Which of the following does NOT occur in the
first three months of development?
a. formation of a heart
b. disappearance of the tail
c. formation of internal organs
d. detection of movement of the fetus
e. segmentation and development of somites
D
You might also like to view...
Answer the following statements true (T) or false (F)
1. Glycolysis involves 10 enzyme-catalyzed steps, that can be grouped into three phases: energy investment phase, cleavage phase, and the energy liberation phase. 2. The electron transport chain consists of a series of redox reactions in which electrons are transferred to oxygen as the final electron acceptor. 3. Oxygen is an excellent final electron acceptor because of its low electronegativity. 4. NADH and FADH2 donate their electrons to protein complex I. 5. Ubiquinone is also known as coenzyme Q.
Respond to statements 61–65 in reference to the five kinds of
behavior listed below. a. imprinting b. sexual selection c. learned behavior d. defense behavior e. altruism M 61. The extreme variation in plumage observed among the males of various species of ducks is thought to be due to __________. E 62. A garter snake learns to avoid dangerous or unpalatable prey. This is an example of __________. E 63. If the young of precocial birds (e.g., chickens or ducks) are continually shown a large moving object during the first few days of their lives, they will follow that object. This is an example of __________. M 64. The adult male who jumps overboard to save a drowning niece is exhibiting __________. M 65. A prairie dog makes a particular bark when it sights an eagle. This is an example of __________.
Which genus is resident flora of the mouth, large intestine, and, from puberty to menopause, the vagina?
A. Escherichia B. Mycobacterium C. Haemophilus D. Streptococcus E. Lactobacillus
Why are embryonic stem cells different from adult stem cells?
a. they can become any kind of cell (totipotent) b. they are haploid c. they have different genes d. they are committed