Projections from the cell wall of the root epidermis are called

A. root hairs
B. cortex cells
C. root caps
D. casparian strips


Ans: A. root hairs

Biology & Microbiology

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The complementary sequence to the DNA template 5'-ATACGCT-3' is 3'-TATGCGA-5'

Indicate whether the statement is true or false.

Biology & Microbiology

A graduate student is studying the feeding behavior of a small octopus that must be laboriously collected from the shores of a remote island. Her intern wishes to do experiments to look at the octopus’s mating behavior. Why might the graduate student veto this idea? 

A. The octopus has semelparous reproduction, and will eat its mate. B. The octopus has iteroparous reproduction, and will eat its mate. C. The octopus has semelparous reproduction, and will die after laying one batch of eggs. D. The octopus has iteroparous reproduction, and will die after laying one batch of eggs.

Biology & Microbiology

Which germ layer gives rise to the muscle layer of the uterus?

A) Endoderm B) Ectoderm C) Mesoderm

Biology & Microbiology

In general, the LD50 for exotoxins is much greater than the LD50 for endotoxins

Indicate whether the statement is true or false

Biology & Microbiology