A tangle of fungal hyphae is generally known as a
A. bud.
B. mycelium.
C. germ tube.
D. spore.
B
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The chorionic villi eventually form the placenta, a disc-shaped structure that ____
a. releases sex hormones at appropriate times throughout pregnancy b. initiates uterine contractions c. binds to the zygote to accelerate organ development d. nourishes the embryo throughout pregnancy e. prevents infection by blocking the passage of microorganisms through the cervix during pregnancy
A researcher is interested in studying gene X, but not gene Y, in Drosophila. What does she need to amplify only gene
X from the Drosophila genome?
a. some prior knowledge of the gene X sequence so appropriate primers can be designed b. a heat-stable restriction endonuclease c. restriction endonucleases that cut gene X but not gene Y d. a cloning vector that has multiple antibiotic resistance genes e. a cloning vector that will ligate to gene X but not to gene Y
Enterobacteriaceae do not produce Oxidase, compared to the Pseudomonads that do produce Oxidase
a. true b. false
Muscles are connected to bones by
A) cartilage. B) ligaments. C) tendons. D) myofibrils.