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Nat2105 [25]
3 years ago
15

1. What percentage of the weight of Earth's crust is made of silicon?

Biology
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer: 27.7 percent

Explanation:

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Which of the following processes includes all the others?
Vinvika [58]

Answer:

Passive transport.

Explanation:

The transport of molecules across the plasma membrane can occur by the two process- active transport and passive transport. No amount of energy is required during the active transport.

Passive transport includes the diffusion and osmosis. Both the diffusion and osmosis do not require energy and the molecules move down from the region of higher concentration towards the region of lower concentration. Small molecules, ions and proteins can go through the passive transport.

Thus, the correct answer is option (c).

7 0
4 years ago
A cornea transplant involves the grafting of a donor cornea. true or false
Leto [7]

Answer:

A cornea transplant involves the grafting of a donor cornea into a recipient's anterior eye. The sutures to hold the graft in place must stay in place for a long period of time because the cornea is slow to heal. ... The fibrous layer includes the tough sclera (the "white" of the eye) as well as the transparent cornea. so TRUE

Explanation:

3 0
3 years ago
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According to the USDA, a "consists of a community of individuals who pledge support to a farm operation so that the farmland bec
I am Lyosha [343]

Answer:

The correct answer is CSA.

Explanation:

Community Supported Agriculture (CSA) is an alternative model for the distribution of agricultural products directly from the farmer to the consumer, it consists of a group of people who form a cooperative to grow and consume food. Through this socio-economic model, consumers lend their support to producers, in exchange for a direct and regular delivery of biological products, that is, producers and consumers support each other and share the benefits and risks of food production.

6 0
3 years ago
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How do earthworms enrich plant growth?
Luba_88 [7]

Answer:

They tunnel through the soil, which allows air to enter.

Explanation:

Earthworms are considered to be agriculturally friendly living organisms that hold immense importance in improving the growth and productivity of plants.

They live in the soil and feed on the debris of plants such as manure, grasses, roots and dead leaves. They extensively channel and tunnel through soils while moving that causes loosening of the soil resulting in more aeration of the soil. The more the soil aeration is, the better soil drainage is.

Studies have shown that soil containing earthworms have ten times better drainage than soils that donot have earthworms. Therefore, C is the best option.


Hope it help!

7 0
3 years ago
Describe thyme buds?? PLS ASAP
vesna_86 [32]

Explanation:

Thyme, Thymus vulgaris, is a small, perennial, evergreen shrub in the family Lamiaceae grown primarily for its leaves which are used as a herb. The thyme plant has an erect or ascending growth habit and possesses many woody, branching stems. ... The leaves can be green or variegated.

4 0
3 years ago
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