Which Era are we currently living in?
a. Pleistocene
b. Mesozoic
c. Cenozoic
d. Cambrian
e. Paleozoic
c
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Ocean pollution includes all except
a. toxins. b. heavy metals. c. dissolved oxygen. d. oil. e. PCBs.
Answer the following statements true (T) or false (F)
1. Abnormalities in the number of chromosomes, known as nondisjunction, are more common in younger parents. 2. Johann Gregor Mendel posited in his study on inheritance in plants that offspring exhibited an even blending of physical appearance and traits from parents. 3. This statement is false. Mendel posited in his study on inheritance in plants that offspring exhibited traits that are transmitted faithfully from parents to offspring in specific patterns. 4. This statement is false. The process of meiosis was not understood by the scientific community during Mendel’s lifetime. Mendel came to understand his laws of segregation and independent assortment through his meticulous breeding of pea plants with distinct observable traits. 5. An organism can have the genotype for an inherited genetic disease or condition, but never develop that condition.
What is a characteristic of archaebacteria?
a. Most are disease-causing. b. They live just about everywhere. c. They use sun to produce food and energy. d. They thrive in extreme environments.
Which of the following organisms is using sulfur as a source of energy?
A) Thiobacillus: H2S ? S0 B) Desulfovibrio: SO42- ? H2S C) Proteus: Amino acids ? H2S D) Redwood tree: SO42- ? Amino acids E) Photosynthetic bacteria: H2S ? S0