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A newly discovered organism was found to have multiple body cavities, all of which were surrounded by muscle tissue. This organism would best be described as…

Which of the following distinguishes deuterostomes from protostomes?

What type of sexual reproduction do sharks typically exhibit?

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…