Modern humans first appeared during the

A. most recent period of the Cenozoic era.

B. most recent period of the Mesozoic era.

C. earliest period of the Cenozoic era.

D. earliest period of the Mesozoic era.

Proteins are the building blocks of life. Every cell in the human body contains protein. Which organelles are likely to be abundant in cells such as fibroblasts that actively produce and secrete protein which fuel cells, tissues, and organs?

Classify a pet dog as an autotrophs or heterotroph and as an herbivore, carnivores or omnivores explain

Systolic and diastolic blood pressures are affected differently by exercise? what could account for the difference?

1. Where is the most energy found in an ATP molecule?

What is name given to the regularly spaced infoldings of the sarcolemma? view available hint (s) what is name given to the regularly spaced infoldings of the sarcolemma?

A marine biologist explains that the salmon adapts to its environment through descent with modification. What is "descent with modification"? A heritable trait can be changed from one generation to another.

What component of Earth's atmosphere exists entirely as a result of photosynthesis?

1: In general, surface water always flows A. downhill. B. from north to south. C. toward the equator. D. from south to north.

A lens located directly above the stage. Many microscopes have more than one objective to provide a range of viewing magnifications. Cognitive lens Orbital lens Complex lens Objective lens

What would happen to animal cells if they had cell walls like plant cells?