Human Growth & Development

A developing unborn baby receives ______ and oxygen through the umbilical cord.

• carbon dioxide

• nutrients

• waste

The basic units of heredity, that define a particular trait are _____.

• egg cells

• traits

• genes

The joining of a female egg cell with a male sperm cell is called _____.

• testes

• fertilization

• sperm

A ____ is a developing organism, from the 8th week until birth.

• embryo

• fetus

• uterus

Menstration usually occurs about _____.

• once a year

• once a month

• once a week

Which of the following happens during puberty?

• Teens get shorter

• Teens start developing characteristics of adults

• Everyone starts at the same time.

Prenatal care is the special care that a mother and baby receive _____ the baby is born.

• before

• after

• during the birth

The physical changes that occur during males during ______ include; acne, facial hair, pubic hair, and a deepened voice.

• infacny

• adulthood

• puberty

Acne, increased perspiration, and increased levels of _________ happen in everyone during puberty.

• hormones

• genes

• cells

During puberty in females, ________ starts.

• their hips get more narrow

• they get shorter

• ovulation