WHAT IS LIFE LL W/ LAUNCHPAD
4th Edition
ISBN: 9781319231859
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 16, Problem 8MC
Summary Introduction
Introduction:
The average life span of a population is influenced by environmental factors and natural selection.
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Sexual reproduction provides an advantage to organisms because it increases the
A.
size of the genome of a species.
B.
genetic variability in a population.
C.
fitness of individual alleles of a gene.
D.
number of mutations during cell division.
Of the following, which is the least plausible hypothesis for why natural selection has not eliminated genes for male homosexuality? a. Perhaps the relatives of a homosexual male have more than an average number of children. b. Homosexual people might spread their genes by helping their brothers and sisters rear their children. c. Maybe there is no gene for homosexuality. Instead, an environmental event produces an epigenetic effect that can be transmitted from one generation to the next. d. Some homosexual men have children.
Mutations cause variations among individuals. If these variations provide an advantage to individuals, then the resulting traits are known as adaptations. Which of the following statements about adaptations is incorrect?
A. They are structural or physiological in nature.
B. They modify the behaviour of organisms.
C. They provide a selective advantage in any environment.
D .They increase reproductive success of organisms.
Chapter 16 Solutions
WHAT IS LIFE LL W/ LAUNCHPAD
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- Provided with the evidences on the picture, choose which of these represents descent with modification. Why it is considered as a descent with modification? provide one theory to support your answerarrow_forwardIn the movie on rock pocket mice, what did the team discover about black colouration? Select the ONE BEST answer. a. Fur colouration is the result of a new adaptive behaviour where pocket mice rolled in lava dust to camouflage themselves. b. It is the result of the same, single mutation in all populations. C. Different mutations cause similar dark colouration in different populations. d. One specific mutation causes black or white fur depending on the population. e. Fur colouration is the result of dietary changes in different environments, not natural selection.arrow_forwardWhich of the following best explains the role mutations play in natural selection?A. Most mutations are negative and result in the extinction of the entire speciesB. Mutations may appear for one or two generations, but they usually disappear quickly.C. If the environment changes, an existing organism develops a mutation that will help them to survive.D. Some mutations give individuals an advantage in their environment, allowing them to survive and reproduce.D is my answer is it correct?arrow_forward
- Darwin's concept of evolution "the theory of decent with modification through variation and natural selection" can best be demonstrated by which of the following examples? a. A giraffe stretches his neck to reach higher branches. The exercise of stretching up strengthens the muscles in the giraffe's neck and legs. This ability to stretch is also seen in the giraffe's offspring. b. A monkey accidentally drops her fruit in the salty water of a bay. She recovers the fruit and eats it. She discovers the fruit is cleaner and tastes better after it has been in the salty water. She continues to wash the fruit in the bay before eating it. Her offspring see what she has done and also wash their fruit in the salty water. Soon, the whole population of monkeys is washing their fruit. c. Several turtles hatch from a clutch of eggs buried in the sand on a beach. One of the turtles is the color of the sand; the others are darker in color. The turtles scurry toward the water,…arrow_forwardConsider all of the species on earth. Some scientists believe that the genes for growth and reproduction have been under evolutionary forces for longer than those involved in maintenance and repair. Which statement below best supports their theory? a. Most species die after producing offspring. b. “Survival of the fittest” is true. c. Most animal species mate for life. d. Only the more intelligent organisms live long lives.arrow_forwardBackground: In class we did a project about m and m’s and there ability to evolve and natural selection. (Yes I know they can’t actually evolve it was just used as a example in class) however I can’t figure out this question. Occasionally a mutant may occur and produce a candy that is misshapen or Pointier or flatter than the rest. Often this proves to be a weakness, but a rare mutation may confer extra M&M durability. Other mutations in M&Ms could occur ( like ones that result in a new color). A mutant un you population represents a new _________. What goes in the blankarrow_forward
- Hox genes are activated in specific regions of the body (e.g. back of the head) and activate other genes to build specific structures in those regions. This was largely discovered by looking at the effects of mutants of the various hox genes. What other technique would provide information on the action of hox genes? Group of answer choices A. copy hox genes and place them in bacteria B. copy hox genes and place them in plants C. completely remove all hox genes from the genome D. change the control of hox genes so that they are expressed in different body regions E. reverse the order of the hox genes on the chromosomearrow_forwardWith regard to biological evolution, which of the following statements is incorrect? Explain why.A. During its lifetime, an animal evolves to become better adaptedto its environment.B. The process of biological evolution has produced species thatare better adapted to their environments.C. When an animal is better adapted to its environment, the process of natural selection makes it more likely that the animalwill reproduce.arrow_forwardWhich of the following statements about dominant traits is correct? a. The dominant trait is the one that is expressed. b. They are observed three-fourths as frequently as heterozygous traits. c. They are observed less frequently than recessive traits. d. They increase in frequency over evolutionary time. e. The dominant trait is typically masked by the recessive trait.arrow_forward
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