Based on the following graph, what is the most likely relationship between Paramecium and Didinium?
A. Didinium and Paramecium have a mutualistic relationship.
B. Paramecium prey on Didinium.
C. Paramecium have a commensal relationship with Didinium.
D. Didinium prey on Paramecium.
E. Paramecium is a parasite that feeds on Didinium.
Answer: D
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When two adjacent bases in the same strand of DNA dimerize (form a covalent bond between them), what happens to
the DNA?
a. the original strand of DNA now contains a new DNA sequence b. the original strand of DNA is kinked, which prevents DNA polymerase from working properly
c. the original strand of DNA is methylated, which causes the bases to mismatch d. the original strand of DNA is prevented from opening during replication, so this section of DNA will not be replicated e. the original strand of DNA is unaffected, so no additional mutations arise
Which of the following is associated with rough ER?
A) Plasma membrane B) Ribosomes C) Chlorophyll D) DNA E) Lipid synthesis
Most of the homeostatic functions in the body are regulated by positive feedback loops
Indicate whether the statement is true or false
You find colorless areas in cells in a Gram-stained smear. What should you apply next?
A) an acid-fast stain B) a flagella stain C) a capsule stain D) an endospore stain E) a simple stain