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Answers
Answer:
44. (a) Insulin
(b) The pancreas
(c) corticosteroids / cortisol
(d) Adrenal glands
(e) Testosterone
(f) Testes
45. a} i) Animal cells have no cell wall, while cell wall is present in plant cells
ii) Animal cells have many, small vacuoles, while plant cells have a single, large vacuole.
iii) Nucleus in animal cells is placed near the centre, while in plant cells, it is placed towards the periphery.
b) Robert Hooke.
c) Neurons or nerve cells.
46. a) When fossil fuels are burned, they release carbon dioxide and other greenhouse gases, which in turn trap heat in our atmosphere, making them the primary contributors to global warming and climate change.
47. The sex of a baby is determined by its chromosome make-up at conception. An embryo with two X chromosomes (one X chromosome from the father, one present in the mother) will become a girl, while an embryo with an X-Y (the Y chromosome from the father) combination results in a boy.
The diagrams are below :)
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