Human body cells each have 46 chromosomes in the nuclei. meiosis is necessary in order to ensure that each gamete produced in the human body has

A) 12 chromosomes

B) 23 chromosomes

C) 46 chromosomes

D) 92 chromosomes

In an effort to control vegetation overgrowth, 100 rabbits are released in an isolated area that is free of predators.

Which of the following is NOT a step used by cytotoxic T cells to kill infected host cells? a) Secretion of granzyme b) Recognition of infected host cell using its TCR c) Secreting antibody specific against the pathogen. d) Secretion of perforin.

Volcanic eruptions changes in earths orbit meteorite impact and even the combustion of fossil fuels ALL contribute directly or indirectly to climate change by

Which of the following best defines the Theory of Natural Selection? A) Organisms that are the biggest and the strongest always survive. B) The smallest organisms in a population are always eliminated by the biggest organisms.

What senses is associated with the temporal lobe?

Which vessels allows for oxygen movement into the tissues

What is the difference between a physical and a chemical change

What is described by binary fission? A) The way prokaryotes move. B) The way prokaryotes produce energy. C) The way prokaryotes reproduce. D) The way prokaryotes digest nutrients.

There are many different ecological and environmental conservation methods. Which is not a conservation method? A) water harvesting B) fishing seasons and limits C) limiting of clear cutting of forests D) wind and wave erosion on coastal areas

Explain when and how dire wolves became extinct.