What is the origin of pioneer species in primary succession?

A) they immigrate from other areas

B) they are survivors of the ecological disturbance

C) they evolve from other organisms already present

D) they are present in the remains of dead organisms

Clouds are formed when A. Sunlight causes water droplets to evaporate B. Liquid water condenses on grass and windows C. Raindrops freeze into tiny pellets and fall to earth D. Water vapor in the air condenses to form liquid water or ice

During a heavy thunderstorm, where would you be most likely to see surface runoff? A. on a mulched garden B. in a grassy plain C. in a dense forest D. on a paved hill

3. Describe the directionality of RNA polymerase action. Include the terms: DNA template strand, DNA coding strand, DNA noncoding strand, mRNA, codons, 5'-3' and 3'-5'.

Which of these is not one of the big six events of human evolution?

A nurse is teaching a patient about insulin. which information should the nurse include? insulin is primarily regulated by:

A train accelerates at a rate of 2.5 km/hr/sec. During the acceleration period, its velocity changes by 55 km/hr. Choose the exact time of the train's acceleration. A. 1,200 s B. 22 hr C. 22 s D. 0.045 s

Why did Mendel use cross-pollination in his experiments? A) to speed up self-pollination b) to control which plants pollinated other plants c) to make sure dominant factors were always produced

How is heat held in the atmosphere

Suggest a reason for the rather large energy excess available in the insertion of a deoxyribonucleotide into a growing DNA molecule. (About three times as much energy as is necessary is available in the reaction dNTP + DNAn → DNAn+1 + pyrophosphate.

The health care provider is performing a spinal tap on a client with suspected infection. the provider would perform the procedure at: