The K-T boundary layer of rock was formed during a mass extinction
Ans: (asteroid that killed the dinosaurs) now called K-Pg boundary sequence
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What is the closest parallel in animal structural levels of complexity to the branches, buds, flowers, seeds, and fruits of flowering plants?
A. Subcellular, specialized organelles. B. Bone cells, muscle cells, skin cells, nerve cells. C. Muscle tissue, connective tissue, nervous tissue, epithelial tissue. D. Heart, lungs, stomach, kidney, reproductive organs. E. Digestive system, reproductive system, skeletal system.
In the figure above, how many plants would
have the genotype AaBb?
a. 1 b. 3 c. 5 d. 6 e. 9
When cells of the vascular cambium divide, they produce xylem toward the outside
____________________ Indicate whether the statement is true or false.
Answer the following questions true (T) or false (F)
1. The West Nile virus damages neurons by lysing them as they exit after replication or by triggering apoptosis. 2. The tetanospasmin toxin blocks normal inhibition while botulinum toxin blocks normal stimulation. 3. C. gattii is usually contracted from urban environments, C. neoformans is associated with natural settings.