Proteins in the plasma membrane:

A. may act in cell-to-cell recognition

B. may serve as carriers

C. may serve as hormone receptors

D. all of these

Which statement best describes the function of the mitochondria? A. They build and transport proteins. B. They allow for cellular motility. C. They provide an outside barrier to the environment. D. They assist with cellular respiration.

What do scientists use to apply cladistics? homologous traits homoplasies analogous traits monophyletic groups

In order for your brain to deal effectively with the information it receives from your senses, it must ignore some.

What does the foramen ovale become at birth?

Observation:most car owners prefer cars that use Petrol instead of CNG Hypothesis:

Which of a cell's organelles releases energy stored in food?

A scientist examines a fruit fly gene involved in the regulation of body development

The rate of metabolism is regulated by which hormone? A. PTH B. Aldosterone C. Thyroxin D. Calcitonin

Which systems does your skeletal system coordinate with to allow you to move?

In which two habitats would you expect to encounter the most similar community assemblages?