Sexual reproduction _____________________.
A. leads to uniform characteristics within a population
B. results in new combinations of genetic traits
C. creates genetic clones
D. requires less tissue differentiation than asexual reproduction
E. produces genetic clones and requires less tissue differentiation than asexual reproduction
Answer: B
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Answer the following statements true (T) or false (F)
1. A magnifying glass could be considered a simple microscope. 2. The total magnification achieved when the oil immersion lens is used is 1,000 ×. 3. Fluorescence microscopy is often used in immunology laboratories. 4. The resolving power of electron microscopes is much better than that of compound light microscopes because the wavelength of electrons is much longer than that of visible light. 5. Primary syphilis is usually diagnosed in the clinical microbiology laboratory by the use of a scanning electron microscope.
How many distinct aminoacyl-tRNA synthetases does each cell make?
A. ~1 B. ~20 C. ~60 D. ~120 E. ~180
If a dihybrid cross is begun with a P1 generation of a true-breeding plant that produces smooth and yellow peas
(smooth and yellow are both dominant traits), crossed with a plant that produces wrinkled green peas (wrinkled and green are both recessive traits), the F1 plants will all be smooth and yellow. a. True b. False
Rising atmospheric concentrations of greenhouse gasses are causing which of the following two phenomena to occur?
A) global warming and global climate change B) pollution and depletion of the ozone layer C) smog and thermal inversion D) global warming and desertification E) heat and nutrient pollution