The formation of carbohydrate (CO2 fixation) in the dark reaction of photosynthesis, takes place in the
A. nucleus.
B. stroma.
C. thylakoid membrane.
D. cytoplasm.
Answer: B
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Why is the evolutionary origin of all eukaryotes no longer considered to be a simple evolution from a single Archaea species?
a. Archaea contain insufficient genetic material to explain eukaryotic evolution. b. Fossil records provide evidence that Archaea evolved after eukaryotes. c. Some eukaryotic genes share more similarity with Bacteria than Archaea. d. Some eukaryotes contain mitochondria, which are invariably fatal to Archaea.
The embryonic shoot and root are separated by a tiny section of embryonic stem, called the ____
a. plumule b. hypocotyl c. radicle d. cotyledon e. coleoptile
When carbon dioxide is absorbed into water, the solution becomes more
a. acidic. b. basic. c. warm. d. red.
The hydrogen bonds of water play an important role in the ability of animals to regulate their body temperature
Explain how this occurs. What will be an ideal response?