In summer squash, spherical-shaped fruit has been shown to be dominant to elongated fruit. On one
occasion two different spherical varieties were crossed and produced all disk-shaped fruits. When
these hybrid disk-shaped fruits were crossed, they produced 75 disk-shaped fruits, 48 spherical fruits,
and 9 elongated fruits. Explain these results. What will be an ideal response?
9 D__ S__ disk, 3 D__ ss spherical, 3 dd S__ spherical, 1 dd ss elongated; the presence of both
dominant genes produces disk, whereas the presence of either one of the genes as homozygous
recessive produces spherical, and both recessive produces elongated fruit.
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Attributes of Welwitschia mirabilis include
_____ It has only two leaves. _____ It obtains most of its water from seasonal heavy rains. _____ It lives under desert conditions. _____ It is a gnetophyte. _____ Its stems are photosynthetic, but its leaves are not.
Rapid turgor pressure changes in specialized multicellular swellings called ____________ are associated with leaves that move in response to touch or light.
A. petioles B. pulvini C. stipules D. pudicas E. coleoptiles
In what parts of organic compounds is energy stored and available for use?
A.) elemental charges B.) elements C.) chemical bonds D.) molecular weight
A culture medium consisting of agar, peptone, and beef heart, which are substances in which the amount of ingredients are unspecified, is a
a. chemically defined medium. b. complex medium. c. selective medium. d. differential medium. e. reducing medium.