Biology Questions and Answers

Exosmosis is the movement of water outside the cells when a cell is placed in a hypertonic solution.

The cell becomes flaccid when the water moves outside.

• The most familiar invertebrates include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca and Arthropoda.
•  Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord.

The functional group in a food chain include:

Primary producer → Primary consumer → Secondary consumer

Grass, grasshopper, toad, snake, hawk

• cold-bloodedness.
• The teeth of reptiles are also less specialized in function than are mammalian teeth.
• a dry skin with scales but not feathers (a characteristic of birds) or hair (a characteristic of mammals);

NB: Birds do not have teeth, although they may have ridges on their bills that help them grip food.

       Birds swallow their food whole, and their gizzard (a muscular part of their stomach) grinds up the food so they can digest it.

Wind-pollinated flowers:

• No bright colors, special odors, or nectar.
• Small.
• Most have no petals.
• Stamens and stigmas exposed to air currents.
• Large amount of pollen.
• Pollen smooth, light, easily airborne.
• Stigma feathery to catch pollen from wind.