The extra-embryonic membrane known as the ________ is the source of germ cells that eventually develop into gametes
Fill in the blank(s) with correct word
yolk sac
You might also like to view...
Answer the following statements true (T) or false (F)
1. Arginine vasotocin is found in nonmammalian vertebrates and shares structural and functional properties with antidiuretic hormone and oxytocin. Because of this, it is generally thought that arginine vasotocin was the ancestoral posterior pituitary hormone in vertebrates. 2. Vitamin D is a hormone produced in part by exposure to sunlight. 3. If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide. 4. Juvenile hormone is a critical growth regulatory and maturity hormone in people. 5. A growth-hormone releasing hormone tumor in the brain could lead to stunted growth in children.
The average life expectancy for females in the United States is
a. 80 years. b. 79 years. c. 76 years. d. 74 years. e. 65 years.
Answer the following questions true (T) or false (F)
1. Facilitated diffusion occurs through membrane-bound transport proteins. 2. Facilitated diffusion occurs down a concentration gradient. 3. Active transport moves a substance against the concentration gradient.
Which process directly results in energy being stored in ATP molecules
a. cellular respiration b. cellular reproduction c. diffusion d. digestion