The physiological cause for rigor mortis is the lack of to release cross bridge formation.

lack of ATP

Explanation: Muscles need ATP in order to release from contracted state

when an organism die the reactions that recycle ATP eventually comes to a halt .

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.