Genetics and Developmental Biology

6 years ago

The same basic internal organs (kidneys, stomach, heart, lungs) are found in frogs, birds, snakes. ...

The same basic internal organs (kidneys, stomach, heart, lungs) are found in frogs, birds, snakes. and rodents. This is primarily an example of
A) structural homology.
B) developmental homology.
C) genetic correlation.
D) inherit

dracko 128 1 Reply

6 years ago

Whether species change over time and (2)whether they are related by common ancestry. 12) You ...

whether species change over time and (2)whether they are related by common ancestry.

12) You sequence the genes that code for an important glycolytic enzyme in a moth, a mushroom, a worm, and an alga, and find a high degree of sequence si

pkclary 65 1 Reply

6 years ago

Whether species change over time and (2)whether they are related by common ancestry. 13) ...

whether species change over time and (2)whether they are related by common ancestry.

13) Evolutionary theory predicts that species are related, not independent. Four of the following examples provide support for this prediction, but one i

ceybe 70 1 Reply

6 years ago

Whether species change over time and (2)whether they are related by common ancestry. 14) Which of ...

whether species change over time and (2)whether they are related by common ancestry.

14) Which of these conditions are always true of populations evolving due to natural selection?
Condition 1: The population must vary in traits that

dracko 69 1 Reply

6 years ago

Which of the following has the highest Darwinian fitness?

Which of the following has the highest Darwinian fitness?
A) A personal trainer who works out at the gym every day
B) A scientist who devotes herself to science and wins the Nobel Prize
C) A sperm donor who anonymously fathers 52 child

pkclary 92 1 Reply

6 years ago

A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the ...

A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these explanations best descr

pkclary 77 1 Reply

6 years ago

A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the ...

dracko 78 1 Reply

6 years ago

Your text discusses the evolution of antibiotic-resistant M. tuberculosis bacteria in a patient. ...

Your text discusses the evolution of antibiotic-resistant M. tuberculosis bacteria in a patient. Researchers discovered that the strain of M. tuberculosis taken from the dead patient has a point mutation in the rpoB gene that codes for part of the RN

pkclary 101 1 Reply

6 years ago

Which of the following is the best modern definition of evolution?

Which of the following is the best modern definition of evolution?
A) descent without modification
B) change in allele frequencies in a population over time
C) survival of the fittest
D) inheritance of acquired characters

dracko 63 1 Reply

6 years ago

After the drought of 1977, researchers hypothesized that on Daphne Major, medium ground finches with ...

After the drought of 1977, researchers hypothesized that on Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. If

dracko 77 1 Reply

6 years ago

Tourist companies start visiting Island X, where the new colony of medium ground finches (see ...

Tourist companies start visiting Island X, where the new colony of medium ground finches (see previous question) feeds on the tough-fruited Tribulus cistoides. The tourist companies set up reliable feeding stations with a variety of bird seeds (diffe

pkclary 135 1 Reply

6 years ago

, 2004: 2426-37.22) Claytonia virginica is a woodland spring herb with flowers that vary from white ...

, 2004: 2426-37.

22) Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. This plant is primarily pollinated by a bee that prefers pink flowers to white flowers. Claytonia with pink f

Dugg 77 1 Reply

6 years ago

Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to ...

Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe

ceybe 100 1 Reply

6 years ago

Refer to Figure 24.1. In their investigation of natural selection on Mc1r alleles (the gene that ...

Refer to Figure 24.1. In their investigation of natural selection on Mc1r alleles (the gene that determines coat color) in Arizona pocket mice, Hoekstra et al. determined the frequency of the D and d alleles in each population. They also determined t

dracko 95 1 Reply

6 years ago

Figure 24.3In Figure 24.3, chart X above shows the frequency of the most common neutral ...

Figure 24.3

In Figure 24.3, chart X above shows the frequency of the most common neutral mitochondrial DNA allele (an allele for a gene that does not affect and is not linked to coat color) across six pocket-mouse populations. Populations

pkclary 108 1 Reply

6 years ago

Evolution by natural selection changes the population but not the individual.

Evolution by natural selection changes the population but not the individual.
A) true
B) false

dracko 78 1 Reply

6 years ago

Which of the following is an example of acclimation?

Which of the following is an example of acclimation?
A) Some hemoglobins have a higher affinity for oxygen than others.
B) Some animals grow thicker coats when exposed to low temperatures.
C) Some bacteria can use the energy from sunli

ceybe 63 1 Reply

6 years ago

Vestigial traits and neutral changes in DNA sequences are good examples of:

Vestigial traits and neutral changes in DNA sequences are good examples of
A) adaptation.
B) acclimation.
C) convergent traits.
D) nonadaptive traits.
E) developmental homology.

Dugg 64 1 Reply

6 years ago

Whether species change over time and (2)whether they are related by common ancestry. 32) Which of ...

whether species change over time and (2)whether they are related by common ancestry.

32) Which of the following is a fitness trade-off?
A) In some hornbill species, the male helps seal the female in a tree with her nest until the you

pkclary 69 1 Reply

6 years ago

A patient has finished his treatment for a bacterial infection with an antibiotic and feels better. ...

A patient has finished his treatment for a bacterial infection with an antibiotic and feels better. However, four days later the same bacterial infection returns. The doctor prescribes the same course of antibiotics, but this time these antibiotics d

pkclary 95 1 Reply

6 years ago

Read the scenario above. If the population is maintained on media that lacks rifampin, what is ...

Read the scenario above. If the population is maintained on media that lacks rifampin, what is expected to occur over a period of time?
A) The rifampin resistant bacteria will increase in proportion compared to the rifampin susceptible bacteria.

pkclary 62 1 Reply

6 years ago

Evolution of antibiotic resistant bacteria represents which of the following?

Evolution of antibiotic resistant bacteria represents which of the following?
A) naturalselection
B) genetic drift
C) artificial selection
D) reproductive selection

Dugg 87 1 Reply

6 years ago

A population of rabbits grows explosively because resources are high. However, now that numbers have ...

A population of rabbits grows explosively because resources are high. However, now that numbers have increased substantially, there is not enough food for all individuals and the population is threatened. What will happen under such circumstances?

pkclary 158 1 Reply

6 years ago

According to the theory of evolution by natural selection, which of the following is FALSE?

According to the theory of evolution by natural selection, which of the following is FALSE?
A) The individuals that survive to reproduce are a random sample of the population.
B) Natural selection occurs at the level of the individual, but

pkclary 88 1 Reply

6 years ago

Fishers typically target the largest, and thus, oldest fish. Given this fishing strategy, which of ...

Fishers typically target the largest, and thus, oldest fish. Given this fishing strategy, which of the following would be the most likely outcome due to natural selection over time on life history traits. Which of the following best predicts the effe

pkclary 77 1 Reply

6 years ago

The changes in the commercially popular fish populations' life history traits is an example of what ...

The changes in the commercially popular fish populations' life history traits is an example of what type of selection pressure?
A) strong
B) weak
C) neutral

pkclary 80 1 Reply

6 years ago

Suppose 64% of a remote mountain village can taste phenylthiocarbamide (PTC) and must therefore have ...

Suppose 64% of a remote mountain village can taste phenylthiocarbamide (PTC) and must therefore have at least one copy of the dominant PTC taster allele. If this population conforms to Hardy-Weinberg expectations for this gene, what percentage of the

dracko 268 1 Reply

6 years ago

For biologists studying a large flatworm population in the lab, which Hardy-Weinberg condition is ...

For biologists studying a large flatworm population in the lab, which Hardy-Weinberg condition is most difficult to meet?
A) no selection
B) no genetic drift
C) no gene flow
D) no mutation
E) random mating

ceybe 75 1 Reply

6 years ago

Refer to Figure 25.1. Is this population in Hardy-Weinberg equilibrium?

Refer to Figure 25.1. Is this population in Hardy-Weinberg equilibrium?
A) yes
B) No; there are more heterozygotes than expected.
C) No; there are more homozygotes than expected.
D) More information is needed to answer this questi

Dugg 131 1 Reply

6 years ago

Measured the snout-to-vent (anus) length of Galápagos marine iguanas and observed the percent ...

measured the snout-to-vent (anus) length of Galápagos marine iguanas and observed the percent survival of different-sized animals. Figure 25.2 shows the log snout-vent length (SVL, a measure of overall body size) plotted against the percent survival

pkclary 132 1 Reply

6 years ago

Wikelski and Romero (2003) found that large marine iguanas had higher reproductive success than ...

Wikelski and Romero (2003) found that large marine iguanas had higher reproductive success than smaller iguanas did. However, the large iguanas were generally in poor body condition because they could not eat enough; at higher temperatures their fora

Dugg 89 1 Reply

6 years ago

Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is ...

Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is not correlated with risk of hawk predation, although small iguanas can sprint faster than large iguanas. If predators (e.g., cats) that preferably catch

ceybe 118 1 Reply

6 years ago

Based on the information given above, which of the following types of selection was most likely ...

Based on the information given above, which of the following types of selection was most likely initially involved in the evolution of white outer tail feathers in juncos?
A) directional selection
B) stabilizing selection
C) disruptive

pkclary 64 1 Reply

6 years ago

The UCSD campus male junco population tails are about 36% white, whereas the tails of males from ...

The UCSD campus male junco population tails are about 36% white, whereas the tails of males from nearby mountain populations are about 40-45% white. The founding stock of UCSD birds was likely from the nearby mountain populations because some of thos

dracko 205 1 Reply

6 years ago

Cystic fibrosis is a genetic disorder in homozygous recessives (ff) that typically causes death in ...

Cystic fibrosis is a genetic disorder in homozygous recessives (ff) that typically causes death in the early 30s. Over time, we would expect the f allele frequency to ________ for this trait.
A) remain the same
B) increase
C) decrease

ceybe 152 1 Reply

6 years ago

Which of the graphs above best represents the relationship between the intensity of directional ...

Which of the graphs above best represents the relationship between the intensity of directional selection and the genetic variation present within a population?

pkclary 59 1 Reply

6 years ago

A biologist doing a long-term study on a wild spider population observes increased variation in silk ...

A biologist doing a long-term study on a wild spider population observes increased variation in silk thickness. She hypothesizes that the population is experiencing
A) directional selection.
B) stabilizing selection.
C) disruptive sel

pkclary 66 1 Reply

6 years ago

In a small population of alpine foxes, you observe increased ear length over a 10-year period. Can ...

In a small population of alpine foxes, you observe increased ear length over a 10-year period. Can you conclude that increase in ear length is advantageous in this population?
A) yes
B) no

pkclary 69 1 Reply

6 years ago

Genetic drift occurs in a population. Which of the following statements might be true?

Genetic drift occurs in a population. Which of the following statements might be true?
A) Genetic drift increased the population's fitness.
B) Genetic drift decreased the population's fitness.
C) The population was relatively

dracko 124 1 Reply