In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a _____
A) moss sporophyte
B) moss gametophyte bearing both male and female gametangia
C) fern sporophyte
D) hermaphroditic fern gametophyte
E) fern gametophyte bearing only antheridia
Answer: E
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In a(n) ____ translocation, two nonhomologous chromosomes exchange parts and no genetic information is gained or lost from the cell in the exchange
a. cri du chat b. XXY c. copy number d. Robertsonian e. reciprocal
Which of the following is an application of immunofluorescence microscopy?
A) Visualization of the natural fluorescence of a specimen under UV light. B) Identification of specific components of the immune system. C) Identifying which organelle or cellular compartment contains a particular protein. D) Visualization of the surface structures of a specimen. E) Construction of three-dimensional images of structures smaller than 10 nm.
A human gene is composed of numerous fragments of protein-encoding information known as ________.
A. DNA B. exons C. introns D. mRNA
Which component of the lower respiratory tract is incorrectly matched with a function or description?
A) alveoli: site of gas exchange B) lungs: contain the alveolar sacs C) bronchi: direct air to the lungs D) bronchioles: have ciliated mucous membranes E) larynx: contains the mucociliary escalator