Which of the following statements is NOT a correct description of an advantage that seeds have over spores?
A. Seeds can remain dormant and survive unfavorable conditions.
B. Seeds are produced in greater numbers than spores.
C. Seeds are tougher and can resist abrasion better than spores.
D. Seeds are more resistant to pathogens.
E. Production of seeds does not require water as a medium for sperm transport.
B. Seeds are produced in greater numbers than spores.
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Agar
A. is a useful nutrient source for most bacteria. B. is a hydrolysate of proteins. C. stays liquid through the typical range of incubation temperatures. D. has chemical and physical properties that make it almost ideal for solidifying media.
Two populations of catfish have lived in separate neighboring lakes for many generations. Population A contains about 30% short whiskered catfish (ww) and 70% long whiskered catfish (WW or Ww); Population B contains about 10% short whiskered catfish and 90% long whiskered catfish. Following a year of record rainfall, both lakes rise enough to allow the catfish populations to swim between the two lakes and interbreed. What will be the effect(s) over time of this interbreeding?
_____ DIfferences in the frequencies of W and w between the two populations will increase. _____ Population A will see an increase in long whiskered fish, but Population B will not see any changes in the prevalence of the two phenotypes. _____ Population A will see an increase in long whiskered fish and Population B will see an increase in short whiskered fish. _____ Population B will see an increase in short whiskered fish, but Population A will not see any changes in the prevalence of the two phenotypes. _____ DIfferences in the frequencies of W and w between the two populations will decrease. _____ Population A and Population B will experience an increase in genetic diversity.
Hemophilia is a genetic clotting disorder.
Answer the following statement true (T) or false (F)
What is the correct order of the steps in the progression of lung cancer in a smoker?1. Cilia are lost2. There is a thickening and callusing of the cells lining the bronchi3. Metastasis occurs4. A tumor forms5. Cells with atypical nuclei appear
A. 5, 1, 2, 3, 4 B. 2, 1, 4, 5, 3 C. 1, 2, 4, 3, 5 D. 1, 2, 3, 4, 5 E. 2, 1, 5, 4, 3