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Nookie1986 [14]
3 years ago
10

What is the external stimulus in thigmotropism?

Biology
1 answer:
irina [24]3 years ago
6 0

Answer:

Thigmotropism is defined as a negative or positive directional response in a plant or part of a plant such as a plant organ, that is caused by an external stimulus such as touch or contact with any solid object. The factor that causes the stimulus is a hard surface that can change the direction of growth of the plant or part of the plant.  Hope this helps :)

Explanation:

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Ludmilka [50]
A memory B cell is kinda of how it sounds it has a memory of what your body has fought before such as a virus and can stimulate a response quicker then the first time you encountered it. 

If you lack memory B cells your body doesn't built up the same immune response when you come into contact with the virus again.

"Vaccination would prevent further disease" Incorrect, a vaccine lets you build up memory cells to combat the disease if you lack them you cannot build up a defense.
"Vaccination would not prevent further disease" Correct, a vaccine can be a dead version of a virus or parts of a virus that shows your body what to respond to quickly in the future. If you body cannot make memory b cells it wouldn't help to use a vaccine. Your body wouldn't keep a memory of it being bad.
"You would not produce antibodies" Even if your body does not remember a particular virus it does produce antibodies to combat it just not as quick or efficiantly as something it has come into contact with before and produced memory cells.
"You would over produce histamine" Incorrect, different process for that histamine.
6 0
3 years ago
Which of the following explains why cattle should not be given apples?
Nata [24]

Answer:

"Cows that eat apples can get a bloated stomach and die. But that's not what's happening when your cattle feed on apples fallen on the ground or those that you offer them to diversify their diet. ... So, if you plan to introduce apples into your cows' diet, do so gradually."

So your best choice is option A!

Explanation:

- Eijiro <3

7 0
3 years ago
Read 2 more answers
Name and describe three groups of protozoans
monitta

Answer:

(1) Amoeboid protozoans or sarcodines

They are unicellular, jelly-like protozoa found in fresh or sea water and in moist soil.

(2) Flagellated protozoans or zooflagellates

They are free living, non-photosynthetic flagellates without a cell wall.

(3) Ciliated protozoans or ciliates

They are aquatic individuals that form a large group of protozoa.

Explanation:

hope this helps :}

7 0
3 years ago
Which of the following is not a negative consequence of upward urban growth? a. pollution b. creation of a “heat island” c. incr
Murrr4er [49]
Solution: C. Increased use of surrounding land

Upward urban growth will increase pollution as the number of people will increase. The increase in population and obstruction of free movement of air because of upward urban growth will result in a "heat island". Since the number of inhabitants is going to increase with upward urban growth, waste management will also become an issue.
4 0
3 years ago
Read 2 more answers
). How many total electrons does a neutrally charged carbon atom contain in its orbits? How many electrons are in its innermost
scZoUnD [109]

Answer:

6 electrons

2 electrons

8 electrons

3 0
3 years ago
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