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Question
Which of the following best describes the period during which the developing offspring is considered a fetus?
A) from fertilization to three weeks
B) from fertilization to eight weeks
C) the first trimester only
D) the third trimester only
E) from nine weeks until birth
Answer
This answer is hidden. It contains 1 characters.
Related questions
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Which of the following statements concerning sperm and fertilization is correct?
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A man has been experiencing reduced urine flow problems. After examination by his doctor, the diagnosis is an enlarged prostate gland. What is the connection between prostate enlargement and reduced urine flow?
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Sperm development takes about:
A) 1 month.
B) 28 days.
C) 6 months.
D) 2.5 months.
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The sequence of development of sperm is:
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B) primary spermatocyte, spermatogonia, sperm.
C) immature sperm, mature sperm, secondary sperm, spermatocyte.
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The vas deferens ducts empty sperm into the:
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Which structure would be best described as helping to prepare the female tract for pregnancy and maintain it during the early phases of pregnancy?
A) vagina
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On average, about how often does ovulation occur?
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B) every 28 days
C) every 14 days
D) every day
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Through what structure does an oocyte travel on its way to the uterus?
A) uterine tube
B) cervix
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If you could stop diffusion of substances in fruit fly zygotes, could you stop normal development? Why or why not?
Q:
Programmed cell death is also known as ________.
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You are a substitute teacher in a high school biology lab class on the day the students are dissecting frogs. A particularly bright student happens to notice that the left adrenal gland is malformed in her frog. She asks if a problem in embryonic development could have caused that. Although there may be more than one reason, what might you propose as an explanation based on embryonic development?
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Match the following. Answers may be used more than once.A) cleavageB) organogenesisC) gastrulationArchenteron develops
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Cells become more and more specialized as development progresses.
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Cleavage and gastrulation take place in animals such as humans and birds but not in frogs.
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The blastula is the stage of embryonic development in which cells migrate.
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B) sonic chicken
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Which of the following is a process by which an initial set of genes turns on a second set of regulatory genes, which eventually turns on a third set of genes?
A) developmental chain reaction
B) gastrulation
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D) the genetic cascade
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What is the effect of higher concentration of bicoid protein in part of a fruit fly embryo?
A) It will develop into the posterior end of the organism.
B) It will develop into the heart of the organism.
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Of the choices listed, the first event that occurs during embryonic development is:
A) germ layer formation.
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Which characteristic is typical of the vegetal pole of an embryo?
A) The vegetal pole is composed of a single, large cell.
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C) The vegetal pole contains relatively less yolk.
D) The vegetal pole has a relatively greater proportion of yolk.
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D) fertilization.
E) induction.
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