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The image below magnifies the cells in a stem cross-section. Where would you expect to find the youngest xylem cell? secondary growth labels.png

Bees must physically rub against structure _____ to collect pollen on its body. unlabeled flower parts.png

Which of the following statements is true about mosses and ferns?

Which of the following accurately describes double fertilization?

In which structure are microspores produced? unlabeled flower parts.png

Biologists think that endosymbiosis gave rise to mitochondria before plastids partly because…

After thoroughly investigating a newly discovered Archaean organism, scientists classified it as a halophile. Knowing this, you can deduce that this organism…

In the T-shirt experiments, what was the result when the female subjects had been taking oral contraceptives?

The following (simplified) Southern blot signals are from a male, a female, and a chick in the nest that the male and female attend. What do the results suggest?

Although there are exceptions, what can you generally assume about organisms that each year grow, and then shed, things like antlers, bright colors, and long tails?