Which statement best describes the panspermia hypothesis?

a. Life on Earth could have started abiotically.
b. Life on Earth could have started biotically.
c. Different forms of life were present in outer space but these may not have seeded early Earth.
d. Very simple forms of li


Ans: d. Very simple forms of li

Biology & Microbiology

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Adaptive radiation could resulted in which of the following?

A. Many ancestral species evolve into one of descendant species that differ greatly in habitat, form and behavior from the ancestral species. B. The evolution of the horse which depended on the change in food supply. C. The abundant species of Hawaiian honeycreepers. D. The 1,000 species of Drosophila found dispersed throughout the Hawaiian Islands. E. The abundant species of Hawaiian honeycreepers and Drosophila found on the Hawaiian Islands.

Biology & Microbiology

Answer the following statements true (T) or false (F)

1. Each citric acid cycle will produce two carbon dioxide molecules and one ATP molecule. 2. The electron transport chain is the first component of aerobic respiration. 3. Clostridium botulinum, the bacteria that causes botulism, is an obligate anaerobe, meaning it requires oxygen to survive. 4. Triglycerides store about the same amount of energy as carbohydrates. 5. Autotrophic eukaryotes, such as plants, convert sunlight into carbohydrates in organelles called chlorophylls.

Biology & Microbiology

Probably the greatest advantage for the original multicellular organisms was their ability to

A) photosynthesize. B) increase their food intake. C) increase their metabolism. D) use more oxygen. E) avoid predation.

Biology & Microbiology

________ can be detected through a blood test that detects a specific antigen called PSA

Fill in the blank(s) with correct word

Biology & Microbiology