Animals have an excretory system that eliminates all wastes except?

A) oxygen

B) carbon dioxide

C) ammonia

D) nutrients

A scientist is examining a fossilized insect that may be an ancestor of modern dragonflies. Which of the following should the scientist compare to best determine how closely related the fossilized insect is to modern dragonflies?

A gray wolf's sperm contains 393939 chromosomes. He mates with a female gray wolf. How many chromosomes will there be in the resulting zygote?

which part of the central nervous system is used to serve as the main communication link between the body and the brain

Scientists hypothesize that there are no dinosaurs alive today because

Which class of organic molecules provides long-term energy storage

Explain how nephrons deal with plasma protein such as Albumin in afferent arterioles from normal or healthy individuals and patients with renal failure

What cell is located on the surface of an endoplasmic reticulum?

This condition involves progressive demyelination of neurons in the CNS accompanied by the destruction of oligodendrocytes. As a result, the conduction of nerve impulses is disrupted, leading to impaired sensory perception and motor coordination.

Describing Spiral Galaxies Why are spiral galaxies so bright

List four factors that can cause slope or land movements