difficult to keep people who are sick off of planes.

Biology
2 answers:
Vlad1618 [11]3 years ago
6 0

Answer:

Many diseases like sars, don't show up on simple testings and the person could have a disease early on and it would be nearly impossible to identify.

Anarel [89]3 years ago
5 0

Answer:

because the want to reach their destination

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Common characteristics supporting the idea that the first land plants were related to green algae include __________.
Vlad1618 [11]

Answer:

Presence of chlorophyll  pigment in the leaves and cell walls were made of cellulose

Explanation:

The first plants that appeared on the land areas were comprised of the main component known as the cellulose that forms the cell wall of the plants and is responsible for making the various parts of plants such as branches, plant stems, and leaves, stronger and supportive.

In addition to this, the leaves of these primitive plants were comprised of green pigments known as chlorophyll that absorbs the sunlight and CO₂, and helps the plants in preparing the food for themselves as well as for the consumers, and also liberates oxygen (O₂) with it.

Thus, these are the two common characteristics that supported the idea that the primitive land plants had a relation with the green algae.

7 0
3 years ago
The ___ nerve connects to the heart and adjusts it's speed according to the body's demands.
BlackZzzverrR [31]
The vagus

Hope I helped 


8 0
3 years ago
Read 2 more answers
In C3 plants the conservation of water promotes_______.a. photorespiration. b. a shift to C4.c. photosynthesis.d. the opening of
ankoles [38]

Answer:

A) photorespiration.

Explanation:

Photorespiration is the harmful metabolic process which takes place when the concentration of oxygen in the leaf increases compared to carbon dioxide.

The RUBISCO enzyme which usually binds the carbon dioxide now binds the oxygen and form the phosphoglycolate and 3 phosphoglycerate. The phosphoglycolate is lost through the Calvin cycle as Carbon dioxide molecule. This loss proves harmful to the plants.

The photorespiration occurs when the plant faces high temperature therefore n order to prevent water loss the stomata gets closed. This result in the binding of the oxygen to the RUBISCO and thus photorespiration begins.

Thus, Option-A is correct.

6 0
3 years ago
The circulatory system is directly responsible for which of the following
seropon [69]
 C. transporting nutrients to cells
7 0
3 years ago
If new experimental findings contradict a scientific theory, what might happen to the theory?
Viktor [21]

Answer:

A. The new evidence could be accepted and the theory changed.

Explanation:

most reasonable answer

8 0
3 years ago
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