BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 52, Problem 3A
Suppose that a burst of
a. A change or mutation relevant to the epidermis or skin
b. A switching of the internal organs so that reverse orientation (left/right) occurs along the midline of the body
c. The migration of the nervous system to form outside of the body
d. Failure of the reproductive system to develop
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Studies of the infant brain show signs of what scientists call synaptic pruning. What occurs during this process? a. The brain creates additional neural connections by removing parts of the surrounding bone. b. Unused synaptic connections and nerve cells are cleared out to make way for new cells. c. New cells work to “rewrite” old cells and ultimately change their functioning. d. New cells will not develop until the body makes sufficient physical space within the brain.
The development of a zygote into a baby involves pre-embryonic development for the first 2 weeks, followed by embryonic development for the next 6 weeks, and finally fetal development until the baby is born. When is the developing baby considered a fetus?
Select one:
a. When all major organ systems have formed
b. After the neural tube forms
c. Once gastrulation is complete
d. When most major organ systems have formed; the neural system forms during the fetal stage
Which of the following embryonic cell movements involves the desperation of cells from a continuous sheet of cells?
A. Epiboly
B. Involution
C. Ingression
D. Convergent extension
Chapter 52 Solutions
BIOLOGY
Ch. 52.1 - Describe the events involved in fertilization.Ch. 52.1 - Prob. 2LOCh. 52.2 - Prob. 1LOCh. 52.2 - Prob. 2LOCh. 52.2 - Prob. 3LOCh. 52.3 - Prob. 1LOCh. 52.3 - Compare gastrulation in different animals.Ch. 52.3 - Name the extraembryonic membranes in amniotes.Ch. 52.4 - Prob. 1LOCh. 52.4 - Prob. 2LO
Ch. 52.4 - Prob. 3LOCh. 52.5 - Prob. 1LOCh. 52.5 - Explain the function of the organizer.Ch. 52.5 - Distinguish between primary and secondary...Ch. 52.6 - Describe the major developmental events in the...Ch. 52.6 - Explain the role of the placenta.Ch. 52.6 - Prob. 3LOCh. 52 - Data analysis Two different genes have mutant...Ch. 52 - Prob. 1IQCh. 52 - Prob. 1UCh. 52 - Which of the following plays the greatest role in...Ch. 52 - Gastrulation is a critical event during...Ch. 52 - Gastrulation in a mammal would be most similar to...Ch. 52 - Prob. 5UCh. 52 - Of the following processes, which occurs last? a....Ch. 52 - Which of the following would qualify as a...Ch. 52 - Prob. 1ACh. 52 - In the Spemann experiment, when the dorsal lip is...Ch. 52 - Suppose that a burst of electromagnetic radiation...Ch. 52 - Prob. 4ACh. 52 - Drug or alcohol exposure during which of the...Ch. 52 - Axis formation in amniotic embryos could be...Ch. 52 - Prob. 1SCh. 52 - You look up from your studying to see your dog,...Ch. 52 - Why doesnt a woman menstruate while she is...Ch. 52 - Spemann and Mangold were able to demonstrate that...
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- A female rat gives birth 28 days after breeding. The young ones grow into adults in 5 to 7 weeks. Which characteristics of life are described here? a. Cell organization and Homeostasis b. Growth and reproduction c. Development and response to environment d. Homeostasis and use of energy e. Physical and chemical change.arrow_forwardWhich of these is the first step for positron-emission tomography (PET)? A. Inject a radioactive chemical into the blood. B. Insert an electrode into the brain. C. Subject the brain to a strong magnetic field. D. Attach light-sensitive proteins to a virus.arrow_forwardWhich of the following statements clearly describes the difference between embryonic and fetal development? Select one: a. Embryonic development begins during the tenth week of gestation, a time of morphogenesis. b. Organs continue to grow and develop during embryonic development. c. Fetal development begins during the ninth month of gestation, a time of rapid growth. d. Organs continue to grow and develop during fetal development.arrow_forward
- Which of the following extra-embryonic membranes becomes the embryonic portion of the structure involved in waste and nutrient exchange between the embryo and the mother? Select one: A. Amnion B. York sac C. Chorion D. Trophoblastarrow_forwardIn some cases, positive feedback systems carry the mechanism for their own destruction without being fatal to the organism, but to a part of the organism. Which one of the following is example to this? Select one: a. Ovulation b. Myotatic spinal reflex c. Bronchiole constriction d. Regenerating ulcerationsarrow_forwardAt which of the following stages of development is a frog embryo composed of the most cells? Group of answer choices A. blastula B. neural tube stage C. gastrula D. zygote (fertilized egg)arrow_forward
- You are studying reproduction in starfish (also known as sea stars). You are able to successfully extract sperm and eggs from individuals in the lab and artificially fertilize the eggs. What is the first thing you expect to see in the zygote/embryo after successful fertilization? Group of answer choices a. development of organs b. development of a barrier against sperm entry c. rapid cell division WITHOUT growth d. rapid cell division with growtharrow_forwardChoose the best of the following Which process is responsible for the shape and form of the body? a. cleavage c. inductionb. growth d. morphogenesisarrow_forwardEstradiol is found in high levels in the pregnant rat. This estradiol is prevented from affecting the development of the fetus because: a. it is chemically converted to testosterone, which does not affect the fetus b. it is bound by alpha-fetoprotein c. the blood-brain barrier keeps estrogens like estradiol out of the brain d. the fetus does not possess the estrogen receptors needed to respond to the estradiolarrow_forward
- Which among the types of neurons carry impulses from the brain or spinal cord to the muscles? A. associative neurons C. pyramidal neurons B. motor neurons D. sensory neurons 3. When did positive feedback stop during childbirth? A. when the baby was born C. when oxytocin was released B. when amnion bursted D. when the placenta came out 4. What is the treatment for cerebral palsy? A. through chemotherapy C. treated with antibiotics B. through surgery D. treated with anticonvulsant drugs 5. Which of the following components of negative feedback is responsible for the response to changes? A. control center B. effector C. receptor D. stimulus 6. Which of the following internal control systems is responsible in gathering information about the conditions inside and outside of the body? A. communicating system C. sensor B. control center D. thalamus 7. When there is an increase in the sugar level, negative feedback occurs in our body. What organ is responsible for…arrow_forwardFrom what you know about embryonic development, do you think that a cell from the inner cell mass or one from the ectoderm has more developmental potential?arrow_forwardWhich of these processes is MOST directly involved in the resorption of a tadpole’s tail during development? A. apoptosis B. mitosis C. phagocytosis D. protein synthesisarrow_forward
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