Grade 12 Life Sciences NSC Paper 1
Terms questions and answers 2024\2025
A+ Grade
chorion
- correct answer The membrane that together with the endometrium, forms the placenta. / The
outermost extra-embryonic membrane surrounding the embryo.
pregnancy
- correct answer The period of development of an embryo in the uterus between fertilisation and birth.
diabetes mellitus
- correct answer Disease characterised by a lack of insulin production.
eustachian tube
- correct answer Tube that connects the pharynx and the middle ear. / The structure in the ear that
equalises the pressure on either side of the eardrum.
eutrophication
- correct answer A process by which nutrients become highly concentrated in a body of water, leading to
increased growth of organisms such as algae. / The accumulation of nutrients in ponds from the over-
use of fertilisers on land, stimulating excessive growth of algae.
blastocyst / blastula
- correct answer A stage in the development of humans in which the embryo consists of a layer of cells
surrounding a cavity. / A hollow ball of cells formed from the zygote
acrosome
- correct answer The part of the sperm cell that contains enzymes to digest the membrane of the ovum
, prostate gland
- correct answer The gland in the male reproductive system of humans that produces an alkaline fluid to
counteract the acid environment of the vagina.
vas deferens / sperm duct
- correct answer The duct leading from the testis to the urethra in human males. / The tube in the male
reproductive system that connects the epididymis with the urethra
oogenesis
- correct answer The process by which the ovum is formed through meiosis in the ovary.
meninges
- correct answer The membranes which protect the central nervous system. / Collective name for the
membranes that protect the brain and spinal cord.
gibberellins
- correct answer A plant growth hormone that stimulates seed germination.
peripheral nervous system
- correct answer The nervous system which consists of cranial and spinal nerves
parasympathetic
- correct answer A branch of the autonomic nervous system that decreases the heartbeat back to
normal.
aldosterone
- correct answer The hormone that regulates the salt concentration in the human body
umbilical vein
- correct answer A blood vessel in the umbilical cord that transports nutrients + oxygen rich blood to the
foetus.
TSH (Thyroid Stimulating Hormone)
- correct answer The hormone inhibited by an increased level of thyroxin.
Terms questions and answers 2024\2025
A+ Grade
chorion
- correct answer The membrane that together with the endometrium, forms the placenta. / The
outermost extra-embryonic membrane surrounding the embryo.
pregnancy
- correct answer The period of development of an embryo in the uterus between fertilisation and birth.
diabetes mellitus
- correct answer Disease characterised by a lack of insulin production.
eustachian tube
- correct answer Tube that connects the pharynx and the middle ear. / The structure in the ear that
equalises the pressure on either side of the eardrum.
eutrophication
- correct answer A process by which nutrients become highly concentrated in a body of water, leading to
increased growth of organisms such as algae. / The accumulation of nutrients in ponds from the over-
use of fertilisers on land, stimulating excessive growth of algae.
blastocyst / blastula
- correct answer A stage in the development of humans in which the embryo consists of a layer of cells
surrounding a cavity. / A hollow ball of cells formed from the zygote
acrosome
- correct answer The part of the sperm cell that contains enzymes to digest the membrane of the ovum
, prostate gland
- correct answer The gland in the male reproductive system of humans that produces an alkaline fluid to
counteract the acid environment of the vagina.
vas deferens / sperm duct
- correct answer The duct leading from the testis to the urethra in human males. / The tube in the male
reproductive system that connects the epididymis with the urethra
oogenesis
- correct answer The process by which the ovum is formed through meiosis in the ovary.
meninges
- correct answer The membranes which protect the central nervous system. / Collective name for the
membranes that protect the brain and spinal cord.
gibberellins
- correct answer A plant growth hormone that stimulates seed germination.
peripheral nervous system
- correct answer The nervous system which consists of cranial and spinal nerves
parasympathetic
- correct answer A branch of the autonomic nervous system that decreases the heartbeat back to
normal.
aldosterone
- correct answer The hormone that regulates the salt concentration in the human body
umbilical vein
- correct answer A blood vessel in the umbilical cord that transports nutrients + oxygen rich blood to the
foetus.
TSH (Thyroid Stimulating Hormone)
- correct answer The hormone inhibited by an increased level of thyroxin.
