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life science paper 1 test
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Exam of 9 pages for the course Life science at 12th Grade (life science terms)
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BIOLOGICAL TERMS: PAPER 1Give the correct biological term for the following descriptions.
Description Biological term
1. The period of development of an embryo in the
uterus between fertilisation and birth.
2. Disease characterised by a lack of insulin
production.
3. Tube that connects the pharynx and the middle ear.
4. A process by which nutrients become highly
concentrated in a body of water, leading to increased
growth of organisms such as algae.
5. A stage in the development of humans in which the
embryo consists of a layer of cells surrounding a
cavity.
6. The structure at the tip of a sperm cell containing
enzymes and which makes contact with the egg cell
during fertilisation.
7. The gland in the male reproductive system of
humans that produces an alkaline fluid to counteract
the acid environment of the vagina.
8. The duct leading from the testis to the urethra in
human males.
9. The process by which the ovum is formed through
meiosis in the ovary.
10. The membranes which protect the central nervous
system.
11. A plant growth hormone that stimulates seed
germination.
12. The nervous system which consists of cranial and
spinal nerves.
13. A branch of the autonomic nervous system that
decreases the heartbeat back to normal.
, 14. The outermost extra-embryonic membrane
surrounding the embryo.
15. The hormone that regulates the salt concentration
in the human body.
16. The blood vessel in the umbilical cord that carries
blood rich in oxygen and nutrients.
17. The hormone inhibited by an increased level of
thyroxin.
18. The structure in the ear that equalises the pressure
on either side of the eardrum.
19. Measurement of the total amount of carbon dioxide
emissions of an individual, a defined population or a
company per year.
20. The type of pollution caused when water is
released into a river after being heated in power
stations or industries.
21. The watery fluid that supports the cornea and the
front chamber of the eye.
22. The hormone produced by the Graafian follicle.
23. The hormone responsible for the formation of the
corpus luteum.
24. The receptors in the ear that detect changes in the
direction and speed of any movement of the body.
25. The type of fertilisation associated with viviparous
reproduction.
26. The series of changes that take place in the shape
of the lens and the eyeball in response to the distance
of an object from the eye.
27. The part of the brain that controls the heart rate.
28. The maintenance of a constant internal
environment in the body within certain limits.
29. The plant hormone that promotes seed dormancy.
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