B=black and b=brown. A Bb guinea pig crosses with a Bb guinea pig, and four offspring are produced. All of the offspring are black. Explain how this could happen

When non nerve cells become invoved in response to signals whitch tipe of receptor gose into action

Which statement best compares aerobic and anaerobic respiration

Xylem's main function is to transport _[blank]_. amino acids and proteins water and inorganic nutrients sugars and starch fats and oils

What happens to the blood vessels in hot and cold weather?

What type of microscope is used to show the fine detail of cell organelles, as well as the spindle fibers and chromosomes as seen during anaphase?

Gases such as oxygen and carbon dioxide cross the plasma membrane by

Describe how a cell produces and releases proteins.

During a trip to Galapagos island which Observation led Charles Darwin to suspect that organisms change over time

Prudence and Charity are twins raised at the center of a rotating kingdom. Charity goes to live at the edge of the kingdom for a time and then returns home. Discuss which twin is older when they rejoin.

Sue has normal hearing but her sister suffers from deafness determined by a rare recessive allele. what is the probability that sue's phenotypically normal daughter is heterozygous for the gene?