Biology, 24.12.2019 09:31 galaxychild101
During an experiment, a scientist observed prokaryotes that lived near volcanic vents deep in the ocean. the scientist most likely observed
a) photoautotrophs
b) chemoautotrophs
c) heterotrophs
d) photoheterotrophs
what might people do to prevent the devolopment of more superbugs?
a) they should use antibotics only when nessary
b) they should devolop stronger antibotics and use them often
c) they should use stronger disinfectants
d) they should not get vaccinated
living on land required that plants
a) evolve photosynthetic pigments
b) conserve water
c) exchange gases
d) have cell walls
unlike lytic viruses, lysogenic viruses do not
a) inject their genetic meterial unto the host cell
b) enter the lytic cycle
c) lyse the host cell right away
d) infect host cells
in which of the following environments are green algae not found?
a) salt water
b) fresh water
c) moist areas on land
d) dry areas on land
what structure forms during angiosperm fertilization but does not form during fertillization amoung other types of plants?
a) a haploid egg
b) a diploid zygote
c) a haploid sperm egg
d) a triploid cell
because bryophytes do not have vascular tissue, they
a) obtain all their water from the surrounding air
b) have true roots, stems, and leafs
c) show alternation of generations
d) grow close to the ground
Answers: 1
Biology, 22.06.2019 00:10
Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation
Answers: 1
Biology, 22.06.2019 03:00
To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.
Answers: 1
Biology, 22.06.2019 03:30
Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?
Answers: 1
During an experiment, a scientist observed prokaryotes that lived near volcanic vents deep in the oc...
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