The Cambrian Explosion resulted in the evolution of the first

A) Dinosaurs and mammals

B) Representative of most animal phyla

C) Bacteria

D) Land animals

Which best describes the order of the technology used to transmit a sound through the radio? microphone → transmitter → microphone radio → transmitter → radio radio transmitter microphone microphone → transmitter → radio

Amoeba and phytoplankton differ in that phytoplankton can

Why must an organism have the same amount of adenine as thymine

How is the process of natural selection involved in evolution?

Hospitals are interested in ocean research because; the ocean floor is rich with oil and natural gas, oysters are a valuable source of copper, powerful anesthetics are found in marine organisms, fish are a valuable source of protein

Which of the following correctly describes homeostasis in protists? (A) Paramecium maintain homeostasis by swelling and bursting (B) Vacuoles allow water to enter and exit the paramecium (C) Flagella allow paramecia to move through a substance (D)

List 4 observations that indicate that a chemical reaction may be taking place

Which statement describes the light reaction of photosynthesis? A. Water molecules are combined to make food. B. Air and water create energy for a plant. C. Carbon dioxide is put together with glucose. D. Water molecules are split apart.

4. Where are the two places we find receptor proteins? Inside the target cell, target cell plasma membrane Signaling cell plasma membrane, inside the target cell Signaling cell plasma membrane, ligand Target cell plasma membrane, signaling cell

What most directly causes hypertension? lack of blood flow to the heart a weakening of a blood vessel wall excessive force of blood pumping injury to heart muscle