What occurs during Prophase II?
What will be an ideal response?
- chromosomes
- Chromosomes become visible
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The chemical composition of the gases surrounding the Earth has changed substantially over the past 4 billion years. One notable change was due to the emergence of photosynthetic organisms. The process of photosynthesis increased the amount of what gas in the atmosphere?
A. Carbon dioxide (CO2). B. Nitrogen (N2). C. Hydrogen sulfide (H2SO4). D. Oxygen (O2). E. Water vapor (H2O).
Which of the following is NOT an example of sensory adaptation?
a. a loss of the sense of pressure of clothes against the skin b. adjustment to repeated jumping into a body of cold water c. response to lack of oxygen at high altitudes d. eventual loss of awareness of a constant noise e. the loss of the ability to smell a person's perfume or cologne after being in that person's presence for some time
Which of the following pairs is mismatched?
A) Neisseria meningitidis — produces deadly endotoxins B) Haemophilus influenzae — virulence due to capsule C) Mycobacterium leprae — cultured in armadillos D) Cryptococcus neoformans — acid-fast rod E) Naegleria fowleri — causes amoebic encephalitis
Which is NOT a class of antibiotic resistance mechanism?
a. modification of the drug target b. removal from the cell via efflux pump c. disruption of membrane structure d. enzymatic inactivation