Biology, 07.02.2022 17:20 gmoney1973

Cosmo is a scientist. He is conducting an experiment to determine if microscopic yeast particles are living organisms. He divides a Petri dish into four sections and spreads a sample of yeast into each section. His Petri dish is pictured below.

Cosmo knows that yeast reacts chemically with sugar. So he adds different amounts of sugar to each section of his Petri dish. He is careful to keep each section separated from the others. In one of the sections, Cosmo does not add any sugar at all.

He waits one week and then carefully observes each sample of yeast under a microscope. He makes several observations. These observations are listed below.
Each sample of yeast remained separate from the other three samples.

The three samples that were given sugar showed evidence of a chemical reaction.

The sample that was given the greatest amount of sugar reacted with the sugar the most.

The yeast that received no sugar responded by forming and releasing spores.
Which observation provides the best evidence that Cosmo's yeast particles are living organisms?
A.
Observation #4
B.
Observation #1
C.
Observation #3
D.
Observation #2

Answers: 1

Show answers

Another question on Biology

Biology, 21.06.2019 15:30

The number of living organisms in a particular area is

Answers: 2

Answer

Biology, 22.06.2019 16:10

The lake of the ozarks is a human-made lake, so it collects runoff from coal strip-mining, fertilizers, resort wastewaters, and septic drainages. the average lake temperature is between 10∘c and 21∘c. consider the physical requirements for growth and multiplication that would allow fecal coliforms to “blossom” in the lake of the ozarks. which of the following would accurately describe these organisms? check all that apply. psychrophiles facultative halophiles extremophiles mesophiles hyperthermophiles

Answers: 2

Answer

Biology, 22.06.2019 20:50

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?

Answers: 3

Answer

Biology, 22.06.2019 23:00

*a mastectomy is the surgical removal of one or both breasts, either partially of fully. an oophorectomy is the surgical removal of an ovary or ovaries.analyze a woman’s risk of dying of cancer if she carries a mutated brc1 gene.how do heredity and inheritance relate to the data presented in these charts? what data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries? what does the age at diagnosis tell you about the mutation? explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.

Answers: 3

Answer

You know the right answer?

Cosmo is a scientist. He is conducting an experiment to determine if microscopic yeast particles are...

Questions