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Nat2105 [25]
3 years ago
15

PLEASE HELP !!! 10 points

Biology
1 answer:
Drupady [299]3 years ago
6 0

Blood typing is an example of codominance  

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The main function of the circulatory (or cardiovascular) system is to deliver oxygen to the body tissues, whilst simultaneously removing carbon dioxide produced by metabolism.

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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.

7 0
3 years ago
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About how many times thicker is a
ANEK [815]

Explanation:

I think it's up to 100 times

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3 years ago
What is the role of the umbilical cord in a pregnancy?​
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To feed nutrianse to the baby. whe the mother eats that goes to the umbilical cord and gives it nutriance

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Explain how the structure of your fingers is related to their grasping function.
Karolina [17]

<u>ANSWER:</u>

The muscles and joints allow the hands to perform their function of holding and grasping a wide variety of things.

<u>EXPLANATION:</u>

  • The structure of hands is "very delicate and complex". The tendons, nerve fibres, tissues and thin muscles are located right under the skin.
  • The bones of the hand including the 4 carpal bones, 5 metacarpal and 14 finger bones are all connected by joints and ligaments and these allow the hand to grasp things.
  • The wrist is made of "two parts of a joint" that allow the extension and stretching of hands.
6 0
3 years ago
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