The protein channel illustrated in model three is a ligand gated channel. What must occur for the gate to open and allow movement of ions across the membrane?

How is the male reproductive system different from other body systems? it isn't necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another.

Great amounts of energy are released in the core of a star as lighter elements combine and form heavier elements during the process of (1) compaction (2) condensation (3) radioactive decay (4) nuclear fusion

A group of somatic stem cells lie along the basement membrane of the respiratory epithelium and give rise to both ciliated pseudostratified columnar cells and goblet cells (mucus-producing cells). this is an example of replacement of tissues by:

Will the genotype or phenotype of a gene change when a mutation occurs

What are the characteristics of carbohydrates

Which important property of DNA did Friedrich Miescher discover? -It is made partly of sugar molecules. -It has a double-helix structure. -It is three-dimensional. -It is found in the nucleus of a cell.

2. What is meant by predation? What is the relationship between a predator and a prey?

Sex-linked recessive disorders are most often passed from mother to sons

Bacteria can grow on meat that has not been cooked to the proper temperature and can cause food borne illnesses. Question 1 True False i think its false

What cause the loss of wetlands