Which observation proves that a cell is a eukaryote?A. The cell has a cell membrane.
B. The cell contains a nucleus.
C. The cell uses ribosomes to create protein.
D. The cell contains DNA

Answers

Answer 1

Answer: The answer is B. If a cell has a nucleus its a eukaryote

Answer 2

Answer:

Final answer:

The crucial feature that proves a cell is eukaryotic is the presence of a nucleus, as this is the fundamental characteristic that differentiates eukaryotic cells from prokaryotic ones.

Explanation:

In biology, the quintessential feature that distinguishes eukaryotic cells from prokaryotic cells is the presence of a nucleus. So, we can conclude that the observation which proves that a cell is a eukaryote is B. The cell contains a nucleus. Eukaryotic cells are equipped with a true nucleus, which houses the cell's DNA. Other features such as a cell membrane, ribosomes, or the existence of DNA could be attributed to both eukaryotic and prokaryotic cells, hence they are not unique identifiers for eukaryotes.

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Is it true that all cells are surrounded by a cell wall
The air in the stratosphere is less dense and more______then in the troposphere
Rachel Carson can be credited for _______a. the modern environmental movement, slowing the extinction rate of hibernating mammals, and writing laws to protect the environment b. bringing attention to the unchecked use of pesticides, pesticides’ harmful effects on the environment, and writing laws to protect the environment c. bringing attention to pesticides’ harmful effects on the environment, the modern environmental movement, and slowing the extinction rate of hibernating mammals d. bringing attention to the unchecked use of pesticides, brining attention to pesticides’ harmful effects on the environment, and the modern environmental movement
People with diabetes often receive insulin injections. What effect does insulin have on the body

A part of a(n) _______ organism can become diseased, the part can be removed, and the organism can continue to live.

Answers

A part of a multicellular organism can become diseased, the part can be removed, and the organism can continue to live. This is due to the fact that within a multicellular organism, parts of the body are independent of one another and do not rely on each other for survival.

Answer:

The correct answer is Multicellular

Explanation:

This involves replacing faulty genes with normal working genes in order to provide a “cure” for a genetic disorder:a. DNA fingerprinting
c. Human Genome Project
b. gene therapy
d. allele testing

Answers

B) Gene therapy involves replacing faulty genes with normal working genes in order to provide a cure for a genetic disorder.

Recent advances in technology have made vegetarian meals far cheaper to produce. Assuming that vegetarian meals and beef aresubstitutes, what would be the expected change in the demand for beef, ceteris paribus? (1 point)
It is impossible to tell from the information provided.
The demand for beef would increase.
The demand for beef would decrease.
The demand for beef would be unaffected.
Check Answer

Answers

The demand for beef would be unaffected be the expected change in the demand for beef, ceteris paribus. The correct option is C.

Thus, Consumers might be more likely to pick vegetarian options over beef due to cost considerations.

As a result of recent technological advancements that have made vegetarian meals more affordable to manufacture.

All else being equal (ceteris paribus), this shift in consumer preferences brought on by the relative affordability of vegetarian meals is expected to lead to a decline in the demand for beef.

Thus, The demand for beef would be unaffected be the expected change in the demand for beef, ceteris paribus. The correct option is C.

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Answer:

C. The demand for beef would decrease.

Explanation:

Where does the subtrate bind to the enzyme

Answers

The substrate will bind to the active site of an enzyme

Scientists predict that we will eventually use up all available fossil fuels. Which list includes only fossil fuels? a. wood, natural gas, and coal
b .natural gas, coal, and oil
c .wood, natural gas, and solar
d. coal, oil, and solar

Answers

Answer:

B: natural gas, coal, and oil

Explanation:

All fossil fuels are carbonated substances formed from organic matter comming from plants, microorganisms, and algae. This organic matter have been accumulating for millions of years in the bottom of seas or lakes and buried, fossilizeing. This fossilized matter is what gives origen to fossil fuels. They have an important, although not quietly considered, characteristic: They are non-renewable resources.

Coal is a fossil fuel that highly contributes to climatic change, polluting not only air but also water and the soil. By burning it, its gases contribute to increase the greenhouse effect and consequently producing global heat. This is affecting all forms of life that depend on these resources, including human beings. During the coal combustion process, several particles are released to air, polluting and being the cause of smog and acid rain. In spite of its reduced use in the last years, coal is still the principal fuel used by thermal, refineries, chemical, and still work industries.

Oil is also a huge contaminator and it generates a dangerous waste that is very harmful to the environment. Its elimination by incineration or split provokes huge pollution problems in the air, water, and ground. In water, it produces an impermeable film that impedes gas exchange and causes suffocation in the living forms that inhabit there. But if the oil is burned it generates nocive gases that are very toxic because of their content in plumb, chloride, phosphorus, sulfur, among others.

Natural gas is a hydrocarbure composed mostly of methane and other light hydrocarbures. As it is ussually found in deep underground depossits, the origen of natural gas is associated with petrolium, and hence they share many similar energetic properties.

Answer:

natural gas, coal, and oil

Explanation:

Select all that apply. How does mitosis in animal cells differ from mitosis in higher plant cells? Plant cells maintain chromosomal integrity throughout the process. Plant cells divide by means of a cell plate. Animal cells undergo furrowing. Animal cells produce four daughter cells.

Answers

The answers are:
- Plant cells divide by means of a cell plate.
- Animal cells undergo furrowing.

The main difference between mitosis in animal cells and mitosis in higher plant cells is in cytokinesis. In animal cells, membrane forms around each set of chromosomes on two opposite sides of the cells and cells divide into two identical daughter cells. Animal cells undergo furrowing.
In plants cells, however, the cell walls prevent complete separation of the cells so cells must divide by means of a cell plate.

Final answer:

Mitosis in animal and plant cells end differently; with furrowing in animal cells and the formation of a cell plate in plant cells. Plant cells also maintain chromosomal integrity throughout the process.

Explanation:

Mitosis in animal cells and plant cells have a different conclusion. In animal cells, cytokinesis occurs through a process called furrowing, where the cytoplasm is pinched into two. On the other hand, plant cells undergo cytokinesis through the formation of a cell plate which eventually develops into a cell wall separating the two daughter cells. Also, unlike animal cells, plant cells maintain chromosomal integrity throughout the process.