BIOLOGY HIGH SCHOOL

A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts. What type of cell is the student most likely viewing?

Choose 1 answer:

(Choice A) Plant cell

(Choice B) Fungal cell

(Choice C) Bacteria

(Choice D) Animal cell

Answers

Answer 1
Answer:

A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts,it was a Plant cell .

What is a Plant cell?

  • A student is viewing a cell under a microscope. She determines that it has a nucleus, a cell membrane, a cell wall, and chloroplasts,it was a
  • Plant cell
  • .
  • What is a Plant cell?
  • Plant cells can harness the energy of the Sun, store it in the chemical bonds of sugar and later use this energy. The organelle which is responsible for this is the chloroplast. Chloroplasts contain chlorophyll, the green pigment that gives leaves their colour and absorbs light energy.
  • Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection.

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Answer 2
Answer:

Answer:

The student is most likely viewing a (A) plant cell

Explanation:

All cells have a nucleus, but only green plants contain chloroplasts.

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The use of genetically altered livestock, such as cows, goats, pigs, and chickens, to produce medically useful products is referred to as _________.

Answers

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Can anybody help me, i have to write a whole page on endangered species

Answers

Write an essay on Siberian tiger

Why is homeostasis important for survival

Answers

Homeostasis is maintaining an equilibrium or balance. Human bodies only function under very specific conditions, so it is important to maintain them through homeostasis. Otherwise, the proper conditions to function will be missing and we won't be able to function at all.

Distinguish between gradualism and punctuated equilibrium.

Answers

For gradualism changes in species is slow an gradual, occurring in small period changes in the gene pool, whereas for punctuated equilibrium, evolution occurs in spurts of relatively rapid change with long periods of non- change.

Final answer:

Gradualism and punctuated equilibrium are evolutionary theories. Gradualism suggests a slow, constant pace of evolution, whereas punctuated equilibrium involves rapid speciation events after periods of stability.

Explanation:

The theory of gradualism posits that evolution proceeds gradually, with slow and continuous changes taking place over long periods of time. Species progressively mutate and adapt, leading to gradual phenotypic and genetic changes, eventually resulting in some new species over millions of years.

On the other hand, punctuated equilibrium proposes that species experience long periods of stability (equilibrium), punctuated by short, rapid events of speciation. These dramatic events involve a small segment of the population evolving quickly while the rest of the population remains unchanged, leading to a new species.

In summary, gradualism presents a slow, steady pace of evolution, while punctuated equilibrium supports the theory of sudden evolutionary jumps interspersed with periods of little to no evolutionary change.

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Assume that you transform bacteria with a plasmid containing an ampicillin-resistance gene. Instead of directly plating the transformed population as you did in this lab, you set up two liquid cultures of them, one that contains ampicillin and one that does not. You will then assay these cultures on plates at two different times: immediately after you set up the cultures, and then again after the bacteria have been in culture for an extended period. The assays will demonstrate the number of ampicillin-resistant vs. ampicillin-sensitive culture bacteria in each culture at each time. To perform each of the two assays, you prepare serial dilutions of the two cultures and plate them onto LB plates with and without ampicillin (the dilution) is simply to ensure that you will get some plates on which you can distinguish separate colonies).Describe what you expect to observe in the initial assay and in the second assay. What, if any, differences might you expect in terms of the ratios of ampicillin-resistant and nonresistant bacteria?

Answers

In the initial assay with ampicillin, there will still be, although in a smaller number, nonresistant bacteria that have survived incubation. After an extended period, ampicillin will kill all nonresistant bacteria and in the second assay, only ampicillin-resistant bacteria will survive.

Corn smut is a fungus that grows in the ears of corn and changes corn kernels into black, powdery balls of fungus tissue. What would you hypothesize is the significance of the relationship between corn smut and corn?

Answers

Answer:

Pathogenic fungus Ustilago maydis causing a plant disease which is known as corn smut (smuts on maize). This fungus grows in the ears of corn and changes corn kernels into black, and all above parts of the corn.

Corn smut showing a parasitic relationship with corn so, that it is using the corn as a way to spread spores, and causing pathogenic fungus disease.

Answer:

Pathogenic fungus Ustilago maydis causing a plant disease which is known as corn smut (smuts on maize). This fungus grows in the ears of corn and changes corn kernels into black, and all above parts of the corn.

Corn smut showing a parasitic relationship with corn so, that it is using the corn as a way to spread spores, and causing pathogenic fungus disease.

Explanation:
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