By which of the following mechanisms can a cell transport a substance from a lower to a higher concentration?

A) facilitated diffusion

B) aquaporins

C) extracellular enzymes

D) active transport

E) simple diffusion

What tool could you use to determine who is the fastest swimmer in your class

Infer which might be a weakness of traditional food webs when they are applied to complex ecological problems? a) A food web does not represent all the links in the environment. b) Food webs do not account for non-native species in the environment.

What would be a concern associated with human cloning endangerd species?

How do the three types of colorblindness differ in genotype and phenotype?

g All base pairs in the genome are replicated during the DNA synthesis phase of the cell cycle, but only some of the base pairs are transcribed into RNA. How is it determined which base pairs of the genome are tran - scribed into RNA

8. Cystic fibrosis is caused by a recessive allele. The frequency of this allele is 0.1 in a population of 2,500. a. What is the frequency of the dominant allele? b. How many people in this population will have cystic fibrosis? c.

Which part of the brain controls conscious activities, memory, language and the sense?

Which intestinal disorder is characterized by the colon overresponding to normal stimuli, which causes alternating patterns of constipation and diarrhea?

The gene has a frameshift mutation, where the fifth sequence in the base is deleted. write the new DNA base sequence

Sexual reproduction involves the processes listed below. which sequence represents the order in. which these processes occur