In an annual tree ring, the wood with large
diameter, thin-walled cells is
a. called early wood.
b. heartwood.
c. formed from crushed phloem cells.
d. produced in the winter.
e. called late wood
A
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A differentiated cell ____
a. has only the genes required for that cell type b. is found in the zygote c. is not found after gastrulation d. has all the genes that came from fertilization e. has 23 chromosomes
Which of the following is TRUE about cloning?
a) cloning specifically refers to creation of new individuals with the exact genome as a donor individual b) Hans Spemann successfully cloned the first animal in 1938 c) the only successfully cloned animals have been sheep d) cloning refers to a variety of techniques, ranging from whole organism cloning to tissue and organ cloning e) scientists have successfully cloned a dinosaur from DNA fragments found in preserved fossils
Tumors that are harmful, non-encapsulated growths of cells are known as
A. benign. B. malignant. C. metastasized. D. carcinogenic.
In aquatic vertebrates, which kidney function is critical to helping the organism maintaining homeostasis?
A. The kidneys are relatively small and only require a limited blood supply to maintain their function. B. The kidneys produce a concentrated form of urine that will help decrease the amount of water lost by the organism. C. The kidneys will produce white blood cells that will assist the organism in defense of the body. D. The kidneys have an incredible high rate of tubular reabsorption that allows them to be extremely efficient. E. The kidneys function to maintain the balance between water and several types of salts.