BIOLOGY (LOOSELEAF)-W/CONNECT
12th Edition
ISBN: 9781260692181
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 51, Problem 2S
Why do you think that amphibians and many fish have external fertilization, whereas lizards, birds, and mammals rely on internal fertilization?
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Students have asked these similar questions
What happens in the process of fertilization in animals and humans?
A:
Why do sea urchins have external fertilization? [Discuss the life style of the developing sea urchin embryo in the water column compared to a very different ecological niche of the adults on the ocean floor. Besides, would you want to give live birth to a sea urchin! ouch!]
2:
Then why don't the parents take care of the young? [In fact the adults do in a way. After the embryo has grown large enough and metamorphosed into a young urchin they hide in the spines of the adults, living off of the scraps of food produced from the messy eating of the adults]
3:
Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?
In the list of animals given below, hen is the odd one out.Human being, cow, dog, henThe reason for this is:
(a) it undergoes internal fertilisation.
(b) it is oviparous.
(c) it is viviparous.
(d) it undergoes external fertilisation.
Chapter 51 Solutions
BIOLOGY (LOOSELEAF)-W/CONNECT
Ch. 51.1 - Prob. 1LOCh. 51.1 - Prob. 2LOCh. 51.1 - Prob. 3LOCh. 51.2 - Prob. 1LOCh. 51.2 - Prob. 2LOCh. 51.3 - Prob. 1LOCh. 51.3 - Prob. 2LOCh. 51.3 - Prob. 3LOCh. 51.4 - Prob. 1LOCh. 51.4 - Explain ovulation and the female reproductive...
Ch. 51.4 - Prob. 3LOCh. 51.5 - Prob. 1LOCh. 51.5 - Describe causes of infertility.Ch. 51 - Prob. 1DACh. 51 - Why might it be adaptive for an individual to be...Ch. 51 - Prob. 2IQCh. 51 - Why do you think the brain is affected when the...Ch. 51 - You have discovered a new organism living in tide...Ch. 51 - Prob. 2UCh. 51 - Prob. 3UCh. 51 - Which of the following structures is the site of...Ch. 51 - FSH and LH are produced by the a. ovaries. b....Ch. 51 - Prob. 6UCh. 51 - Mutations that affect proteins in the acrosome...Ch. 51 - In humans, fertilization occurs in the____, and...Ch. 51 - The testicles of male mammals are suspended in the...Ch. 51 - Prob. 1ACh. 51 - Which of the following is a major difference...Ch. 51 - Prob. 3ACh. 51 - Internal and external fertilization differ in that...Ch. 51 - Prob. 1SCh. 51 - Why do you think that amphibians and many fish...Ch. 51 - How are the functions of FSH and LH similar in...Ch. 51 - Prob. 4SCh. 51 - Why are all parthenogenic parents female?
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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
- What are three notable features between the fertilized and unfertilized egg?arrow_forwardWhat mechanisms have evolved in animals with(a) external fertilization and (b) internal fertilizationthat help offspring survive to adulthood?arrow_forwardWhich of the following statements about reproduction in humans is correct? (a) Fertilisation takes place externally. (b) Fertilisation takes place in the testes. (c) During fertilisation egg moves towards the sperm. (d) Fertilisation takes place in the human female.arrow_forward
- Why is the ovum so much bigger than a sperm cell? 1)It already contains all the chromosomes that will determine the zygote's traits. 2)It must store enough food for the growth of the zygote into an embryo. 3)Its big size allows the sperm to locate it better inside the oviduct. 4)A big ega is easier to implant in the uterus after tertilization.arrow_forwardWhat are the advantages and disadvantages of internal fertilization over external fertilization? How about the advantages and disadvantages of external fertilization over internal fertilization? Enumerate.arrow_forwardIn human beings, the correct sequence of events during reproduction is: (a) gamete formation, fertilisation, zygote, embryo (b) embryo, zygote, fertilisation, gamete formation (c) fertilisation, gamete formation, embryo, zygote (d) gamete formation, fertilisation, embryo, zygotearrow_forward
- Birds, reptiles and insects have something in common as far as the development of their embryos. What do they have in common?arrow_forwardAquatic animals in which fertilisation occurs in water are said to be: (a) viviparous without fertilisation. (b) oviparous with external fertilisation. (c) viviparous with internal fertilisation. (d) oviparous with internal fertilisation.arrow_forwardWhat is the adaptive significance of having sperm and egg produced at different times?arrow_forward
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