The are saclike structures that facilitate gas exchange in the respiratory zone.

What type of plant is good for a bioassay and where can i buy it? i only have a month.

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root

Why should organisms reproduce more offspring than will survive? select all that apply.