location

In phloem, water and solutes always move from ______.

The image above shows a plant root; the dark purple areas are root cells that have been colonized by the nitrogen-fixing bacteria Rhizobium. Rhizobium bacteria can enter plant roots and initiate a root nodule because [a]. As a result of the bacteria, the plant experiences [b].

What is the primary reason gills are more efficient at extracting oxygen from the respiratory medium than lungs are?

All of the following are examples of asexual reproduction EXCEPT _____.

A chemical binds to the acetylcholine receptors on muscles and prevents acetylcholine released from the motor neuron from binding to the receptors. What impact would this have on the muscle?

Carnivorous plants obtain a crucial resource by trapping and digesting animals. What is the primary thing carnivorous plants obtain from their prey?

Above is a cross-section of a potato. Certain structures have been labeled to help you identify them. Based on the structures you see and their locations in the potato, you can conclude that a potato is a modified _______.

Acid rain can cause soil acidification. Plants that are exposed to acid rain often have stunted growth and show symptoms of nutrient deficiency. What is the primary reason acid rain has these negative impacts on plants?

Which of the following can be considered an adaptation that facilitates sexual reproduction of animals in dry, terrestrial conditions?