What is responsible for respiration in fish

lungs

gills

tracheae

skin

How much energy, in kJ does a 75 watt light bulb use when it is on for 25 minutes

What are the seven properties that define life

Which of these is a central purpose of steroids in mammals? Choose the correct answer. A) They form protective coatings. b) They serve as chemical messengers. c) They provide most of the energy for a cell.

Which substance most likely consists of atoms that are able to slide past one another? ice honey wood cotton

How does blood pressure affect blood flow?

Why does biology have to be a subject

Differential reproduction of genotypes leads to evolution via what process? inbreeding natural selection genetic rescue genetic drift mutational load

Why is carbon essential to all known life on Earth?

Why are only inherited traits involved in the process of evolution?

What are uses of nuclear power?