A person is swimming when a fish touches his foot. his heartbeat and breathing increase for a few seconds until he realizes the fish is harmless. which part of the nervous system returns his heartbeat to norma

What type of consumer is a python?

Protists with complex bodies covered with hair-like structures known as cilia are called a. amoebas. b. paramecium. c. dinoflagellates. d. euglenoids.

The cell walls of plants and algae have openings, or channels. How is this structure most likely related to the functioning of a plant system? It provides further support to the cell by making the cell wall more rigid.

Cerise is a schoolteacher. She is teaching her students that chemicals dumped in the ocean have adverse consequences on humans.

Which set of legs appears best adapted to carry an incubating egg mass?

Aquaculture cannot reduce the number of fish caught in the wild. a. True b. False

Why does the reporter have a tube up his nose? to accurately measure core temperature True or False

Charles Goodyear was a scientist who was looking for ways to keep rubber from melting in the summer heat and becoming brittle in the winter cold. He discovered the solution by accident when someone left a sample of rubber and sulfur on the stove.

Discuss why scientists know so little about Precambrian Earth

If two elements are in the same chemical family then what can be predicted about their Spectra