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.

Source of oxygen for fish in water

A breeder wants to set up a program to produce zebrafish with long fins. Having long fins is a dominant trait compared to the short-finned wild type.

Which of the following would lead to greater biodiversity? A) a community where two species control resources B) a community where competition between species is high C) an open community with some different species who can come and go D) a closed

Why do plants not grow in the bottom of the oceans?

Do you agree with the statement bush meat trade threatens african wild life

What was lyells experiment?

What is the illness where you get: blurred vision, shaky hands, tired, weak, pale, blood glucose high, stomach ache, low insulin, low appetite, jaundice, no urobilin in urine, not urobilinogen, excess cortisol secretion, high level of bilirubin,

Which of the following is an accessory organ of the integumentary system? a. corium b. sebaceous gland c. thyroid gland d. epidermis

What can people do to stay safe before and during a rainstorm with high winds and heavy rains?

The female sex cells or eggs are produced by