Which of the following statements is true?
(a) most bacterial species can be cultured in the lab.
(b) macronutrients are present in sufficient quantities for growth as contaminants in water and glassware.
(c)all bacterial species require the same essential nutrients.
(d)bacterial species use a limited number of nutrient sources.
(e) all organisms require sulfur as a macronutrient.

All organisms require sulfur as a macro-nutrient. (Ans. E)

Explanation:

Sulfur is necessary for all living things. It is taken up in the form of sulfate from the soil and sea water by the plants, and algae.

Sulfur is known as the essential nutrient for plant growth. Sulfur playing various important role in plants. About 90% of the sulfur is absorbed by the plants for the purpose of amino acids synthesis, known as the building blocks of proteins. Sulfur is important for the enzyme which is helping in the formation of the chlorophyll molecule. Sulfur is essential for the synthesis of oil crops.

In human body sulfur playing some essential role such as amino acid production which is converting into proteins and producing enzymes. Sulfur is important for insulin production, insulin allow the cells to use glucose as energy. Sulfur is found in most important antioxidant known as glutathione, which helping in the inhibition of oxidation of the other molecules and preventing from cell damage. Collagen provide skin strength and structure, sulfur is important for collagen synthesis as well.

answer: a. a gene that causes a specific trait.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.