Pretest

Question 1

Amaya collected insects in the forest. She was unable to identify one unusual looking insect using a dichotomous key. Amaya concluded that the insect must be a new species. Which facts would support the conclusion that the insect is a new species?

Revolt · Accepted Answer

C: Several other thorough and up-to-date dichotomous keys also failed to identify the insect.

Question 2

A botanist observes a large population of a particular type of beetle eating the leaves of one tree but not the leaves of a nearby tree. What should the botanist do first to study the interaction of these organisms in the ecosystem?

Revolt · Accepted Answer

B: Identify the species of the beetle and the species of both trees.

Question 3

Which best describes a dichotomous key?

Revolt · Accepted Answer

A: Each step has two choices.

Question 4

A scientist wants to study the interactions of different birds in the southern part of a desert. What should the scientist do first?

Revolt · Accepted Answer

D: Identify each bird species by using a dichotomous key.

Question 5

Rory is trying to identify a tree from one of its leaves. A question on the dichotomous key that he is using asks whether the leaf has 3-5 lobes or more than 5 lobes. Rory cannot tell whether the leaf in his hand has 5 or 6 lobes. What should Rory do to continue identifying the tree?

Revolt · Accepted Answer

C: Look at other leaves from the same tree, and count how many lobes they have.

Question 6

Observations of organisms include

Revolt · Accepted Answer

C: descriptions of the number, size, and arrangement of parts of the organism.

Question 7

How is a dichotomous key used?

Revolt · Accepted Answer

A: Observable characteristics of the organism are checked through a sequence of two-part steps until an identification is listed in the key.

Question 8

A series of choices between two characteristics that is used to identify organisms is called a

Revolt · Accepted Answer

C: dichotomous key.

Question 9

Dichotomous keys ask

Revolt · Accepted Answer

A: yes-or-no questions about easily observable characteristics.

Question 10

Which number on the dichotomous key represents the point of differentiation between organism cap x from organism cap z ?

Revolt · Accepted Answer

B: branch 3

Pretest Answers

More from this Course

TRY EDGENUITY HACKS