How does a palisade cell differ from the other cells in the same plant?
Choices
Choice (4)
a.
It has a large nucleus.
b.
It has a large vacuole.
c.
It has a cell membrane.
d.
It has more chloroplasts.
Answer
d.
Explanation
Mesophyll is divided into two regions - Palisade spongy upper surface. tissue and parenchyma. Palisade tissue is found towards
These cells have more chloroplasts and spongy parenchyma is found towards lower surface intercellular spaces are well developed between cells of spongy parenchyma.
The diagram shows the human female reproductive system.
If a woman uses IUDs as a contraceptive, where would it be placed?
The Human Female Reproductive System
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Choices
Choice (4)
a.
Diagram C
b.
Diagram D
c.
Diagram A
d.
Diagram B
Answer
d.
Explanation
Intrauterine devices (IUD’s):
An intrauterine device is a small object made up of plastic, copper, stainless steel that is inserted by a health care professional into the cavity of the uterus. These devices are presently very popular. These are presently available as non-medicated IUD’s such as Lippe’s loop, copper releasing IUD’s Eg: Cu T, Cu 7, Multiload 375 and some of the hormone releasing IUD’s Eg: Progestasert, LNG-20.
IUD’s increase phagocytosis of sperms within the uterus and the Cu ions, which are released, suppress sperm motility as well as the fertilizing capacity of sperms. The hormone releasing IUD’s make the uterus unsuitable for implantation and the cervix hostile to the sperms. IUD’s are ideal methods of methods used by females.
