What is a cross-bridge?
a. a protein found along the groove of the F-actin double helix
b. a T tubule and two adjacent terminal cisternae
c. the combination of myosin heads with active sites on actin molecules
d. the movement of myosin head while attached to actin myofilament
e. after exercise, the oxygen taken in that exceeds the oxygen required for resting metabolism

Match the following terms and definitions. 1. transcription when genes are neither dominant nor recessive and display a blending of traits in the phenotype 2. translation converting the genetic code into the language of proteins 3. monohybrid cross genes that are carried on the x chromosome 4. incomplete dominance the transfer of genetic code from dna to an rna molecule 5. sex-linked genes the breeding of two organisms which differ in a single trait

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen