Small animals, such as water striders and water spiders, can run across a pond's surface due to ________
Fill in the blank(s) with correct word
surface tension
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Classic experiments suggested that a floral stimulus, florigen, could move across a graft from an induced plant to a noninduced plant and trigger flowering
Recent evidence using Arabidopsis has recently shown that florigen is probably _____. A) a phytochrome molecule that is activated by red light B) a protein that is synthesized in leaves, travels to the shoot apical meristems, and initiates flowering C) a membrane signal that travels through the symplast from leaves to buds D) a second messenger that induces Ca++ ions to change membrane potential E) a transcription factor that controls the activation of florigen-specific genes
An axillary bud
(a) is found along internodes. (b) produces new roots. (c) is the structure from which branches and flowers arise. (d) is the same as a terminal bud.
Ancestral character states were present in the ancestor of a clade
1.True 2.False
Scottish scientist cloned Dolly from another sheep in 1997. They took an egg cell from a sheep (Mom 1) and removed and discarded the nucleus. They took an udder cell nucleus, that was diploid, from a different sheep (Mom 2). They inserted the nucleus into the egg cell and made this new cell undergo mitosis. They implanted the dividing cell into a surrogate mother (MOM 3). Several months later, Dolly was born. Dolly was actually a clone of which sheep?
a) Mom 1 b) Mom 2 c) Mom 3 d) there is not enough information given to answer this question