A. Genes involved in the cell cycle
This is because cancer is a defect that causes the cell to repeatedly divide and undergo mitosis. If genes involved in the cell cycle mutate, the genes that limit and regulate the cell cycle may be changed or inactive, leading cancer cells.
<span>The answer is gravity. According to general relativity by Einstein,
the bending of space-time is dependent on the nature of the matter of the
object, or energy, momentum, and radiation. The heavier the object, the bigger
the curvature of space-time it causes, that is felt as gravity. Heavier objects with a bigger
gravity pull, pull other objects (with lesser gravity pull) more towards them
than vice versa. </span>
Answer:
D) antibody immunity uses B and T-helper cells; cellular immunity uses different types of T cells
Answer:
D. Scintillation counter
Explanation:
DNA is usually labelled with radioactive phosphorus, which is a β emitter, so you need a device that can detect β particles.
A scintillation counter detects β particles because they emit a flash of light when they hit a phosphor. The device converts the flashes into electrical signals, amplifies then about a million times, and then counts them.
A, B, and C are wrong. They are all common laboratory equipment, but they can't detect radioactivity of any sort.
Answer:
Evolution
Explanation:
Archaeologists have attemped to draw up an evolutionary history of humans using evidence of fossil skeletal fragments and cultural artifacts discovered with them. Hominidae family of man and pangidae family of anthropoid apes are thought to have evolved from proconsul or dryopithecus which lived about 20 milllion years ago. The hominidae gave rise to human species and pongidae gave rise to the present day anthropoid apes.
