The transformation of normal cells into cancerous cells is called ____
a. carcinogenesis
b. cancerogenesis
c. transcription
d. retinoblastoma
e. BRCA1 activation
ANSWER: a
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Monkeys, trees, snakes, moss, birds, sunlight, rain, rocks and bugs together would be considered a(n) ____
a. population b. ecosystem c. biosphere d. community e. organism
Sensory signals that trigger release of saliva are an example of how the nervous system works with which other system?
1.endocrine 2.cardiovascular 3.sensory 4.digestive 5.muscular
Cartilaginous fishes differ from lampreys because they
A) have a three-chambered heart. B) are ectotherms. C) lack a skull. D) lack a skeleton. E) have jaws.
Which statement is true about carbohydrates?
A) They consist of simple sugars which contain carbon, hydrogen, and oxygen in a 2: 1: 2 ratio. B) They are usually hydrophobic. C) They are a component of the cell wall of different types of organisms. D) They have primary, secondary, tertiary, and quaternary structure. E) They maybe saturated or unsaturated.