Lactic acid, an end product of fructose fermentation, causes breakdown of tooth enamel and, eventually, cavities
Indicate whether the statement is true or false
TRUE
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A bacterial cell that contains an outer membrane and periplasmic space stains pink to red on Gram stain. Which one of the following statements explains this discrepancy?
a. The bacteria were subjected to too much alcohol during the decolorization process, causing the organism to absorb the pink-to-red dye. b. The bacteria with an outer membrane and periplasmic space should not be Gram stained because of their cell wall content. c. Something is wrong with the lot of stains and may be expired. The Gram stain rea-gents are most likely expired. d. No discrepancy is present; organisms that contain an outer membrane and periplas-mic space should stain pink because of their cell wall composition.
Answer the following statements true (T) or false (F)
1. In red-winged blackbirds, females tend to choose males with the most desirable territories and males compete with each other for territories. Redwing blackbirds demonstrate both intersexual selection and intrasexual selection. 2. Cryptic female choice is a type of intrasexual selection. 3. A population undergoing microevolution would show Hardy-Weinberg disequilibrium. 4. The Mexican axolotl (Ambystoma mexicanum) is an amphibian that has a derived mode of development characterized by metamorphic failure. This mode of development results in an entirely aquatic life cycle and is an example of paedomorphosis.
The results of the experiment represented in the accompanying figure and similar experiments include the formation of all of the following except:
a. sugars.
b. lipids.
c. ATP.
d. amino acids.
e. oxygen
All chordates have pharyngeal gill slits at some point during their development
Indicate whether the statement is true or false