BIOLOGY HIGH SCHOOL

All cells are surrounded by a cell wall true or false

Answers

Answer 1
Answer: True.
The animal cell, however, does not have a cell membrane.
Answer 2
Answer:

Final answer:

Not all cells are surrounded by a cell wall. Though cell walls are found in plants, fungi, bacteria, and some protists, animal cells lack them. Thus, the statement 'all cells are surrounded by a cell wall' is false.

Explanation:

The statement that 'all cells are surrounded by a cell wall' is false. While it's true that many types of cells do have cell walls, such as those found in plants, fungi, bacteria, and some protists, not all cells do. A prime example of this is animal cells, which lack cell walls. Instead, they are surrounded by a plasma membrane and sometimes an extracellular matrix that provides structural support and signals cellular function.

Cell walls are essential for many cells as they provide a protective layer, giving shape and rigidity, preventing osmotic lysis, and offering support against environmental stresses. The composition of these cell walls can vary greatly, depending on the type of cell. For instance, cell walls can be made of materials like cellulose (in plants and fungi), chitin (in fungi), or various substances in protist and algae cells)

However, even though some cells have cell walls, remember that not all do. So, it's inaccurate to state that every cell has a cell wall surrounding it.

Learn more about Cell Wall here:

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Which of the following are abiotic factors that shape ecosystems?
Group of answer choices

Answers

Temperature, light and water

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:

In which phase will crossing-over occur? A. Meiosis II
B. Metaphase II
C. Mitosis
D. Prophase I

Answers

The correct answer is option D. Prophase I

The crossing over is a phenomena, which occur in the cells undergoing meiosis. In the process of crossing over, the exchange of the genetic material takes place between the sister chromatids. This process takes place in the prophase 1 stage of meiosis 1 in the gametes. The exchange of genetic material between chromatids cause recombination, and hence, genetic variation.

Crossing over occurs in the first stage of meiosis which would be Prophase I.

Isotopes of the same element differ in their ____.number of electrons
number of protons
atomic number
mass number

Answers

Isotopes of the same elements differ in their mass number. Isotopes are those elements have the same protons but differs from their neutrons. That is why it differs in their mass number because the mass number is the sum of protons and neutrons.

Answer:

He is correct

Explanation:

Just took my lesson and got 100% the answer is mass

Photosynthetic organisms like grass are able to ________. Group of answer choices turn light energy from sunlight into sugars use water they take in through their leaves as a final electron acceptor use molecules in the air as a major source of carbon make all of their organic matter from organic molecules in the soil

Answers

use molecules in the air as a major source of carbon .

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b. Graduate
c. Secondary
d. Primary

Answers

It is b graduate.
(Hope this helps)
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