Multiple Choice
The first large forests formed in the Carboniferous period. The decrease in CO2 levels by all of these plants caused __________.
28. Plants
Seedless Vascular Plants
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In the life cycle of a fern, the multicellular male gametangium (the sex organ that produces sperm cells) is called a(n) __________.
A
archegonium
B
frond
C
rhizoid
D
sporangium
E
antheridium
Verified step by step guidance1
Understand the life cycle of a fern, which includes both a sporophyte and a gametophyte stage. The gametophyte stage is where the sex organs develop.
Identify the male gametangium in ferns, which is responsible for producing sperm cells. This structure is known as the antheridium.
Differentiate between the male and female gametangia. The female gametangium is called the archegonium, which produces eggs.
Recognize other parts of the fern: the frond is the leaf-like part, rhizoids are root-like structures, and sporangium is where spores are produced.
Confirm that the multicellular male gametangium in ferns is indeed called an antheridium, as it is the structure that produces sperm cells.
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