The answer is b. <span>A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
</span>In the photosynthesis, plants take carbon dioxide and water
and convert it into glucose and oxygen using the energy of sunlight. A decrease of plant life in the biosphere will increase a level of carbon dioxide in the atmosphere. Fewer plants mean fewer photosynthesis processes, and, thus, decreased levels of oxygen in the atmosphere.
Answer : B ) Visible and infrared light
I think that the tectonic plates would shift towards each other. This creates what is known as a convergent boundary. If the plates moved away, then this would be known as a divergent boundary. If it is wrong, I am terribly sorry. I did this question on a quiz before, and I think I got it right. It was in 8th grade though, so... two years ago.
A pair of genes that control a trait is referred to as an allele.
The right answers are : b. nitrogenous bases c. phosphates d. sugars.
Deoxyribonucleic acid (DNA) is the genetic information of most living organisms (on the other hand, some viruses, retroviruses, use ribonucleic acid (RNA) as genetic information).
- DNA is a polymer, made of units called nucleotides (or mononucleotides).
- The nucleotide consists of a phosphate + a sugar + a nitrogenous base. In DNA, the nucleotide is a deoxyribonucleotide (in RNA, the nucleotide is a ribonucleotide).
