The A band of skeletal muscle is formed by noncovalent cross-bridges between the thin filaments that are mainly and the thick filaments that are mainly .

Nucleus has two lobes; contains granules of lysosomal enzymes; functions in attacking parasitic worms and plays complex roles in inflammatory diseases like allergies and asthma. what blood cells are described?

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

Match each term to its scientific definition. a)natural world b)scientific method c)theory 1) everything that can be observed or explained scientifically 2) a well-supported explanation of all the evidence related to a natural phenomenon 3) the procedure of scientific inquiry used to investigate natural phenomena