The human blastocyst consists of two populations of cells with different functions. Select the correct match between population and its function
A) inner cell mass (ICM); forms the embryo and three of the four extraembryonic membranes
B) trophoblast; becomes fetal amnion
C) inner cell mass (ICM); becomes fetal chorion
D) trophoblast; becomes yolk sac
Answer: A
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Which of the following does mesenchyme give rise to?
A. Nervous tissue B. Muscle, bone, and blood C. The digestive organs and endocrine glands D. The reproductive and urinary systems E. The integumentary system and exocrine glands
Describe four ways in which vertebrate gills and lungs are similar
What will be an ideal response?
Most inspired particles such as dust fail to reach the lungs because of the ________
A) action of the epiglottis B) ciliated mucous lining in the nose C) porous structure of turbinate bones D) abundant blood supply to nasal mucosa
Two or more atoms of the same element that are chemically combined are known as:
A) molecules. B) ions. C) compounds. D) suspensions.