Which of these is not a structure found in prokaryotic cells? A. a defined nucleus B. ribosomes C. cytoplasm D. cell membrane

What happens if you stirred the water and sugar in a glass?

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? A) They study alleles that contain chromosomes, which are RNA.

Imagine that the farmlands in illinois and new york have been abandoned. After 300 years how will the vegatation on these lands differ?

Select the correct answer, in Watson's Little Albert Experiment, what does the loud metal clanging noise represent? A. a neutral stimulus B. an unconditioned stimulus C. an unconditioned response D. a conditioned stimulus E. a conditioned response

How dou you know that species are different

How a biologist's reseach can proceed from an idea to a published article

How many times do the nostrils of a frog open and close in one minute

What regulates the enzymes present in an organism A. Phenotype B. Genotype C. Proteins D. Carbohydrates

What is the importance of the excretory system?

What are four sources of minerals?