Which of these types of animals would you expect to find in the deepest rock layers?
A) fish B) parrots C) whales D) frogs
Answer: A
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Which structure produces an alkaline fluid that helps maintain sperm motility and counteracts the acidity of the female reproductive tract?
A. epididymis B. seminal vesicle C. testis D. vas deferens E. prostate gland
Which feature is common in a virus?
A) cell wall B) nucleus C) capsid D) plasmid
Endosymbiosis explains the origin of the ________ of eukaryotes
A) chloroplasts and mitochondria B) endomembrane system C) nuclear envelope D) membrane-bound organelles
A diet high in animal products and hydrogenated vegetable margarine may increase the risk for heart disease. This is because
A) most animal fats are unsaturated and most hydrogenated vegetable margarines contain high levels of steroids. B) most hydrogenated vegetable margarines are hydrogenated oils and most animal products contain high levels of phospholipids. C) most animal fats are used for energy storage and most hydrogenated vegetable margarines contain high levels of unsaturated fats. D) most animal fats are saturated and many hydrogenated vegetable margarines contain high levels of trans fats.