DNA ________ accounts for the ability of chromosomes to undergo synapsis
Fill in the blank with correct word.
Answer: homology
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Answer the following statements true (T) or false (F)
1. You could observe saltatory conduction in a crayfish. 2. The exposed, unmyelinated gaps between glia on myelinated axons are also sites of voltage-gated Na+ channels. 3. Electrical synapses transmit signals using neurotransmitters. 4. A given neurotransmitter can produce either excitatory or inhibitory effects on postsynaptic neurons depending on the specific receptor type it binds.
Which statement about abiotic factors in aquatic biomes is true?
a. Movement affects the availability of nutrients in both rivers and oceans. b. The numerous photosynthetic organisms in abyssal zones require sunlight. c. Chemosynthetic bacteria are found primarily in brackish water. d. Dissolved solids are found in oceans but not rivers.
Lysosomes are membrane-bound vesicles that arise from what structure?
What will be an ideal response?
What differentiates virulent strains of Streptococcus pneumoniae from nonvirulent strains?
A) the species-specific teichoic acid present in its cell wall B) the type of Lancefield antigen it produces C) the presence of a polysaccharide capsule D) the type of toxins it produces E) the extent of the hemolytic zone it produces when it is grown on blood agar