Dr. Proctor tells Uma that her developing embryo is showing distortions in the development of its circulatory system. As a knowledgeable student of human development, Uma should realize that the problem is within cells of the ____ layer.
a. placenta
b. mesoderm
c. ectoderm
d. endoderm
Question 2
Which statement is true?
a. Estrogen is found only in females, and androgen sare found only in males.
b. Estrogen is found only in males, and androgens are found only in females.
c. During puberty, estrogen and androgens are released at the same levels in adolescent males and females.
d. During puberty, estrogen and androgens are released at different levels in adolescent males and females.
(A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph
Milestones of Gross Motor Development in Infancy Age ranges provided are for 90% of American infant
The dimensions of a typical bolt showing where sizes are measured.
Voltmeter showing the battery voltage when the headlights were on (engine off) for one minute.
Development Indicators
Stages of development in vertebrates.