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Q2.
The diagram shows a human sperm cell.
middle piece
nucleus
tail
head
(a) How many chromosomes are there in the nucleus?
(b) A sample of semen contains 40 million sperm cells. Only sixty percent of these
sperm cells are capable of swimming.
Calculate how many sperm cells in this semen sample are capable of swimming.
Show your working.
(2
The use of piers and beams to build a strong foundation for a house.
Answer from: Quest
i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.
Answer from: Quest
nuclear fission produces elements that are heavier than helium.
the elements that are used in nuclear fission and their products are much heavier than helium.
Answer from: Quest
Because you ate playdough
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