A mass of undifferentiated plant cells is called a callus

____________________ Indicate whether the statement is true or false.


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Biology & Microbiology

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Describe the structure of a DNA microarray and its use

What will be an ideal response?

Biology & Microbiology

Positive feedback systems restore homeostasis. Indicate whether the statement is true or false

Biology & Microbiology

 Upon ingestion of a food particle by a protozoan, the food particle is in a(n) ________.

A. mitochondrion B. endoplasmic reticulum C. phagocytic vacuole D. lysosome

Biology & Microbiology

The hormone prolactin, found in distantly related vertebrates, exerts different effects in different species. From an evolutionary standpoint, this is an indication that prolactin

A) can only have functions related to childbirth. B) is an ancient hormone whose function diversified through evolution. C) was a recent evolutionary adaptation. D) was not required in fish and amphibians.

Biology & Microbiology