Canada thistle is a dicot that spreads via growth from lateral roots. You want to use a root miner insect for weed control
What would you need to observe in the underground growth to verify that this weed spreads via lateral roots and not by underground stems? A) an epidermis at the periphery
B) vascular bundles in a ring around the outside of a cross section
C) a vascular bundle in the center surrounded by parenchyma tissue
D) meristematic tissue at the tips of the branches
C
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The original differentiation of prokaryotes and eukaryotes was based on structures found in prokaryotes that are lacking in eukaryotes.
Answer the following statement true (T) or false (F)
In a plant, the reactions that produce molecular oxygen (O2 ) take place in _____
A) the light reactions alone B) the Calvin cycle alone C) the light reactions and the Calvin cycle D) neither the light reactions nor the Calvin cycle
It is difficult to estimate current rates of extinction, but we know that extinction rates have risen dramatically in recent years because
A) the fossil record is unreliable. B) current rates of extinction are much higher than that of background rates. C) new species are evolving as fast as species are becoming extinct. D) background extinction rates have increased. E) most species in danger of extinction are microscopic.
DNA is a nucleic acid that consists of thousands of smaller, repeating units called nucleotides. What function do nucleic acids serve besides storing genetic information?