CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Chapter 46, Problem 11TYU
SCIENTIFIC INQUIRY You discover a new egg-laying worm speties. You dlssect four adults and find both oocytes and sperm in each. Cells outside the gonad contain five chromosome pairs. Lacking genetie variants, explain how you would determine whether the worms can self-feriilize.
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6)From the menu on the left on Virtual Urchin, click on "embryogenesis to hatching". This will display a video of sea urchin development. Photos of key stages taken with a scanning electron microscope (SEM) are shown next to the video. In addition to watching the video by clicking the play button, you can use the slider at the bottom to move through the stages step by step. Doing this will allow you watch how cell division increases the number of cells from the initial zygote. You'll notice that these divisions start off dividing cells evenly, but at a certain point, there are some smaller cells created. These smaller cells will play very important roles in the later development stages of the urchin, so their creation is a key milestone.
Which round of cell division is uneven? (hint: the SEM images will be helpful)
a)First
b)Second
c)Third
d)Fourth
e)Fifth
Notice that the size of the scale bar is 50 um. Keeping this image available, watch the șsea
4. Finding the size of a sea urchin embryo
Observe the image of the sea urchin embryo.
50μm
Photo credit.
urchin embryo cell division movie Calculate the diameter of a sea urchin embryo at he
one-, two-, and four-cell stages, Show your calculations below.
If that video doesn't play (it unfortunately requires Flash), you can try this similar but longer
one that involves a longer story of sea urchin romance preceding fertilization and zygote
divisions! It lacks a scale bar, but you can use the scale bar from the image above.
https://www.youtube.com/watch?v3D4445zftlCDQ
a. One cell-your calculations:
b. Two cells-your calculations:
c. Four cells-your calculations:
What are the phases displayed?
Chapter 46 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 46.1 - Compare and contrast the outcomes of asexual and...Ch. 46.1 - Parthenogenesis is the most common form of asexual...Ch. 46.1 - WHAT IF? If a hermaphrodite self-fertilizes, will...Ch. 46.1 - Prob. 4CCCh. 46.2 - How does internal fertilization facilitate life on...Ch. 46.2 - What mechanisms have evolved in animals with (a)...Ch. 46.2 - MAKE CONNECTIONS What are the shared and distinct...Ch. 46.3 - Why might frequent use of a hot tub make it harder...Ch. 46.3 - Prob. 2CCCh. 46.3 - WHAT IF? If each vas deferens in a male was...
Ch. 46.4 - How are the functions of FSH and LH in females and...Ch. 46.4 - How does an estrous cycle differ from a menstrual...Ch. 46.4 - WHAT IF? If a human female begins taking...Ch. 46.4 - Prob. 4CCCh. 46.5 - Prob. 1CCCh. 46.5 - In what ways are tubal ligation and vasectomy...Ch. 46.5 - Prob. 3CCCh. 46 - Would a pair of haploid offspring produced by...Ch. 46 - Identify which of the following, if any, are...Ch. 46 - How does the difference in size and cellular...Ch. 46 - Prob. 46.4CRCh. 46 - Prob. 46.5CRCh. 46 - Prob. 1TYUCh. 46 - In male mammals, excretory and reproductive...Ch. 46 - Prob. 3TYUCh. 46 - Prob. 4TYUCh. 46 - Prob. 5TYUCh. 46 - Prob. 6TYUCh. 46 - Prob. 7TYUCh. 46 - Prob. 8TYUCh. 46 - DRAW IT In human spermatogenesis, mitosis of a...Ch. 46 - Prob. 10TYUCh. 46 - SCIENTIFIC INQUIRY You discover a new egg-laying...Ch. 46 - WRITE ABOUT A THEME: ENERGY AND MATTER In a short...Ch. 46 - SYNTHESIZE YOUR KNOWLEDGE A female Komodo dragon...
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- Meiosis ________. a. occurs only in germ cells of animals b. supports growth and tissue repair in multicelled species c. gives rise to genetic diversity among offspring d. is part of the life cycle of all cells.arrow_forwardFertilization _____. a. unites the nuclei of a sperm and egg cell b. forms a zygote that has chromosomes of both parents c. usually occurs in an oviduct d. all of the above e. a and b but not carrow_forwardIn questions 13 and 14, decide whether each is an example of sexual or asexual reproduction, and state why. 13. A diploid queen honeybee produces haploid eggs by meiosis. Some of these eggs are never fertilized and develop into haploid male honeybees (drones).arrow_forward
- Match each hypothesis to its theory. Preformationism Genetic information is inherited from one parent or the other, not both. Pangenesis concept Reproductive cells have complete genetic codes for their species. Germ-plasm theory Cells in different tissues have unique genetic codes that are transferred to the gonads to produce gametes.arrow_forwardOrder the events leading to the sperm's nucleus fusing with the egg's nucleus. Question 1 options: sperm's nucleus is released into the egg's cytoplasm sperm burrows through the orona radiata sperm's nucleus and egg's nucleus fuse sperm's cell memrbane fuses with egg's cell membrane sperm's acrosome enzymes burrows through the zona pellucida the zona pellucida changes so that any new sperm's acrosome cannot burrow through the zona pellucidaarrow_forwardGive the Haploid Number of Chromosomes for a Varietyof Organisms (see below) Common Name Scientific Name Zebrafish Danio rerioarrow_forward
- The process by which an animal's embryonic cells specialize into specific cell types is called ___. specialization cloning regeneration differentiation senescencearrow_forwardWhich process:arrow_forwardArchegonium is an example of female gametangium in plants, which produce motile egg cell. * O False O True The enzyme which catalyzes complementary DNA from RNA templatarrow_forward
- 1. Examine the image below. M G2 G1 Go as mee Match the phase from the cell cycle in the column on the left with the process that occurs during the phase on the right. (2 points) [Use ALL choices] G1 phase DNA synthesis S phase new growth cell division G2 phase final growth and preparation for cell division M phase 2. Choose a word from the drop-down menu for each blank to complete the sentences below. During mitosis, one cell divides into two daughter cells with [CHOICE 1] genetic material. In comparison, asexual reproduction allows a single, simple organism to reproduce, yielding an offspring that is genetically [CHOICE 2] when compared to the parent. Choice 2 Choice 1 similar similar different different identical identicalarrow_forwardIs both chromosomes and vacuole are inside the nucleus of an animal cell truearrow_forwardSelect all the statements that are true for mitosis ends with 2 diploid cells has 2 rounds, each followed by cytokinesis starts with 1 diploid cell O how organisms make body (somatic) cells O how organisms make sex cells (gametes) ends with 4 haploid cells starts with 2 diploid cells ends with identical cellsarrow_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