Efficiency is

a.

the percentage of energy lost to the surroundings as heat.

b.

the percentage of energy that is actually used to perform work.

c.

the entire amount of energy.

d.

the time it takes for half of the energy to be used.

What are the inner planets known as?

Describe how selective breeding could be used to improve the racing ability of horses

What is the flow rate of a freshwater biome

Which group of words are energy sources for muscles? A. Synovial membrane, conjunctiva B. Genus valgus, esotropia C. ATP, creatine phosphate D. Osteoarthritis, presbyopia

What is a flexible covering that surrounds the animal cell?

Which characteristic property allows multicellular algae, like red, green, and brown algae, to make the maximum use of sunlight?

Which of these is not true of living cells

What std is caused by the bacterium treponema pallidum and is highly contagious?

What is the name of the tear drainage channel that extends from the lacrimal sac to the opening in the mucous membrane of the nose?

Which of the following lists the terms from simplest to most complex? organs, organ system, organism, cells, tissues tissues, organs, organ systems, organism, cells organ systems, tissues, cells, organism, organs cells, tissues, organs, organ