How do scientists use DNA to study the origins of humans? a. Cloning b. Examining the number of chromosomes in populations c. Looking at the genetic markers in different populations

Which of these is a characteristic of a monocot plant? a. two seeds leaves b. leaf vein in a net pattern c. flower parts grouped in threes d. vascular bundles arranged in ring in the stem

Which of the following best compares viral reproduction to reproduction in other organisms? A. Viruses do not contain genes that are replicated and passed on. B. Viruses must commandeer the mechanisms of a host cell in order to reproduce. C.

Why does oil take so long to form in nature?

Observations of two different cell types indicate a couple of differences in their mitochondria. Cell type 1 has 2-3 times the mitochondria of Cell Type 2.

Which of the following items should not be added to a compost bin

Homeostasis is classified under which of the following A. Cell respiration B. Transcription C. Cell regulation D. Photosynthesis

A ball, with a mass of 10 kg, is dropped from the top of a building, from a height of 20 meters. Explain what will happen to the potential energy if the 10 kg mass is replaced with a mass of 40 kg and the height of the drop remains constant.

Which of the following is a disadvantage of animal endoskeletons? a. Endoskeletons allow organisms to grow large in size. b. Endoskeletons don't need to be molted as an organism grows. c.

A species of cactus is adapted to a desert climate. Over a period of many years, the climate becomes wetter. How will the cactus population most likely be affected by this change? A It will grow as more water resources become available.

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