Gravitropism is a growth response of plants that implies that plant stems grow up and roots grow downward. This is assisted by structures in the root caps that act as gravity sensors. These are called:
A plant with parallel veins and floral parts in threes would be classified as:
Some flowering plants will self-pollinate and self-fertilize, the most extreme form of inbreeding. What is the major disadvantage of this lifestyle for such plants?
A liver fluke infection is most commonly found in persons who:
eat undercooked fish.
According to modern animal phylogeny based on molecular data, nematodes fall into which of these groups?
Dry fruits that have wing-like structures (eg: maples) or parachute-like structures (eg: dandelions) usually aid seed dispersal by: