Biology, 04.04.2021 04:20, Hunter1471
1. We have evidence to support the claim that the trait of antibiotic resistance has increased in many species of bacteria since penicillin became the first commercially available antibiotic in the 1940's. Bacteria reproduce by binary fission, a form of asexual reproduction (meaning one cell reproduces identical copies of itself). All bacterial populations have
the potential to undergo changes in traits; creating populations of bacteria that have a large variation in traits. Identify TWO processes that contribute to variation of traits in an actively reproducing population of bacteria.
2. Like bacteria(prokaryotes), eukaryotic organisms can develop mutations in DNA that can affect traits, but these mutations are rare. Unlike bacteria, most multicellular organisms reproduce sexually- that is, two parents each produce cells called gametes that contain 1/2 the DNA needed for an
organism. When gametes from two separate parent organisms fuse to form a single cell (zygote), that will develop into a juvenile, that is not identical to its parents. Identify THREE events in the process of creating gametes and forming a zygote that result in this natural variation.
Answers: 1
Biology, 21.06.2019 21:20, zay65307
Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.
Answers: 3
Biology, 22.06.2019 03:00, LaneyMM1401
Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.
Answers: 2
Biology, 22.06.2019 09:00, 001234567891011
Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm
Answers: 1
Biology, 22.06.2019 10:00, alexwlodko
Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.
Answers: 1
1. We have evidence to support the claim that the trait of antibiotic resistance has increased in ma...
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