20. Development

Which of the following events typically occurs during the second trimester of human fetal development?

During which stage of pregnancy are all major organs formed in a developing human embryo?

People with Kartagener's syndrome suffer from a variety of ailments, including the intriguing condition known as situs inversus, a reversal of the abdominal and thoracic organs. This condition occurs because of __________.

In mammals, the __________ facilitates implantation in the uterine wall.

Up to the eight-cell stage, the blastomeres of a mouse embryo can each form a complete embryo if isolated. This indicates that __________.

In animal development, which of the following processes results in the formation of the three primary germ layers?

As an animal develops, organs form and the body transforms into a shape typical of the species in a process called __________.

Which of the following processes occurs in animal development but not in plant development?

During cleavage the single large zygote is converted into a __________.