WorksheetsCBA 2 Review
Total questions: 86
Worksheet time: 5hrs 31mins
Canis lupus
ATG TGA CAG
All children born with a certain lethal genetic disease die within a few years of birth. Nonetheless, the disease continues to occur within human populations. What is the most likely explanation of this fact?
The mutation for the disease continually recurs in human populations.
People with the allele for the disease mate randomly with people with and without the allele.
The disease is caused by a dominant allele; therefore, if one chromosome has the allele, the person will have the disease.
Parents can be carriers of the disease without being affected by the disease; therefore, the allele stays in the population
In a forest, the color of tree bark gradually darkens over many years due to industrial pollution. A population of light-colored insects hides from predators during the day on the tree trunks. Which effect would the change in tree color most likely have on a dark-colored gene in the insect population?
Mutations wills be more likely to produce the dark-colored gene
The dark-colored gene will shift from recessive to dominant
The frequency of the dark-colored gene will rise in the population
Offspring will be more likely to inherit the dark-colored gene if one of their parents has the gene
Which observation could best be used to indicate an evolutionary relationship between two species?
They have similar base sequences.
They have similar fur color.
They inhabit the same geographic regions.
They occupy the same niche.
Which fossil provides the most compelling evidence of the theory of evolution?
A fossil of a shelled marine organism unlike any alive today
A fossil of an ancient tree with flower and seed parts very similar to those in trees today
A fossil of a dinosaur nest and an adult showing evidence of parental care
A fossil of an animal with some characteristics of reptiles and some characteristics of birds
Ancestral birds and mammals share a common ancestor that was terrestrial, however, mammals and fish do not. Today, penguins (which are birds) and seals (which are mammals) have forelimbs adapted for swimming. Fish have fins adapted for swimming. What term best describes the relationship of the bones in the forelimbs of penguins and seals, and what term best describes the flippers and fins of penguins and fish.
Homologous; homologous
Analogous; homologous
Homologous; analogous
Analogous; analogous
For centuries, living things were classified into two kingdoms, Plantae and Animalia. In 1876, Ernst Haeckel proposed a "tree of life" model that added a new kingdom, Protista, resting on a base of organisms he called Moneres. Around 1980, scientists proposed a six-kingdom system that discarded the tree of life model but kept Protista as a kingdom.
How do protists differ from plants and animals?
protists usually lack DNA
protists produce their own food
protists are usually unicellular
protists have many nuclei in each cell
According to the chart below, which two organisms are most similar and closely related?
Organisms 1 and 2
Organisms 2 and 3
Organisms 1 and 3
Organisms 3 and 4
Convergent evolution is the development of body structures that have similar functions but have evolved independently. Which pair of structures best illustrates convergent evolution?
the paw of a grizzly bear and the paw of a polar bear
the tail of a great white shark and the tail of a blue whale
the neck bones of a giraffe and the neck bones of a cat
the tail of a crocodile and the tail of a horse
Use the table to answer the question.
Sharks and seals both have live births and probably have a common ancestor different from seals.
All three groups have such unique properties that it is unlikely they have a common ancestor.
Sharks and dolphins have similar features and probably have a common ancestor different from seals.
Seals and dolphins have similar bones and probably have a common ancestor different from sharks.
This is a structure that was inherited but has lost most of its original function
homologous
analogous
vestigial
homozygous
