Neoplasms are described as malignant when _____.
A) they produce the pigment melanin and significantly darken the area of the tumor
B) they remain confined or encapsulated within a well-defined region
C) they stimulate growth of blood vessels directly into the tumor
D) they can be eradicated only by surgery, chemotherapy, or radiation
E) tumor cells break away from the primary tumor and establish secondary colonies
Answer: E) tumor cells break away from the primary tumor and establish secondary colonies
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In Drosophila melanogaster, polytene chromosomes are produced when
A) a chromosome breaks and rejoins with another section of the same chromosome. B) a cell divides several times before the chromosomes are duplicated. C) chromosomes are duplicated repeatedly without a corresponding nuclear division. D) a segment of a chromosome is duplicated during an unequal crossing-over event. E) characteristic banding patterns form on the chromosomes.
The nutritive tissue in a mature pine seed is triploid
____________________ Indicate whether the statement is true or false.
In the accompanying figure, the palisade mesophyll is labeled with the number
:
a. 1
b. 2
c. 3
d. 6
e. 9
T or F: The two types of osteoblasts are osteocytes and osteoclasts
What will be an ideal response?