Nellie has just discovered that she is pregnant. She is a smoker and knows she should quit because nicotine is especially harmful to the fetus during the ____ stage of development and leads to ____.
a. embryonic; low birth weight
b. embryonic; intellectual disability
c. fetal; loss of limbs
d. fetal; brain damage
Question 2
Margarite is going to have a baby. Dr. Cortez tells her that there is a critical period in which her baby's organs and limbs must grow or else they never will. Which stage of prenatal development is Dr. Cortez describing?
a. Zygote
b. Embryonic
c. Fetal
d. Gestational
Barbara McClintock, who discovered transposable elements.
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Fossils are formed after an animal dies, decomposes, and is covered in sediment. Minerals in ground
The recently discovered lleret calvaria from Kenya is the smallest H. erectus and shares many traits
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Location of the island of Tristan da Cuhna, first discovered by a Portuguese admiral in 1506.