The model organism for the study of plant development is _____

A. Drosophila melanogaster
B. C. elegans
C. Xenopus laevis
D. Arabidopsis thaliana


D

Biology & Microbiology

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Many people at a wedding ceremony represent which level of organization?

A. cell B. organ C. organism D. population E. ecosystem

Biology & Microbiology

Which of the following structures are NOT used by chemical synapses during signal transmission?

a. gap junctions b. ligand-gated receptors c. Ca2+ d. vesicles e. neurotransmitters

Biology & Microbiology

Depression and an overwhelming desire to sleep are associated with

a. diabetes mellitus. b. diabetes insipidus. c. hyperthyroidism. d. seasonal affective disorder. e. a goiter.

Biology & Microbiology

The law of segregation states that

A) when two identical alleles come together, complete dominance occurs in terms of phenotype. B) genes for different traits assort independently of each other during the formation of egg and sperm. C) genes separate from each other during gamete formation so that each sperm and egg receive only one allele from each pair. D) when different alleles for the same trait come together, one allele will be recessive to another. E) different alleles for the same gene occupy unique loci on sister chromatids.

Biology & Microbiology