Of these 4 genotypic classes of offspring, which arose from a parental gamete produced by the F1 females? (Select all that apply.)
In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked alleles. The wild type alleles (sn+ and ct+) are responsible for straight bristles and intact wings, respectively. A female homozygous for sn and ct+ is crossed to a sn+ct male. The F1 flies are interbred. The F2 males are distributed as follows:
A) sn+ ct+
B) sn ct
C) sn+ ct
D) sn ct+
C) sn+ ct, D) sn ct+
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A genus of primarily wind-pollinated plants includes one unusual species that has evolved to be pollinated by insects. Several morphological changes have accompanied this adaptation. The ______________ are more colorful, there is a nectary at the base of the ______________, the ________________ are shorter and produce sticky pollen, and the __________________ are stickier for enhanced pollen capture.
A. petals, stamens, sepals, carpels B. petals, sepals, stamens, carpels C. stamens, carpels, petals, sepals D. petals, sepals, carpels, stamens
The term used to describe bacteria that have a spherical shape is
A. vibrio. B. bacillus. C. coccobacillus. D. coccus.
Briefly explain some of the advantages and disadvantages of living in social groups
What will be an ideal response?
ATP is to the cell as __________ is(are) to the
financial community. a. printed currency b. checks c. credit d. gold reserves e. automated tellers