Biology Semester Review 4: Question Preview (ID: 9678)

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_____ are the main organs in keeping water balance in mammals and birds.
a) Lungs
b) Gills
c) Kidneys
d) Hormones

Platelets are helpful in _____.
a) fighting disease
b) removing carbon dioxide
c) digesting food
d) clotting the blood

Which of the following body parts is about the size of a human fist?
a) the heart
b) the small intestine
c) the cornea
d) the cochlea

Which blood vessels carry blood to the heart?
a) capillaries
b) arteries
c) plasma
d) veins

What is the principal function of digestive enzymes?
a) regulating gland secretions
b) fighting disease
c) breaking down food
d) absorbing nutrients

Almost half our blood consists of _____.
a) white blood cells
b) antibodies
c) red blood cells
d) capillaries

Living things come only from other _____.
a) eggs
b) sperm
c) living things
d) chromosomes

DNA is a chemical found in the _____ of organisms.
a) traits
b) characteristics
c) population
d) cells

After mitosis has occurred, _____ new cells have been formed.
a) no
b) two
c) three
d) four

Eggs and sperm are called _____.
a) ovaries
b) chromosomes
c) gametes
d) zygotes

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