Mitochondrial and chloroplast genomes typically Mitochondrial and chloroplast genomes typically encode some of the proteins needed for aerobic respiration and photosynthesis, respectively, as well as ribosomal and transfer RNA. encode for ribosomal and transfer RNAs. encode all of the proteins needed for aerobic respiration and photosynthesis, respectively. encode some of the proteins needed for aerobic respiration and photosynthesis, respectively. are composed of primarily noncoding DNA.

The correct answer is "encode some of the proteins needed for aerobic respiration and photosynthesis, respectively, as well as ribosomal and transfer RNA".

Explanation:

Most organisms have a mitochondrial or a chloroplast genome in addition to the main genomic sequence located in the cell nucleus. The genes that are located in these organelles' genome include the genes that are used directly in the mitochondrion or chloroplast , including: proteins needed for aerobic respiration and photosynthesis (for instance genes involved in oxidative phosphorylation), respectively, as well as ribosomal and transfer RNA, which serve to the translation of proteins.

Option A. The carbon cycle helps to regulate Earth's temperature.

Explanation:

Carbon is present in carbondioxide which is a greenhouse gas. Greenhouse gas is a type of gas which has the ability to absorb heat energy from the surrounding and increase the temperature of earth atmosphere. If greenhouse gas increases in the concentration, it increases the temperature of earth and causes global warming. This carbon is regulated in the atmosphere through a cycle called carbon cycle. Carbon comes to the earth through rainfall and photosynthesis and goes back to the atmosphere through respiration.