Biology
Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 54, Problem 2S
Summary Introduction

To determine:

The expectations from old individuals to have the same “optimal” reproductive effort as young individuals. When there is a tradeoff between current reproductive effort and future reproductive success. Refer to figure 55.13.

Introduction:

When the survival of a population is calculated in the percentage according to their given age is known as survivorship. The age of the organism declines and decreases the probability of the animal to the next year.

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Is the following case study an r-strategist or a K-strategist? American toads practice explosive reproduction. During the first warm days in spring, both males and females migrate from forests and converge on ponds. Reproduction is quick, taking only a few days. Females lay hundreds of eggs in jelly-filled sacks along the sides of the pond or stream. As soon as the eggs are laid, males and females abruptly leave the pond. Offspring are left to develop, hatch, and grow on their own, maturing in about three months.
Which of the following factors does not contribute to a J-shaped curve? a. long life span b. fast reproductive cycle c. high number of offspring per reproductive cycle d. unlimited source of food
In an iteroparous species lifetime fitness is maximized at investment, while in semelparous species level of reproductive an intermediate maximal effort is exerted in a single reproductive event Maximal an intermediate effort is exerted in one of many reproductive events an intermediate minimal effort is exerted in a single reproductive event maximal an intermediate effort is exerted in a single reproductive event an intermediate maximal effort is exerted in one of many reproductive events

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