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mote1985 [20]
2 years ago
13

As a plant grows, new root hair cells are formed from unspecialised cells.

Biology
1 answer:
Marina86 [1]2 years ago
4 0

Answer:

Root hairs appear in the root maturation zone and differentiate from unspecialised cells called trichoblasts.

Explanation:

Root hair arises as a small protrusion surrounded by a cell wall, they are found in the piliferous area; they can originate in unspecialised epidermal cells, in some called trichoblasts. The bump begins to elongate and moves away from the epidermis, forming root hair. The root hairs as they lengthen, it is seen that their content shows a polarized distribution, the apical part is constituted mainly by vesicles secreted by the Golgi apparatus that contain the precursors of the cell wall that are to be released by exocytosis. Trichoblasts can be arranged in different ways, there are roots where any of the cells that are part of the rhizodermis can give rise to a root hair. In other roots, trichoblasts and atricoblasts have been seen to be distinguished alternately along a row of cells.

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List two pro and cons of genetic engineering
eimsori [14]
Pros: Might someday cure disease, might someday increase crop yeild, might create things that can be of our use. 

Cons: Genetic engineering could cause food allergies, have bad side affects, it could kill animals over time. 

I hope this helps. 
3 0
3 years ago
Which statements describe thigmotropism check all that apply
Finger [1]

Description of  thigmotropism is given below.

Explanation:

1. Thigmotropism is a plant’s response to touch.It is a plant’s response to an external stimulus.It can occur quickly or slowly.Thigmotropism may involve the closing and opening of plant leaves.

2. Thigmonasty or thigmotropism can be define as the response of touch shown by the plants. Here, touch is the external stimulus. It can be define as the movement of the plant parts in response to the external stimulus that is contact or touch. It is also known as Haptotropism. The plant may change it's orientation, shape and size of the plant parts.

3,The thigmotropism can be positive or negative depending upon the visual response shown by the plants. The response shown by the plants is generally fast  but may be slow. This response is shown by the plants in cases of danger of herbivory.Some plants like Mimosa pudica or touch me not plant shows thigmotropism by closing their leaves on touch

8 0
2 years ago
What is fragmentation ?
finlep [7]

Fragmentation is the breaking of the body into parts and then the organism develops all the parts of the body. The fragmentation is the type of reproduction in lower organisms. The fragments which are produced can develop into new organisms.

6 0
2 years ago
Read 2 more answers
Assume a normal female with a resting tidal volume of 400 ml, respiratory rate of 13 breaths/min, and dead space of 125 ml. When
bija089 [108]

Answer:

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Exercising a) 5500 ml/min

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increasing both rate and depth has the largest effect and this would happend in real life

4 0
3 years ago
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nadezda [96]

Answer:

D

Explanation:

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