Which fetal blood vessels carry oxygen-poor blood to the placenta?


Answer: umbilical arteries

Biology & Microbiology

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In an aquatic microbial community where a photoautotroph, chemoorganoheterotroph, and nitrogen fixing bacterium are present, predict an environmental perturbation that would cause only one to be outcompeted by the other two groups and explain how each group would respond


What will be an ideal response?

Biology & Microbiology

Which of the following kind of animal is NOT an amphibian?

A. Caudata B. anuran C. salamander D. Gymnopiona E. amniote

Biology & Microbiology

Which features are found in pioneer species? a. High dispersal rates b. Mature fast c. All of these choices

d. Produce many offspring e. Rapid growth rates

Biology & Microbiology

What agricultural practice encourages the rapid

spread of plant diseases?

a. irrigation practices b. use of herbicide sprays c. genetic modification of crops d. planting large areas with a single variety e. use of pesticides

Biology & Microbiology