Given basic information from observations of the orchid with a long nectary, and the moth with the long proboscis, what is the advantage to a plant like an orchid producing nectar over a plant like a pine tree that does not produce nectar?
A. Nectar provides a sticky surface for pollen to attach to, promoting fertilization.
B. Nectar helps disperse pollen by water.
C. Nectar helps disperse pollen by wind.
D. Nectar provides food for the pollen and growing fruit.
E. Nectar attracts animals that perform pollination.
E. Nectar attracts animals that perform pollination.
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To demonstrate the response of several Daphnia genotypes across a wide range of environments, Luc De Meester (1996 ) measured the change in phototactic behavior of Daphnia sampled from lakes that contained different numbers of predatory fish
The lines drawn between control and fish-induced water are termed ________. [two words] Fill in the blank(s) with correct word
Which of the following parts of a cell is (are) most like the shipping center of a company?
A) the Golgi apparatus B) mitochondria C) chloroplasts D) the nucleolus
How is the cell cycle of Sulfolobus spp. similar to that of eukaryotes?
A. Sulfolobus demonstrates prophase, metaphase, anaphase, and telophase. B. A centrosome is apparent in Sulfolobus during G2. C. The cytokinesis process in Sulfolobus is similar to the process in eukaryotes. D. Sulfolobus has microtubules composed of a tubulin homolog that separate the chromosomes.
A sizable population was analyzed for SNPs in a certain DNA region. Four possible variants were found, with the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0
03 SNP 4: GGTTTAGGA; frequency = 0.03 If the population is in Hardy-Weinberg equilibrium, what is the total frequency of heterozygotes at this SNP locus? A) 0.828 B) 0.009 C) 0.170 D) 0.055 E) 0.0018