All lining and covering membranes consist of

1. an epithelium only.

2. epithelium and connective tissue.

3. an epithelium, a connective tissue, and smooth muscle.

4. a serosa.

Select the statement that is true concerning primary teeth. There are 27 primary teeth, and the molars are permanent. There are 32 primary teeth, and most children lose these teeth due to decay because they are never very strong.

Which part of the plant cell control the cell activities?

Albinism is an inherited genetic disorder. Explain what it is meant by inherited genetic disorder

Which of the following would be the greatest cause of mechanical weathering? oxygen the hot sun tree roots growing in rock acids

If one amino acid in a protein sequence is changed what could happen

By what process do all living organisms grow and repair themselves?

What is the name of the heart's contraction?

Which describes the habitat of a frog?

The size of a population refers to the

An electric current will always follow a. the path of least resistance. b. a path toward the north pole. c. a path toward the south pole. d. the path that leads through insulators.