Answer the following questions true (T) or false (F)
1. During cleavage, the vegetal pole of a frog egg contains larger cells than the animal pole.
2. The lenses of the eye are produced from the endoderm.
3. Bicoid mRNAs are produced by the zygote.
1. TRUE
2. FALSE
3. FALSE
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The ____ cells are stimulated by ____ to secrete testosterone
a. Sertoli; LH b. Sertoli; FSH c. Leydig; LH d. Leydig; FSH e. Sertoli and Leydig; LH
The hormone __________ is indicated at “D.”
a. PRL b. LH c. oxytocin d. ADH e. TSH
What actually happens to the blood cells of people with sickle cell anemia that causes the cells to
change their shape ("sickle")? A. Polymerization of hemoglobin molecules into long fibers. B. Destruction of the hemoglobin molecules. C. Loss of hemoglobin through leaky cell membranes. D. Attachment of phosphate groups to the hemoglobin molecules. E. Binding of methyl groups to the heme group of the hemoglobin molecule.
Capturing energy by animals is in effect a process that utilizes ________ and produces ________.
A. ATP; AMP B. nitrogen; H2O C. carbon dioxide; oxygen D. oxygen; carbon dioxide E. N2; carbon