Using your knowledge of the feedback loops of human female hormones, which event would result from high levels of estrogen and progesterone in the blood?

A) lack of growth of the corpus luteum
B) thickening of the uterine lining
C) increased secretion of FSH
D) increased levels of LH
E) increased menstrual flow

About 200 years ago, Jan Baptista van Helmont wondered how growing plants obtained the materials necessary for growth. He planted a tree seedling weighing 5 pounds in a barrel filled with 200 pounds of soil and then watered the tree regularly. After five years, the tree weighed 169 pounds, 3 ounces, and the soil weighed 199 pounds, 14 ounces. Because the tree had gained so much weight and the soil had lost so little, he concluded that the tree had gained all of its additional weight by absorbing the water he had added to the barrel. Of course he was incorrect. What really happened?

Fibroblasts and protein fibers are associated with both ________ and ________.

A) dense regular; dense irregular connective tissues
B) plasma; formed elements
C) elastic cartilage; hyaline cartilage
D) spongy bone; compact (dense) bone
E) adipose tissue; reticular tissue

How did Neanderthal anatomy differ from Homo sapiens?

A) wider shoulders and hips
B) stockier build
C) some had larger brains
D) a and b
E) a, b, and c

Which classification category includes the most species?

A) family
B) genus
C) class
D) phylum
E) kingdom

________ are chemicals that are taken into the body and used to produce energy or provide building blocks for new molecules.

A ____ is required to transfer genes from one organism to another.

A) vector
B) reverse transcriptase
C) transport molecule
D) genetic probe
E) PCR device

The best definition of population density is the number of individuals:

A) of all species in a given area.
B) of one species in a given area.
C) in a given area at a given time.
D) of all species in a given area at a given time.
E) of one species in a given area at a given time.