Witch element is capble of forming long chains by forming single and double or triple bonds with its self

What is the relationship between Earth's revolution around the sun and seasons?

The species that are most vulnerable to extinction are those, which are a. endemic and limited to a single population. b. endemic and widespread in several large regions. c. genetically diverse and found in many regions.

Which part of the heart takes blood from the veins and pumps it into a ventricle? A. ventricles B. valves C. arteries D. atria

Beginning with carbon fixation, arrange the steps of the Calvin cycle in the correct order

Tim & Ann have just taken their last child off to college. What period in the family life cycle are they now experiencing? a. Launching adolescents b. Role reversal c. Kin-keeper d. Empty nest

Which of the following is an example of exploitation? A. ants eating trash B. humans that create a beehive C. flowers blooming D. rabbits that feed on a homeowner's garden

How much energy is lost when one organism consumes another organism? A. 10% B. 90% C. 80% D. 5%

Question 3 Volcanic islands and island chains, like the Hawaiian Islands, were created by (need an answer here) spots, which may or may not occur on a plate's boundary.

What way do Sugar Ants obtain and use energy? A. Autotrophic B. Heterotrophic C. Both D. Or Absorption

What chemical speeds up the process of decomposition when dead organisms are exposed to it?