Which substances are responsible for accelerating chemical reactions in cells?

a) amino acids

b) enzymes

c) nucleic acid

d) lipids

Which two cellular structures provide protection to the cell

Compare salt marshes and mangrove forests and explain why mangrove forests are such critical habitats on high energy coasts.

When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation number decreases B. Its oxidation number doubles. C. Its oxidation number increases. D. Its oxidation number increases by one. E.

Dan was running and he tripped and hurt his knee. the pain signals were carried to his brain by the?

What is the relationship between wavelength frequency and wave speed

What do a broken rode and a volcano eruption have in common

What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?

All of the following shows density and buoyancy except: A. ice cubes floating in a glass of iced tea B. the amount of hot soup contained in a bowl C. a hot air balloon moving through the air D. a boulder resting at the bottom of the ocean

A 61 kg skier on level snow coasts 184 m to a stop from a speed of 12 m/s. (a) Use the Work-Energy Theorem to find the coefficient of kinetic friction between the skis and snow.

A zebra starts from rest and accelerates at 1.9 m/s2 what will be the acceleration after 5 seconds