Question
Ferns, horsetails and lycophytes belong to which of the
following groups?Solution
Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes. However, they do not form a monophyletic group because ferns (and horsetails) are more closely related to seed plants than to lycophytes.
60   61    57   66    ?      75    39
...15   8   9   15   32    ?    250.5
What will come in place of the question mark (?) in the following series?
4000, ?, 320, 192, 153.6, 153.6
- What will come in place of the question mark (?) in the following series?
121, 115, 102, 82, 55, ? 10Â Â Â 11Â Â Â Â 12Â Â Â Â 20Â Â Â Â 24Â Â Â Â ?
23Â Â Â Â 40Â Â Â Â Â Â 67 Â Â Â Â Â Â 104Â Â Â Â Â Â ? Â Â Â Â Â Â 208
...64, 65, 73, 100, ?, 289
12, 19, 33, ?, 117
312, 302, 282, ?, 212, 162
252, 235, 220, 207, 196, ?
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