In analyzing data for crosses involving one gene, Mendel discovered that alleles are discrete entities, and that they are separated during formation of gametes. This was the basis of Mendel's law of ________
Fill in the blank with correct word.
Answer: segregation
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Select the choice that correctly associates the organ with its embryonic sources
A) anterior pituitary gland â€" mesoderm and endoderm B) thyroid gland â€" mesoderm and ectoderm C) adrenal gland â€" ectoderm and mesoderm D) skin â€" endoderm and mesoderm E) brain â€" mesoderm and endoderm
Fairy shrimp that are found in deserts tend to have very drought-resistant eggs that can remain
dormant for many months. Which of the following disturbances might have a positive effect on seasonal reproduction in fairy shrimp?
a. fire b. drought c. flooding d. introduction of an invasive predatory fish
Which of the following contains the most nutrients?
A) dryfall B) wetfall in an open prairie C) wetfall on a forest floor D) wetfall in the ocean
Papillary muscles:
A. contract when the ventricles relax B. prevent the valves from closing during ventricular diastole C. are attached to the semi lunar valves via the chordae tendineae D. prevent the backflow of blood into the atria during ventricular systole E. prevent the backflow of blood into the ventricles from the aorta