Match the description with the type of spore.
A. Ascospores
B. Basidiospores
C. Arthroconidia
D. Blastospores
A. Sexually-produced spores protected within a sac-like structure
B. Sexually-produced spores, produced within a club-shaped structure
C. Asexually-produced spore produced by the fragmentation of hyphae
D. Asexual spore formed by a budding process
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Species that usually colonize empty habitats are more likely to show traits that are favored by _____
a. r-selection b. K-selection
In a receptor tyrosine kinase, formation of the dimer is initiated by
1.two receptor molecules each binding a signal molecule. 2.binding of phosphates to tyrosines on the cytoplasmic segment of the receptors. 3.activation of the protein kinase sites on the receptor. 4.receptor autophosphorylation. 5.activation of cellular proteins.
Which is a true statement regarding the size of PCR products?
A. Since the length of primers increases with each cycle, when PCR is completed, the majority of products are of various sizes. B. Since the number of DNA products ending exactly between both primers increases with each cycle, when PCR is completed, the majority of products are of similar size. C. Since the number of DNA products extends beyond each primer with each cycle, when PCR is completed, the majority of products are of various sizes. D. None of the choices are correct.
Choose the phrase that best completes this sentence: Microtubules ____________ and are required to pull duplicated chromosomes to opposite poles of dividing cells
(a) generate contractile forces (b) are intermediate in thickness (c) can rapidly reorganize (d) are found in especially large numbers in muscle cells