Moss Sporophytes Are Typically Green When Young, but Turn Brown

question 9

Multiple Choice

Moss sporophytes are typically green when young, but turn brown when ready to release their spores. This observation would lead you to think that the ________.

• A) sporophyte photosynthesises when young and contributes energy for spore production
• B) sporophyte photosynthesises at all ages-it just uses different wavelengths for photosynthesis at different ages
• C) gametophyte cannot photosynthesise
• D) cuticle rubs off of older sporophytes and exposes the colour that is underneath

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Definitions:

Down Syndrome

An inherited condition in which individuals have abnormalities of the face, eyelids, tongue, and other parts of the body and exhibit physical and intellectual disability; usually results from trisomy of chromosome 21.

Trisomic

A genetic condition characterized by having three copies of a particular chromosome instead of the normal two.

Colchicine

A drug that blocks the division of eukaryotic cells by binding to tubulin subunits, which make up the microtubules, the major component of the mitotic spindle.

Mitotic Metaphase

A stage of mitosis in cell division where chromosomes align in the center of the cell before being separated into each of the two daughter cells.