Which term defines an embryo after the second month of development? a sperm

a fetus

a nucleus

an ovum

Which system includes the brain, spinal cord, and nerves?

respiratory

digestive

nervous

circulatory

Which reproductive cells are supplied by the male?

fetal

embryonic

sperm

ovum

Which part of the cell makes an exact copy during cell division?

ovum

membrane

nucleus

sperm

Which traits does DNA contain code for?

personality traits

inherited traits

dominant traits

recessive traits

Which gland controls the workings of other endocrine glands?

thymus

adrenal

thyroid

pituitary

Which action best increases one's stamina?

exercising so much that one lacks sleep

refusing to exercise to save the energy needed to work

exercising on a regular basis

exercising only when one feels like it

Which term defines a stage that is reached by going through adolescence?

a growth spurt

mood swings

maturity

puberty

Which substance in the body is protected by circulatory and respiratory systems?

hormone

chromosome

oxygen

DNA

Which action could result in an adolescent ineffectively managing his or her feelings?

exercising on a regular basis

talking to trusted adults

getting less sleep

reducing stress

Which system contains the liver, pancreas, and stomach?

digestive

respiratory

endocrine

circulatory

Which action is the cerebrum responsible for?

coordination

problem solving

breathing

balance

Which characteristic is true of both boys and girls during puberty?

weight loss

a curvier shape

body hair

a deeper voice

Which system contains the heart, blood, and blood vessels?

circulatory

digestive

respiratory

muscular

When do people generally experience rapid growth for a second time?

between the ages of 3 and 5

between the ages of 15 and 20

between the ages of 25 and 29

between the ages of 8 and 14

Which system contains the pituitary, adrenal, and thyroid glands?

reproductive

endocrine

circulatory

respiratory

Which action occurs in the third stage of cell division?

The nuclear membrane disappears.

The nuclear material of a cell is copied exactly.

The cell forms two nuclei.

The nuclear material separates, with half moving to either side of the cell.