____ join roots to leaves and may be above or underground
a. Vines
b. Stems
c. Petioles
d. Flowers
e. Runners
b
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Plants, animals, and fungi are complex multicellular organisms we encounter all the time. In which order did these groups of organisms likely appear on the planet?
A. animals, then land plants, then fungi B. fungi, then land plants, then animals C. fungi, then animals, then land plants D. land plants, then animals, then fungi E. land plants, then fungi, then animals
Many non-LTR (target primed) retrotransposons encode a reverse transcriptase that has an endonuclease activity. What is the primary function of the endonuclease activity?
A. Its primary function is to cleave the 3' end of the transposon and initiate transposition. B. Its primary function is to cleave the 5' end of the transposon and initiate transposition. C. After the RNA intermediate is converted to a double-stranded DNA, the endonuclease cleaves the target site. D. The endonuclease cleaves a phosphodiester bond in the target site, exposing the primer terminus that is required to prime reverse transcription of the RNA intermediate. E. None of choices given describes the function of the endonuclease activity.
In Drosophila, the sex of a fly with the karyotype XO:2A is ________
Fill in the blank(s) with correct word
The phase of mitosis during which the mitotic spindle begins to form is
A) interphase. B) prophase. C) metaphase. D) anaphase.