Once a pollen grain reaches the stigma of a flower, it begins to grow a(n) ________ that pierces the style.

Fill in the blank(s) with the appropriate word(s).


pollen tube

Once a pollen grain reaches the stigma of a flower, it begins to grow a pollen tube that pierces the style.

Biology & Microbiology

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A cougar chases its prey. Running is a form of ________

A. potential energy B. kinetic energy C. heat loss D. entropy E. chemical energy

Biology & Microbiology

Which of the following is true regarding sympatric speciation?

A. Sympatric speciation requires physical separation of two populations. B. Sympatric speciation requires a selective disadvantage of hybrids (e.g., medium-billed birds) of two diverging populations.

Biology & Microbiology

A slipper limpet can change its sex from female to male

Indicate whether the statement is true or false.

Biology & Microbiology

What is rapid shallow breathing called?

A) dyspnea B) hyperpnea C) tachypnea D) eupnea E) apnea

Biology & Microbiology