Answer:
<u>A chemical bond between the phosphate group of one nucleotide and the sugar of a neighboring nucleotide holds the backbone together. Chemical bonds (hydrogen bonds) between the bases that are across from one another hold the two strands of the double helix together.</u>
Explanation:
Make/produce and secrete hormones
Answer:
The main natural carbon sinks are plants, the ocean and soil. Plants grab carbon dioxide from the atmosphere to use in photosynthesis; some of this carbon is transferred to soil as plants die and decompose. The oceans are a major carbon storage system for carbon dioxide.
Explanation:
<span>E. Coli are found in the intestines of humans and aid in digestion.
Streptomyces is used in making antibiotics.
<span>Rhizobium are helpful bacteria found in the soil. They convert nitrogen in the soil.</span></span>
Answer:
D ecosystem
Explanation:
A ecosystem is liveing spiecies interacting with thier enviornment together as a system.
