Which of the following has caused 100,00 year cycles of ice ages in the past?

A. An increase in sun spots

B. Several major volcanic eruptions

C. changes in earths orbit and the tilt of its axis

D. continental drift

What do the letters on the outside of the Punnett square stand for

All organisms that can synthesize thier own food by means of photosynthesis are heterotopic

Bacteria are the simplest single cells that A. Include all cell parts and organelles B. Carry out all basic life activities C. Are highly organized D. All have the function

Climatology is a subspecialty of A. marine biology. B. oceanography. C. meteorology. D. environmental science.

Why does salt thrown on a frog's body will kill it?

What region of the united states is beef and hog production prevalent?

What serine protease proteolytically degrades both fibrin in clots and native fibrinogen in the circulation into a series of well-characterized end-products collectively known as fibrin/fibrinogen degradation products?

Write a sentence with scientific law in it

Through what process do the cells of the blastocyst develop into all of the cells of a growing fetus's organ systems? A. Implantation B. Fertilization C. Differentiation D. Meiosis

What percentage of chromosomes normally found in the body cell of an organism do gamete cells contain after meiosis A - 24% B - 50% C - 60% D - 100%