A type of trilobite is used as an index fossil these fossils were made about 540 million years ago a scientist finds a trilobite fossils in layer 5 apex

What do you think would happen if one specialized stopped working

Your teacher is describing a plant that bears seeds and flowers has five flower petals and has seeds that are enclosed by fruits what kind of plant is he describing

Which of the following is true regarding saturated fatty acids? A) They are the predominant fatty acid in corn oil. B) They have double bonds between carbon atoms of the fatty acids. C) They are the principal molecules in lard and butter.

All organisms must be able to obtain nutrients from their environment. Which of the following terms describes the process of one organism killing another organism in order to obtain nutrients? A. predation B. secondary trophism C. symbiosis D.

Which best describes the fossil record

What do a door and a venus flytrap leaf have in common

Where would be the best place to find an alpine glacier A) Antarctica B) Greenland C) the Himalayas D) the North Pole

The Sun is A. a very small star. B. a medium-sized star. C. the largest star in the universe. D. the same size as all the other stars.

6. The blood component that has the greatest affinity for oxygen is the a) Lymphocyte" (b) Leucocytes (c) Erythrocytes (d) Thrombocyte

According to the endosymbiosis theory scientist believe early eukaryotes form from prokaryotes why do scientist believe that prokaryotes existed earlier eukaryotes