Which of the following does not contribute to shifts in our normal microbiota?
A) our general environment
B) hormonal changes
C) diet
D) age
E) proper hand-washing technique
Answer: E
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Answer the following statements true (T) or false (F)
1. The first bilateral animal emerged during the Ordovician Period. Fossils of this organism were discovered in South Africa. 2..The eukaryotic genome is comprised entirely of genes derived from Archean ancestors. 3. Although not well understood, the Cambrian Explosion most likely occurred due to changes in sea level and continental drift. 4. According to Thomas Malthus, food supplies tend to increase arithmetically while populations tend to increase exponentially, which means that populations will outgrow their food supply. 5. Selective breeding results from programs designed to modify traits in domesticated species.
In your study group, your classmates are discussing the relationship between energy expenditure and body size in different animals. There is much confusion as members of the group try to figure this out. How can you explain this to them?
A. A horse has a larger mass-specific metabolic rate than a hummingbird. B. An alligator has a larger mass-specific metabolic rate than a small lizard. C. A hummingbird has a larger mass-specific metabolic rate than a horse. D. A small lizard has a larger mass-specific metabolic rate than an alligator. E. A hummingbird has a larger mass-specific metabolic rate than a horse, and a small lizard has a larger mass-specific metabolic rate than an alligator.
A cohort is ____
a. a group of individuals of the same species born during the same time interval b. any member of the same species c. a group of individuals with the same parents d. a group of individuals of the same sex e. any group of closely related individuals
Fungi are classified into phyla based on which characteristic?
A. organelles B. composition of cell wall C. photosynthesis D. reproductive structures E. multicellular vs. unicellular