HL Biology Unit 7: Plant Biology

Where does pollination occur?

What directly ensures a continuous column of water in the xylem during water transport?

Which structure is NOT involved in gas exchange?

Which leaf tissue contains densely packed cells with abundant chloroplasts?

Which of the following has a negative correlation with transpiration rate?

What directly activates expansin (during cell elongation)?

A fertilized ovule develops into a

What strengthens the xylem to be able to withstand tension?

How does water enter into the roots?

Which of the following is NOT required for germination?

What is structure A?

Water is drawn from the phloem back into the xylem when pressure is _____ and sap is _____.

Which of the following is true?

Which is NOT a self-incompatibility mechanism (for promotion of cross-pollination)?

The release of ethylene from one fruit causes the release of ethylene from adjacent fruits, demonstrating:

Active transport during phloem loading at the source causes the sap to be

Which phytohormone promotes hydrogen ion secretion into the apoplast (during cell elongation)?

Capillary action creates tension (a _______ pressure) that causes water to move up the xylem.

What is structure D?

Auxin is produced in the _____ and cytokinin is produced in the _____.

During phototropism, auxin builds up on the _____ of a plant.

How do mineral ions enter into the roots?

Which of these is NOT a characteristic of a companion cell?

What structure is the anther?

What is structure D in this root cross-section?

Sugars will flow:

What connects a sieve tube cell and its companion cell?

Auxin enters cells through _____ and exits cells through _____.

What is structure E?

In order to ensure adequate water uptake, root cells should be _______ to the soil.

Double fertilization produces a _____ zygote and a _____ endosperm.