The energy flow through the trophic levels of an ecosystem is represented as a pyramid because __________.
Fill in the blank(s) with the appropriate word(s).
Answer: only about 10% of the energy at each trophic level is available at the next level
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Answer the following statements true (T) or false (F)
1) Plasmids are created exclusively in research laboratories and do not occur naturally. 2) Bacteria that live in extreme environments, such as thermal vents on the ocean floor, have evolved genes that allow them to use the resources within that environment. 3) All the genes in a species' core genome are located on the bacterial chromosome, whereas the genes of the pangenome are carried on plasmids. 4) Mapping genes by conjugation can be performed by interrupted-mating experiments in which conjugation is physically disrupted at 1-minute intervals. 5) Scientists can identify the gene mutated in a bacterial auxotroph by transforming the cells with a genomic library in which fragments of the auxotroph's genome have been cloned into plasmids. 6) Multidrug resistance is not a major health concern because new antibiotics are easily and frequently identified.
Which of these is a direct source of energy for muscle contraction?
a. ATP. b. glycogen. c. glucose. d. fatty acids.
Describe the major taxonomic divisions of prokaryotic organisms
What will be an ideal response?
Which of the following is not involved in the regulation of the reproductive system?
A. hypothalamus B. testes/ovaries C. anterior pituitary D. adrenal gland E. nervous system