CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 27, Problem 11TYK
In an experiment, a researcher colored a bit of tissue on the outside of a frog gastrula with an orange fluorescent dye. The embryo developed normally. When the tadpole was placed under an ultraviolet light, which of the following glowed bright orange? (Explain your answer.)
a. the heart
b. the pancreas
c. the brain
d. the stomach
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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
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 growth
his type of animal has a male organ or a female organ. They are viviparous and nourish their young via a placenta in a simplex uterus. What type of animal is this? a. mammal b. lobster c. earthworm d. bird
Please answer asap and type your answer and do not copy from anywhere please
Chapter 27 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 27 - This graph plots the rise and fall of pituitary...Ch. 27 - Turns into the corpus luteum a. vas deferens b....Ch. 27 - a. vas deferens b. prostate gland c. endometrium...Ch. 27 - Prob. 4TYKCh. 27 - Prob. 5TYKCh. 27 - Site of human gestation a. vas deferens b....Ch. 27 - Prob. 7TYKCh. 27 - Secretes seminal fluid a. vas deferens b. prostate...Ch. 27 - Prob. 9TYKCh. 27 - After a sperm penetrates an egg, it is important...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- At 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_forwardWhich of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardWhich 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. Chorion b. Amnion c. Allantois d. Yolk Sacarrow_forward
- For pattern formation to occur, the cells in the developing embryo must a. “know” their position in the embryo. b. be determined during the earliest divisions. c. differentiate as they are “born.” d. must all be reprogrammed after each cell division.arrow_forwardObservations of the developing chick embryo reveal that skeletal muscles develop from the transplanted somites even though motor neurons innervating those muscles arise from chick neural crest cells. Based on these observations, what is MOST likely true? A. Neural crest cells differentiate into somites. B. Neural crest cells fuse with developing somite cells. C. Neural crest cells develop from migrating somite cells. D. Neural crest cells send projections into developing somites.arrow_forwardDuring morphogenesis, gastrulation does which of the following?A. Gastrulation produces the ectoderm through formation of a blastocyst.B. Gastrulation produces the mesoderm to form the lining of the digestive tract.C. Gastrulation provides the mechanisms whereby cells can form the neural tube.D. Gastrulation produces the endoderm through invagination of the blastula.arrow_forward
- Which 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_forwardWhich of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous systemarrow_forwardYou 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 second thing you expect to see (from this list) in the zygote/embryo after successful fertilization? Group of answer choices A. development of a barrier against sperm entry B. rapid cell division without growth C. rapid growth and cell division D. development of organsarrow_forward
- What is one of the ethical issues related to using embryonic stem cells? O A. Embryonic cells are donated. B. Embryonic cells need to be revived from dead tissue. O C. Embryonic cells are harvested from young embryos. O D. Embryonic cells are unfertilized and become fertilized through in vitro fertilization.arrow_forwardWhy is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell? a. As cells develop, signaling pathways can cause some genes to be turned off during development. b. Adult cells have different DNA content than do embryonic stem cells. c. Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells. d. It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.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_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY