What is a type of fibrous protein that makes up the majority of the cortex of a hair?

1 answer:

3 0

Keratin is a fibrous protein, that makes up a large component of the hair and nails. It is a hardened protein, with some flexibility, that is used by epithelial cells to protect the cells from damage and stress, when the hair or nail is still in the roots. It is found in high amount, in vegetables and fruits that are orange in color (carrots in particular)

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Water availability impacts plant growth and animals who depend on plants for food are interactions between the

andriy [413]

Answer:

hydrosphere and biosphere

Explanation:

The spheres of the Earth are lithosphere, biosphere, atmosphere, hydrosphere etc. Hydrosphere refers to the collection of all the water bodies on the surface of the Earth e.g oceans, lakes, rivers etc. On the other hand, biosphere refers to the collection of life on Earth e.g plants, animals, microbes etc.

In this question, Water availability is said to impact plant growth and the animals who depend on plants for food. These water availability and the living organisms (plants and animals) it impacts are interactions between the HYDROSPHERE AND BIOSPHERE.

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Rain, Sleet, and snow are examples of what?

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They are examples of precipitation

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9. Consider the below Punnett square cross. Explain how you could use it to determine which parent

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Answer: The father determines the biological sex of a baby

Explanation: Human beings have two sex chromosomes, males have XY chromosomes whereas females have XX chromosomes. During fertilization, an egg from a woman fuses with a sperm cell from a man to form a zygote. Women have two X chromosomes (XX) and any point in time they can only release an egg bearing an X chromosome but males have one X and one Y chromosome, therefore they can either release a sperm cell with an X chromosome or a sperm cell with a Y chromosome. When an egg with X-chromosome fuses with a sperm cell with an X chromosome, the resulting baby is a female but when an egg with an X chromosome fuses with a sperm cell with a Y chromosome, the resulting baby is a male.

What makes the difference in both sexes is the Y chromosome from the man, therefore the father determines the biological sex of a baby.

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Very powerful microscopes were needed before cells could be observed in detail

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What is the most important difference between prokaryotes and eukaryotes

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Prokaryotic cells are simple, ancient cells without a nucleus. Eukaryotic cells are more complex and have a nucleus.

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