What important event in animal evolution marks the beginning of the Cambrian period?

the ability to swim

the ability to fly

the appearance of hard parts

the appearance of fossils

Which cranial nerve is responsible for the motor innervation of pharyngeal muscles and parotid salivary glands?

In which of the following ways do the cell membranes of Archaea differ from the cell membranes found in bacteria?

These theorists believe that morning sickness prevented the mother from eating spoiled meat or toxic plants, which could damage the developing embryo.

Evolutionary theory views change as a process that moves towards simplicity true or false

Biology students used raw eggs in an experiment on tonicity and osmosis. The students put their eggs into vinegar to remove the shells. The vinegar was used to remove the shell form the raw egg.

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

Many people in the developing world who depend on rice in their diet suffer from diseases related to deficiencies of

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?