Which fetal blood vessels carry oxygen-poor blood to the placenta?
Answer: umbilical arteries
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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?
Which of the following kind of animal is NOT an amphibian?
A. Caudata B. anuran C. salamander D. Gymnopiona E. amniote
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
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