Answer:
Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature. Sunlight is one the most important abiotic factors for marine ecosystems.
Answer:
Dendrochronology-the study of climate and atmospheric conditions
Explanation:
the answer is A. covalent bonds
<h3><u>Answer;</u></h3>
Nucleotides are the sub units of DNA, their function is to form the genetic code.
<h3><u>Explanation</u>;</h3>
- Nucleotides are the subunits of DNA. The four nucleotides are adenine, cytosine, guanine and thymine.
- <em><u>Each of the four bases has three components, a phosphate group, a deoxyribose sugar and a nitrogen-containing base.The four different nucleotides in DNA differ only in the nitrogenous base. The nucleotides bind together in specific pairs , adenine with thymine and cytosine with guanine.</u></em>
- The function of nucleotides is to build DNA. The way they bind leads to the characteristic double helical structure of DNA. The order of the different nucleotides forms the genetic code.
<span>d. Tropical dry forest
</span>A biome is composed of various diverging ecosystems that relates with the community. Biomes can either be deserts, grassland, savanna, tropical rain forest, taiga, boreal and etc. <span>An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. </span>