Metabolic pathways ___.

1. control the flow of energy

2. control enzyme activity

3. can be linear or branched out

4. all the above

In female gamete development in humans and other vertebrates, the net result of meiosis is the production of one large egg and three small cells with very little cytoplasm. these three small cells: select one:

Compare and contrast a pair of magnets and a pair of water molecules?

How are the concepts of spontaneous generation, biogenesis, and the cell theory related?

The chemical make up on a rock A. texture B. erosion C. deposition

Your family is driving across the country to the Grand Canyon. What type of pollution is your car producing? A. Agriculture source B. Mobile source C. Stationary source D. Natural source

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.

What are reasons scientists use models? To study objects far away To study objects too large To study objects too small. To study objects easily found in a lab. To study events that take place over long periods of time.

1. true false Carbon atoms form the building blocks of most living things.

Inhibiting enzymes involved in cell wall synthesis leads to which of the following? A) cell death by osmotic lysisB) a reduction in protein synthesisC) the incomplete synthesis of the bacterial cell wallD) a reduction in the amount of usable energy

In the 20th century where did the most ecologically destructive oil spill in the US