What structure prevents water from moving between cells of the endodermis of the plant root?
a. Casparian strip
b. Okazaki fragments
c. sclerids
d. collenchyma
e. sclerenchyma
A
Biology & Microbiology
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If there are 20 chromatids in a cell, how many centromeres are there?
A) 10 B) 20 C) 30 D) 40 E) 80
Biology & Microbiology
When there have been no non-disjunction errors and an individual has the appropriate number of chromosomes for their species, what is this condition called?
a. aneuploidy b. trisomy c. euploidy d. polyploidy
Biology & Microbiology
What external layers must a sperm penetrate in order to fertilize the egg?
What will be an ideal response?
Biology & Microbiology
Gametophyte plants produce gametes using:a
mitosis. b. meiosis. c. fertilization. d. polyploidy. e. sporogenesis.
Biology & Microbiology