When are expert judges needed to determine the content validity of a test?

a. always

b. when the trait being measures is ill-defined

c. when the trait being measured is highly technical

d. all of the above?

A girl walks 2 km north, then 2 km east, then 2km south, then 2km west. what distance does she travel? what is her displacement?

Which statement below is NOT true? a. Deforestation make soil vulnerable to drying out. b. Deforestation results in loss of roots that stabilize soil. c. Deforestation prevents desertification. d. Deforestation decreases biodiversity.

Which of the following statements regarding NK cells is a false or incorrect statement? NK cells are present in the blood, spleen, lymph nodes, and red bone marrow; NK cells attack cancer cells and virus-infected body cells;

What is an example of an unsaturated fat? butter lard chicken fat corn oil

What structure prevents reflux of stomach contents?

Which occurs directly before a hypothesis?

What is the name of groups who frequently travel to gather food and hunt animals?

You are observing two juvenile chimpanzees. When they first meet, they embrace. They then begin tickling each other and wrestling mildly. Would you characterize this behavior as affiliative or aggressive?

Why do many different types of proteins exist even though there are a limited number of amino acids

What is a difference between embryonic and adult stem cells? embryonic stem cells are undifferentiated; adult stem cells are partially differentiated. it is easier to enucleate embryonic stem cells.