Which reason does not explain the presence of bicarbonate in seawater as being important?
a. Bicarbonate makes seawater slightly alkaline
b. Bicarbonate is able to release hydrogen ions in the water.
c. Bicarbonate is able to maintain a stable environment for marine organisms.
d. Bicarbonate is able to maintain pH levels at a relatively constant value.
b
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Answer the following statements true (T) or false (F)
1. Most microbes that are extremophiles are Archaea. 2. Archaea are prokaryotes and Bacteria are eukaryotes. 3. A pathogen is a parasitic microbe. 4. Feeding antibiotics to livestock promotes human health. 5. Mitochondria originated from Proteobacteria.
Octopuses and squid have a closed circulatory system with _______ heart(s).
a. one b. two c. three d. eight
Fleas feed on the blood of dogs, cats, and people. What is this ecological relationship called?
A) Competition B) Predation C) Parasitism D) Mutualism E) Resource partitioning
A zygote with animal and vegetal poles demonstrates what characteristic of some animal zygotes?
What will be an ideal response?