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

Which statement most accurately describes what happens to proteins that lack an ER signal sequence? They are inserted into the ER membrane but do not enter the ER lumen. They are inserted into the plasma membrane.

A liger is the offspring of a male lion and a female tiger. male ligers cannot produce offspring. this is an example of

Where specifically in the chloroplast do the light reactions and the dark reactions of photosynthesis occur?

Which of the following correctly organizes these genetic terms in order from smallest to largest? A:chromosome, gene, nucleotide, DNA B:nucleotide, gene, DNA, chromosome C:DNA, nucleotide, gene, chromosome D:DNA, nucleotide, chromosome, gene

As a person ages the size of the tonsils?

What is a scientific species designation

During cellular respiration, energy is converted from one part of the plant to another. the mitochondria to the nucleus. glucose to packets of stored energy in the organism. light to chemical energy. c @kendallcrider,

Which abiotic factors are associated with a temperate forest? A) Warm temperatures and rain year-round B) Moderate temperatures and little rain C) Cold temperatures and low total precipitation D) Moderate temperatures and moderate precipitation

Capsular hydrostatic pressure is the chief force pushing water and solutes out of the blood and across the filtration membrane. (True/False)

What does it mean when a biologist uses the term crossing-over? why is crossing over a good thing?