________ reproduction, in contrast, generates genetically unique offspring. To accomplish this, an organism must produce _____, sperm and egg, through the process of _______. The cells produced this way will be _______, meaning that they contain a single set of chromosomes. Such cells are produced only in the ______.
Fill in the blank(s) with the appropriate word(s).
Sexual...gametes...meiosis...haploid..gonads
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Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that _____
A) arthropods evolved before vertebrates did B) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates C) ancestral arthropods must have been poorly adapted to aquatic life, and thus experienced a selective pressure to invade land D) vertebrates evolved from arthropods E) arthropods have had more time to coevolve with land plants than have vertebrates
Nutritive tissue within angiosperm seeds.
Choose the LETTER of the best match: A. hypocotyl B. endosperm C. scutellum D. radicle E. epicotyl
What fraction of the time will the cross of Aa Bb Cc with Aa Bb Cc produce an offspring that
expresses all three dominant genes? a. 3/64 b. 1/16 c. 1/8 d. 9/64 e. 27/64
One feature of "engineered" plasmids that is helpful in the isolation and analysis of cloned DNA is:
a. they can only handle DNA fragments of up to 10 kb. b. that they are an integral part of all eukaryotic cells. c. they contain no genetic material of their own so that the cloned fragment is truly isolated. d. the presence of genes that allow transformed cells to survive on different media. e. the base sequence of one strand reads the same asits complement