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

Define strong nuclear

Who has no membrane bound organelles?

if a television with mass 15kg is lifted to a shelf of height 1.2 m how much gravitional potential energy is added to the television. A. 1024.2j. B176.4j. C18.0j. D:2646j

Why do squirrelfish only contain 1% salt

A surgical client is receiving a neuromuscular junction (nmj) blocker. the nurse knows that the client cannot move because the client's acetylcholine receptor sites have been stimulated and the drug is remaining in the receptor sites, preventing

What property of water explains why large bodies of water do not quickly fluctuate in temperature?

Based on skin cancer facts, provide a persuasive argument to convince your friend to avoid sunburns

Evolution is: A) A change in the composition of a population from one generation to the next. B) A phenomenon that must be inferred from evidence, because it cannot be observed directly.

What kind of bond holds together atoms within a molecule? nuclear bond ionic bond covalent bond electron bond

A new type of worm was discovered in some bananas on a cargo ship.