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andreev551 [17]
2 years ago
6

Please help me please

Biology
1 answer:
Viefleur [7K]2 years ago
8 0

Answer:

cloud, water, rain

Explanation:

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Observing specimens of land plants under the microscope, you see structures not found in algae. What challenge of living on land
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Explanation:

Gravity: One of the <u>adaptations</u> of land plants are the deposits of <em>lignin and cellulose</em>. The cellular wall is composed of two phases:

-  The fibrillar phase, which is inert, rigid and constituted by long <em>cellulose</em> molecules. <em>Its function is to shape and protect the cell</em>.   

-  The matrix, constituted by pectic and hemicellulose substances.

Other substances can compose the cellular wall. One of them is the <em>lignin</em>, which is one of the most important components of the secondary wall, and after the cellulose, the most abundant polymer. During lignifications, the matrix contracts because of water loss, and the spaces left by the contraction are filled with lignin. Its function is to <em>give rigidity </em>to the cellular wall.

Competition: The meristem is composed of non-differentiated cells, with a thin wall, abundant cytoplasm, small vacuoles, and small endoplasmic reticule. Their size and shape vary: there are small isometric cells, and long, stretched, and fusiform cells. The <em>apical meristems </em>are in the roots and shoots. They compose the primary plant body. During growth the <em>meristem cells start to differentiate</em>, allowing the plant to get <em>bigger and higher</em>. In the competition for light, this is very important, especially when there are too many individuals together, like in a jungle or a forest. They need to <em>get</em> <em>higher</em> to <em>avoid being covered</em> by other plants and <em>to receive more radiation</em> for photosynthesis.  

Desiccation: Spores and pollen are covered by <em>sporodermis</em>, a membrane that covers and protects them. On the surface, there might be a pollinic cement, viscous and lipid, that favors adhesion with a pollinator. One of the principal functions of the sporodermis is to <em>protect the spore or pollen from dehydration</em>.

Radiation: Pigments are helpful filters; by their <em>absorption,</em> they <em>protect different tissues from injurious radiation</em>. When exposed to different  radiation, it is expected a change in plant pigments. This change can be related to different seasons, different stages of the plan development and different tolerance levels. Changes in pigments reflect the structural and functional reorganization of the photosynthetic system and are an indispensable part of the process of plant hardening to the changing radiation conditions.  

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3 years ago
Which statement about epithelium is correct?
boyakko [2]
C) It is thin tissue that lines the alveoli
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What are the characteristic of a quib?
Zolol [24]

Answer:

D. It has a strong influence on the ecosystem.A keystone species is a non-abundant species in an ecosystem. This species is important for the survival of the ...

Explanation:

7 0
2 years ago
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A small number of finches live in a protected bird sanctuary. Natural selection
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Answer:

Natural selection  is least likely to occur in this population if:

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For a species to survive in an area, it is essential that the place has enough resources like nutrients, space, water etc. If these resources are available then there will be less chances of competition which will lead to lesser chances of natural selection.

  • The number of of death rates is equal to the number of of birth rates

In an balanced ecosystem, the number of birth rates is equal to the number of death rates for a population. If the number of death rates is lesser to the number of birth rates then the competition for resources will lead to natural selection.

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Which of the following occupations would plan and conduct an experiment to analyze the quality of groundwater?
Olegator [25]
Hello,

The answer is option D "<span>natural science technician".

Reason:

A natural science technician studies in natural resources for example: water or ground water.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit</span>
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