Which vein in the body carries oxygenated blood?

A) pulmonary vein
B) inferior vena cava
C) Veins never carry oxygenated blood.
D) superior vena cava
E) coronary vein


Answer: A

Biology & Microbiology

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Using the figure above and the accompanying paragraph, and knowing that the PKG encoded by the foraging gene has recently been associated with the maturation of out-of-nest behavior in honeybees, what would be a logical explanation for this relationship?

As animals mature, they _____. A) require more food; therefore, PKG levels must increase. B) are more likely to forage; therefore, PKG levels must increase. C) respond to pheromones from the queen, which increases PKG levels. D) are able to fly, an activity that is connected to the increase in PKG levels.

Biology & Microbiology

The dead brown spots on these leaves

are sites where a pathogen invaded and triggered the defensive destruction of surrounding cells. This is an example of which type of defense?

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Deletion of an entire autosome ____

a. causes XYY syndrome b. causes Down syndrome c. causes no physical symptoms d. is lethal e. is called polyploidy

Biology & Microbiology

What is one advantage that an RNAi screen may have over a screen for gene knockouts?

What will be an ideal response?

Biology & Microbiology