The formation of a cyst enables a protozoan to
a. move
b. synthesise protein
c. survive in the external environment
d. increase rapidly in number
Answer: c. survive in the external environment
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Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation
a. True b. False Indicate whether the statement is true or false
The outer layer of gray matter that covers the cerebral hemispheres is called the cerebral
A. cortex B. callosum C. meninx D. fissure
Mendel performed a testcross with his plants and all the resulting progeny had the same colour. What information did this testcross provide?
a. The parent with the dominant trait is heterozygous. b. The parent with the dominant trait is homozygous. c. The parent with the recessive trait is heterozygous. d. The parent with the recessive trait is homozygous.
A defining characteristic of allopatric speciation is
A) the appearance of new species in the midst of old ones. B) asexually reproducing populations. C) geographic isolation. D) artificial selection. E) large populations.