An early marine biology expedition to study Antarctic whales was led by:
a. Sir Alistair Hardy.
b. Alexander Agassiz.
c. Fridtjof Nanson.
d. Charles Wyville Thomson.
e. Louis Agassiz.
A
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What is the difference between a ribonucleotide and a deoxyribonucleotide?
A) Ribonucleotides contain a phosphate group. B) Ribonucleotides have a hydroxyl group on the 2 carbon of their sugar subunit. C) Ribonucleotides contain a sugar with five carbon atoms. D) Ribonucleotides have a hydrogen atom on the 1 carbon of their sugar subunit.
Holding media, such as Stuart's medium and Amie's transport medium, are used to:
a. maintain the viability of microorganisms present in a specimen. b. support the growth and multiplication of any pathogenic organisms that are present. c. prevent clotting of specimens such as blood, bone marrow, and synovial fluid. d. allow pathogenic organisms to grow while nonpathogenic organisms die.
What is the final electron acceptor in the electron transport chain?
a. ubiquinone b. the Q molecule c. oxygen d. cytochrome c
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids?
A) to reflect more energy B) to absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot C) to give them different colors D) because plants cannot make enough chlorophyll a for all of their energy needs