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TEA [102]
3 years ago
15

Which of these is the study of human population size and the factors that influence it?

Biology
1 answer:
taurus [48]3 years ago
4 0
Are there options for the answer choice.
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How is melting water turning it from the ice to liquid water an example of a physical property
Ivan

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A. Melting the substance doses not change the substance

Explanation:

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providing examples explain how sexual reproduction in plants has evolved to become less dependent on water
Mars2501 [29]

The Gymnosperms and Angiosperms are groups of plants with seed, which means that they don’ t necessary acquire water for fertilization. These groups have made adaptations for sexual reproduction on dry land.

1) Gymnosperms (plants with the seeds are not enclosed in an ovary) have developed over the course of its evolution, structures that solved the main limitations present in the Pteridophytes in relation to sexual reproduction, in the terrestrial environment. The main changes that happened as an evolutionary adaptation to dry land are those on the seeds and pollen. The advantages of the seeds are: the storage tissue which sustains growth and a protective coat of the seeds. Seed is enveloped with the layers of hardened tissue which prevents desiccation. This is what frees reproduction from the need for a constant supply of water. <span>The sperm (male gamete) of gymnosperms</span> is enclosed in a pollen grain. Thi structure is protected from desiccation and can reach the female organs without dependence on water. Gymnosperms also developed structures called cupules to enclose and protect the ovule (the female gametophyte) which will develop into a seed upon fertilization.

 

2) Angiosperms are a group of plants which protect their seeds within an ovary called a fruit. Angiosperms have special evolutionary adaptations. For example, they produce their gametes in separate organs, usually in a flower, so the fertilization and embryo development takes place inside an anatomical structure. That provides a stable system of sexual reproduction largely sheltered from environmental fluctuations like water need.

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3 years ago
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It is a 5% more chance that boys will be diagnosed with autism than girls.
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Identify whether this describes heat or temperature.<br> Unit of measurement: Celsius
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Pretty sure temperature, Celsius and Fahrenheit are both ways to measure the temperature weather it is hot or cold
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