Answer:
element of ecosystem
Explanation:
This are climate ,natural vegetation
Answer:
purine
Explanation:
Purines are nitrogenous base that have two carbon-nitrogen rings. The most naturally occurring purines are adenine and guanine which are found in DNA and RNA as nucleotide building blocks of these polymers. Purines are constituents other important biomolecules, such as ATP, GTP, cyclic AMP, NADH, and coenzyme A. Purine and pyrimidine ribonucleotides built up essential intermediates in the synthesis of the polynucleotides RNA and DNA.
Answer:
A) few B) 100% c) 100%
Explanation:
Muscle responds a stimulus which is capable of generating action potential. Muscle response is in a way of "ALL or NONE". Muscle response to greater stimulus by recruiting more muscle fibers.
A) At threshold there would be only a small proportion of muscle is contracting.
B) At maximal stimulus the maximum number (100%) of recruitable fibers are contrating.
C) The number of recruitable fibers can't increase above maximal stimulus because already the maximum number of recruitable fibers are contracting.
The correct answer is D, oxygen.
Besides sugar, oxygen is a product given off during photosynthesis. :)
