Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 43, Problem 34CTQ
Why would paired external fertilization be preferable to group spawning?
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Why does the mode of fertilization correlate with thepresence or absence of male parental care?
Male parental care occurs in only 7% of fishes and amphibianspecies with internal fertilization but in 69% of species with externalfertilization. Propose an explanation for why this is so.
Why are sea urchins have external fertilization?
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How about internal fertilization?
Chapter 43 Solutions
Biology 2e
Ch. 43 - Figure 43.8 Which of the following statements...Ch. 43 - Figure 43.15 Which of the following statements...Ch. 43 - Figure 43.17 Which of the following statements...Ch. 43 - Which form of reproduction is thought to be best...Ch. 43 - Which form of reproduction can result from damage...Ch. 43 - Which form of reproduction is useful to an animal...Ch. 43 - Genetically unique individuals are produced...Ch. 43 - External fertilization occurs in which type of...Ch. 43 - Which term applies to egg development within the...Ch. 43 - Which term applies to egg development outside the...
Ch. 43 - Sperm are produced in the______ scrotum seminal...Ch. 43 - Most of the bulk of semen is made by the...Ch. 43 - Which of the following cells in spermatogenesis is...Ch. 43 - Which female organ has the same embryonic origin...Ch. 43 - Which female organ has an endometrial lining that...Ch. 43 - How many eggs are produced as a result of one...Ch. 43 - Which hormone causes Leydig cells to make...Ch. 43 - Which hormone causes FSH and LH to be released?...Ch. 43 - Which hormone signals ovulation? FSH LH inhibin...Ch. 43 - Which hormone causes the regrowth of the...Ch. 43 - Nutrient and waste requirements for the developing...Ch. 43 - Progesterone is made during the third trimester by...Ch. 43 - Which contraceptive method is 100 percent...Ch. 43 - Which type of short term contraceptive method is...Ch. 43 - Which hormone is primarily responsible for The...Ch. 43 - Major organs begin to develop during which part of...Ch. 43 - Which of the following is false? The endoderm,...Ch. 43 - During cleavage, the mass of cells: increases...Ch. 43 - Which of the following gives rise to the skin...Ch. 43 - The ribs form from the ___________ . notochord...Ch. 43 - Why is sexual reproduction useful if only half the...Ch. 43 - What determines which sex will result in offspring...Ch. 43 - What are the advantages and disadvantages of...Ch. 43 - Why would paired external fertilization be...Ch. 43 - Describe the phases of the human sexual response.Ch. 43 - Compare spermatogenesis and oogenesis as to timing...Ch. 43 - If male reproductive pathways are not cyclical,...Ch. 43 - Describe the events in the ovarian cycle leading...Ch. 43 - Describe the major developments during each...Ch. 43 - Describe the stages of labor.Ch. 43 - What do you think would happen if multiple sperm...Ch. 43 - Why do mammalian eggs have a small concentration...Ch. 43 - Explain how the different germ layers give rise to...Ch. 43 - Explain the role of axis formation in development.
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- Write a short note on fertilization in Riccia ?arrow_forward1. DAY 1 (Gestational)- stage:____________ event:_________________________2. DAY 8 (Fertilization)- stage:____________ event:_________________________3. DAY 14 (Gestational)- stage:____________ event:________________________4. DAY 6 ( Gestational)- stage:____________ event:________________________5. DAY 2 ( Fertilization)- stage:____________ event:__________________________6. DAY 3 ( Gestational)- stage:____________ event:___________________________7. DAY 12 ( Fertilization)- stage:____________ event:___________________________8. DAY 11 ( Gestational)- stage:____________ event:___________________________9. DAY 5 ( Gestational)- stage:____________ event:___________________________10. DAY 6 ( Fertilization)- stage:____________ event:_______________arrow_forwardHello! I have a question. Question: Describe what the offspring (fish) that is complete dominance looks like. (Picture below)arrow_forward
- Contrast the biological advantages of hermaphroditism that involves cross-fertilization with hermaphroditism that involves self-fertilization.arrow_forwardIn sea urchin, which step of egg and sperm recognition involves the formation of a fertilization cone? Sperm binding to the egg's vitelline membrane Fusion of the sperm and egg membranes Acrosomal reaction Chemo-attraction Sperm binding to the egg's jelly coatarrow_forwardPolygyny is a common mating system in nature. Which one of the following scenarios is LEAST likely to result in a polygynous mating system? Male stalk-eyed flies form leks where receptive females come visit Male Neotropical giant damselfly defend water-filled tree holes, which are the oviposition sites for females. Suitable tree holes for oviposition are rare and females must mate with the resident male in exchange for access to the oviposition sites. Male Bengal tigers defend large territories that contain food sources. Female Bengal tigers visit male territories to mate. The density of the Bengal tiger is extremely low that male tigers rarely encounter more than one female in their lifetime. In the bumblebee-wolf Philanthus bicinctus, females are unreceptive until they finish constructing the long underground burrow as nest sites. Males search for locations containing a number of newly constructed burrows and attempt to control these sites against the intruders. Your cousin Peter…arrow_forward
- What prevents an individual from mating with itself?arrow_forwardWhat is one challenge posed by copulation between separate sexes? What are some adaptations that grasshoppers have developed that address these challenges?arrow_forwardWhat biological mechanisms account for the resemblance between offspring and their parents? Exmpain step by step in your own words.arrow_forward
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Reproduction: Crash Course Zoology #9; Author: CrashCourse;https://www.youtube.com/watch?v=poLyJDVjKlM;License: Standard youtube license