Gas exchange in most land plants occurs through structures called

A) stomata.
B) apical meristems.
C) vascular tissue.
D) cuticles.


Answer: A

Biology & Microbiology

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Lipopolysaccharides are a common class of T-dependent antigens.

Answer the following statement true (T) or false (F)

Biology & Microbiology

If van der Waals forces are weak, how can geckos utilize these forces to cling to and walk up vertical

smooth surfaces?

What will be an ideal response?

Biology & Microbiology

The extraembryonic membrane that contains fluid to cushion and protect the embryo is the __________

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

Biology & Microbiology

Which of the following statements regarding active transport is false?

A) Active transport uses ATP as an energy source. B) Active transport can move a solute against its concentration gradient. C) Active transport requires the cell to expend energy. D) Active transport is driven by the concentration gradient.

Biology & Microbiology