Which is NOT a part of the immune system?

a. Skin

b. Stomach acid

c. Mucus

d. Fingernails

The smallest functional found within a cell are called

The site where a somatic motor neuron releases acetylcholine to stimulate a skeletal muscle fiber is called the

Darren performed an experiment in which he measured the amount of force that was required to accelerate an object at a rate of 5 m/s2. Then, he repeated his experiment four more times and calculated the average force that was needed.

The main difference between a prokaryotic cell and a eukaryotic cell is

A skull from the genus homo that dates

Nucleotide are composed of phosphate group, a sugar, and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide? A. the sugar B. the phosphate group C. the nitrogen group D.

What organ system detects stimuli, secretes chemical and electrical signals, and controls all other organs

Which tissue type allows for organ movement within the body

Explain the role of enzymes and how they affect the chemical reactions of living things

Many arthropods young do not look like adults and do not eat the same food as adults. how would this be an advantage in an environment where food is scarce