Protists that lack mitochondria are
A) amoebas.
B) apicomplexans.
C) euglenozoans.
D) excavates.
E) ciliates.
D
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Inversions are most likely to affect an organism's phenotype
A) if one or both of the inversion's breakpoints lies within the transcribed region of a gene. B) if the inversion's breakpoints are on either side of a gene and its regulatory regions and the entire gene is reversed in the genome. C) if the inversion is pericentric. D) if the inversion is paracentric. E) if the inversion is small.
In this figure, the genotype of the resistant parental bollworms is ___ while the susceptible parental bollworms have a ___ genotype
a. RR; Rr b. Rr; rr c. RR; rr d. Rr; RR e. rr; RR
In some species of sharks, babies hatch from shells within their mother's body. What is this behaviour an example of?
a. oviparity b. viviparity c. ovoviviparity d. budding
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below
Not all words or phrases will be used; each word or phrase should be used only once. The specialized functions of different membranes are largely determined by the __________________ they contain. Membrane lipids are __________________ molecules, composed of a hydrophilic portion and a hydrophobic portion. All cell membranes have the same __________________ structure, with the __________________ of the phospholipids facing into the interior of the membrane and the __________________ on the outside. The most common lipids in most cell membranes are the __________________. The head group of a glycolipid is composed of __________________. amphipathic hydrophobic phosphatidylserine cholesterol lipid bilayer phospholipids fatty acid tails lipid monolayer proteins glycolipids lipids sterols hydrophilic head groups phosphatidylcholine sugars