What is the chance that a human zygote will receive one X and one Y sex chromosome during fertilization?

What is the most common method of producing energy for an ecosystem? What is the energy that is made?

Which statement is true about Earth's poles? A. Geographic poles are defined by Earth's rotation. B. Magnetic poles are defined by Earth's rotation. C. Earth's geographic South Pole moves about 10 km each year. D.

This developing plant uses starch stored in the seed as a source of energy during germination. This stored starch is a by-product of

True or false? low doses of cns depressants can cause sedative effects and relaxation.

What would be the blood type of a person who inherited an A allele from one parent and an O allele

In most medical procedures, hazardous waste is produced. This waste is usually burned, which can release chemicals like mercury into the air. How could technology be best used to solve this problem?

Primitive anaerobic prokaryotic cells did not contain which of the following? A) mitochondria B) DNA C) cell membranes D) RNA

Which of the following is most important in forming ATP? A. sulfur B. helium C. phosphorus D. boron

Who does aerobic respiration

What is a spiderweb like membrane that covers the organs