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.
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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
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.
A slipper limpet can change its sex from female to male
Indicate whether the statement is true or false.
What is rapid shallow breathing called?
A) dyspnea B) hyperpnea C) tachypnea D) eupnea E) apnea