WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
5th Edition
ISBN: 9781319272531
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 11, Problem 7SA
Summary Introduction
To review:
Ways in which male and female mammals make unequal contributions to reproduction.
Introduction:
Initially the females contribute more to reproduction.
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How do different types of energy investment by females contribute to the reproductive success of a frog, a chicken, and
human?
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embryos have gelatinous coat and
lack internal membranes
internal fertilization
external fertilization
embryos have internal membrane
invest energy to the protection of their
embryos by strong shells
invest energy to the gamete
production
invest energy to the protection of their
embryos by internal development
Frog
Chicken
Human
Describe the advantages and disadvantages of asexual reproduction and sexual reproduction. Provide three examples of animals that engage in each type of reproduction.
Egg laying in fruit flies can be triggered (induced) when males transfer their sperm to females. Which of the following is a selective advantage of induced egg laying for the male flies?
Less time and energy is expended by the male.
The males do not have to produce as much sperm.
More eggs can be fertilized.
A male fly's sperm is more likely to be used for fertilization.
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WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
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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
- Identify the functions of the three major hormones that controlgrowth and development in insects.arrow_forwardMate guarding is an evolved response to sperm competition. Chimpanzee (Pan troglodytes) females regularly mate with several males in the same estrous cycle, whereas gorilla (Gorilla gorilla) females almost never do, since they typically live in bands, each controlled by a single, powerful male. How large (as a proportion of body size) should the testes of chimpanzee males be relative to gorilla testes (Harcourt et al. 1981)? If the testes of men are more similar to those of chimpanzees, what would this tell us about the intensity of sperm competition during our evolutionary past? If, on the other hand, human testes resemble those of gorillas, what conclusion is justified? Please don't write from any online source.arrow_forwardWhich factors are responsible for successful reproduction in male? Do you think the reproductive efficiency of male is declining with the passage of time? Support your point of view with examples.arrow_forward
- Briefly compare and contrasts the advantage of asexual and sexual reproduction. Which one is most common in animals?arrow_forwardGive account of events that occur following mating and before the onset of cleavage in mammalsarrow_forwardDescribe an example of each of the following: a pre-zygotic barrier to reproduction a post-zygotic barrier to reproductionarrow_forward
- Describe and distinguish patterns of reproduction in monotremes, marsupials, and placental mammals. What aspects of mammalian reproduction characterize all mammals but no other vertebrates?arrow_forwardMales of certain Australian beetles have been seen trying to copulate with everything from beer bottles to large orange signs. Apply ethological terminology to these cases by identifying the releaser, the fixed action pattern, and the innate releasing mechanism. Then develop an ultimate hypothesis to account for what clearly is maladaptive behavior on the part of these obtuse beetles (which sometimes die rather than leave the inanimate and unresponsive copulatory partners that they have chosen). (Don't use any online resource)arrow_forwardDescribe the biological basis for the 1 : 1 ratio of malesand females at conception in mammals.arrow_forward
- explain how chromosome behaviour during sexual reproduction in animals ensures perpetuation of parental traits in offspring and, at the same time, gentetic variation among offspring.arrow_forwardFemale mammals undergo continuous reproductive cycles during their reproductive life. In the sense of offspring production, what is the benefit of these continuous cycles?arrow_forwardAnimals attract mates through a variety of behaviors. Diurnal animals tend to rely on visual cues, while nocturnal ones make frequent use of pheromones. In recent years, environmental pollutants called endocrine disruptors are on the rise. Such chemicals mimic hormones in higher-order animals and interfere with the reproductive cycle.arrow_forward
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