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lesya [120]
3 years ago
10

Describe the structure of the ovule and the formation of the embryo sac

Biology
1 answer:
Bess [88]3 years ago
7 0

Answer:

An embryo sac is said to form when the haploid megaspore nucleus divides. It possesses two haploid nuclei and six haploid cells which do not have cell walls.

Explanation:

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In the term trace element, the adjective trace means that
Margarita [4]

Answer:

The elemental is required in very small amount. (Ans. A)

Explanation:

Trace element is also known as micro-nutrient. It is also defined as any chemical element required by living organisms in a minute or small amounts which is usually part of the vital enzyme (cells produced by catalytic protein).

Exact needs of trace elements vary among species, like commonly required plant trace elements are cooper, zinc, manganese, boron, and molybdenum. Animals commonly required iodine, manganese, and cobalt.

Absence of necessary plant trace elements required by plants in the soil causes deficiency disease, lack of animal trace elements used by animals in the soil may not harm plants, but, animals feeding on those plants develop their deficiency disease.

So, the adjective trace means that the elemental is required in a very small amount.

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3 years ago
A pig that has a curly tail (he is heterozygous for this trait) mates with a pig that has a straight tail. Curly tails are domin
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Curly?

Explanation:

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The __________ is the complex organ that enables people to complete many actions and processes. A. heart B. brain C. spinal cord
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B. Brain is the answer I am pretty sure
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2 years ago
A factory uses lake water as a system coolant, then returns the water, causing thermal
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The water which is released back to the lake contains thermal energy ie heat energy from cooled engines therefore bringing thermal pollution

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Compare strain and stress
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While stress is a type of pressure given by force acting per unit area. Strain is the ratio of change in length and total length when stress occurs. Ratio of stress and strain gives Young's Modulus. The curve between stress and stress is linear as long as they are proportional to each other.

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