Double fertilization in flowering plants refers to ________

a. two sperm fertilizing a single egg
b. two sperm fertilizing two eggs
c. a single sperm fertilizing two eggs
d. a sperm fertilizing an egg and another sperm fertilizing the endosperm mother cell


d

Biology & Microbiology

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The largest documented mass extinction on Earth occurred:

A. 252 million years ago. B. 25 million years ago. C. 6.5 million years ago. D. 65 million years ago. E. 650 million years ago.

Biology & Microbiology

Which of the following prokaryotic nutritional

groups use organic substances for both carbon and energy? a. photoautotrophs b. chemoautotrophs c. photoheterotrophs d. chemoheterotrophs e. none of these

Biology & Microbiology

Telomerase reads ________ as a template and synthesizes ________ as a product

A) DNA; DNA B) DNA; protein C) RNA; RNA D) RNA; DNA E) DNA; RNA

Biology & Microbiology

buffer

What will be an ideal response?

Biology & Microbiology