Gr 8 U1Mod 2 Test

Front

Each pair of chromosomes contains ___________ variants of a gene.

Back

2

Front

Over time, the rocks on which the snails lived became covered with dark-colored seaweed. Which graph best represents the range of colors in the snail population that resulted from natural selection after the dark-colored?

Back

Front

Some animals hunt at night to conserve energy. Bears hibernate in the winter to conserve energy. These are examples of...

Back

behavioral adaptations

Front

Use the following table to answer the next question. A family visited a dog breeder and requested a puppy that had short fur and was friendly and lovable. Which dogs should the breeder select to be the parents of the requested puppy?

Back

2 and 3

Front

What does this sequence illustrate?

Back

how variation results in an adaptation

Front

A student prepared this chart comparing examples of natural selection with artificial selection. Which can the student add in the column under artificial selection to complete the chart?

Back

1 and 2

Front

Below is a diagram that shows a segment of DNA before and after replication. Which could have occurred as a result of this change in structure?

Back

all option choices could occur

Front

Which of the following could be illustrated by the bird eating the white moth?

Back

competition

Front

The following diagram shows one way a mutation can form during DNA replication. What kind of mutation has occurred during the DNA replication shown?

Back

substitution

Front

The mutation shown resulted in muscle degeneration. The effect of this mutation is that muscles become progressively weaker. What type of mutation is this?

Back

negative mutation