Which statement gives the best example of natural selection?A A frog has a random gene mutation that changes its color.B A bird makes a loud call to attract a mate.C A lizard sits under shade in a hot desert.D A strain of bacteria has become resistant to antibiotics.
Question
Which statement gives the best example of natural selection?A A frog has a random gene mutation that changes its color.B A bird makes a loud call to attract a mate.C A lizard sits under shade in a hot desert.D A strain of bacteria has become resistant to antibiotics.
Solution
The best example of natural selection is D. A strain of bacteria has become resistant to antibiotics.
Here's why:
Natural selection is a process where organisms that are better adapted to their environment tend to survive and produce more offspring. This concept is central to the theory of evolution.
A. A frog has a random gene mutation that changes its color - This is an example of mutation, not natural selection. While mutations can lead to natural selection if the change provides a survival advantage, the statement doesn't specify that the color change benefits the frog.
B. A bird makes a loud call to attract a mate - This is an example of sexual selection, which is a subset of natural selection. However, it's not the best example as it doesn't clearly demonstrate survival of the fittest.
C. A lizard sits under shade in a hot desert - This is an example of an individual's behavior or adaptation to its environment, not a population-wide change due to natural selection.
D. A strain of bacteria has become resistant to antibiotics - This is a clear example of natural selection. The bacteria that are resistant to antibiotics survive and reproduce, while the non-resistant ones die off. Over time, the population of bacteria becomes predominantly antibiotic-resistant. This is a direct demonstration of survival of the fittest, the core of natural selection.
Similar Questions
Darwin's theory of natural selection has long been a guiding light for explaining changes in species over time. These changes happen for a number of reasons and are usually based on selective pressure.Which of the following examples is NOT an instance of natural selection?Elimination ToolSelect one answerAA group of giraffes stretching their necks in order to reach more leaves to eat.BA shift in the coloring of beetles over time to blend in with the leaves.CMore nocturnal mice in an area over time due to the presence of daytime predators.DA group of gophers getting smaller over time because they can hide in caves from predators.
Both natural and artificial threats can impact the differentiation of species in an ecosystem. Species may actually experience shifts in their genetic makeup due to an enhanced ability of a subgroup to survive and reproduce. This shift is known as natural selection.Which of the following scenarios BEST explains how a natural change in the environment could lead to natural selection?Elimination ToolSelect one answerAAs temperatures get colder in the winter, bears begin to hibernate.BIn the summer, snakes lay on rocks to warm themselves.CDuring winter months, fish slow down all of their body activities to conserve energy.DAfter a forest fire, only darker-colored species are capable of survival.
Which statement about natural selection is true?Choose 1 answer:Choose 1 answer:(Choice A) Natural selection happens because organisms in a population have variations in their inherited traits.ANatural selection happens because organisms in a population have variations in their inherited traits.(Choice B) Natural selection occurs within an individual’s lifetime.BNatural selection occurs within an individual’s lifetime.(Choice C) Natural selection can change traits in a population, but has no effect on genes.CNatural selection can change traits in a population, but has no effect on genes.
Natural selection occurs whenMultiple Choicewhen a small number of individuals of a population break away and form a new population.a factor in the environment alters the genetic information in DNA of all members of a species.only when nonrandom mating occurs.a new genetic variation occurs that allows individuals to have a reproductive and survival advantage.
Which statement is true?*1 pointNatural selection involves organisms trying to adapt and choosing which traits they need to survive in their habitat..Natural selection involves random genetic mutations in a population. Some mutations help the organism to survive and reproduce. When they reproduce their offspring will inherit the mutation as well.
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