A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases. The Human Genome Project estimated that humans have between 20,000 and 25,000 genes.
Answer:
In 1972, EPA issued a cancellation order for DDT based on its adverse environmental effects, such as those to wildlife, as well as its potential human health risks. ... As a result, today, DDT is classified as a probable human carcinogen by U.S. and international authorities.
Explanation:
Energy taken from ATP and NADPH is used to make energy-rich carbohydrates.<span>The light-independent reactions are reactions in which ATP<span> and NADPH is used</span> for the conversion of carbon dioxide into </span><span>energy-rich carbohydrates. So, the carbohydrates are produced and not used up as stated in choice B. Carbon dioxide is neither broken off of molecules with three carbons nor were used up in the light-dependent reactions, leaving choices a. and b. as wrong ones.
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Answer:
Xylem
Explanation:
Xylem is one of the vascular tissues or conducting tissues in plants. It primary function is to transport water, solutes, minerals, from the plants root and leaves to the rest of the plants. It also provide physical support to the plants and it consist of specialised vessels that contain tissues called tracheary elements.
