Which description is correct for both oogenesis and spermatogenesis?

a. The cells have 46 chromosomes until meiosis Il is completed.
b. After meiosis I, the cells have 23 chromosomes.
c. Part of meiosis l is completed before birth.
d. The entire process takes about 70 days.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

The unique structure of the neuron is dedicated to the efficient and rapid transmission of neural signals. the relationship between neurons, the spinal cord, and the brain constitutes an elaborate communication system throughout the human body. all but one of the functions listed below are a result of this interaction.

A(n) is a molecule influences the way that a molecule reacts.