All cells are surrounded by a cell wall true or false

QUESTION POSTED AT 06/12/2019 - 03:08 PM

Answered by admin AT 06/12/2019 - 03:08 PM

False. Animal cells has a cell membrane while a plant cell has a cell wall.
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Related questions

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope?

The statement best that explains why cells were observed in more detail using compound microscope than a simple microscope is : compound microscope has greater magnification ability than the simple microscope .

This will allow us to observe the subject with a much smaller size, making it easier for us to observe the detail

hope this helps

ANSWERED AT 18/01/2020 - 01:10 PM


QUESTION POSTED AT 18/01/2020 - 01:10 PM

Sharp, jagged peaks are characteristic of fault-blocked mountains. A. True B. False

true hope this helps! :)

ANSWERED AT 18/01/2020 - 01:08 PM


QUESTION POSTED AT 18/01/2020 - 01:08 PM

Why is meiosis important for organisms? It allows for genetic variation among organisms. It determines which genes are dominant and which are recessive. It produces genetically identical cells. It provides a means of asexual reproduction.

Genetic variation. Meiosis is the combination of 2 haploid cells so it's not asexual reproduction. Meiosis doesn't produce identical cells-mitosis does. And it doesn't determine which genes are dominant or recessive - there are equal chance of inheriting dominant/recessive genes, but the dominant one is expressed as phenotype

ANSWERED AT 18/01/2020 - 01:06 PM


QUESTION POSTED AT 18/01/2020 - 01:06 PM

Which is the main reason cells are replaced in the body?The cells are too large.The cells are inactive.The cells are damaged.The cells are cancerous.

The cells are replaced because the cells are old, dead, or damaged.

ANSWERED AT 18/01/2020 - 01:00 PM


QUESTION POSTED AT 18/01/2020 - 01:00 PM

Which is the end result of cytokinesis? one cell that has two identical copies of DNA one cell that has two different copies of DNA two cells that have two identical copies of DNA two cells that have two different copies of DNA

The end result of cytokinesis is TWO CELLS THAT HAVE TWO IDENTICAL COPIES OF DNA.

Cytokinesis refers to the last stage of either the mitosis or the meiosis. It involves the cytoplasmic division, which brings about the separation of the two daughter cells that are formed. It is a physical process, which finally divide the cells into two and at the same time ensuring that each cell has its own nucleus. At the end of cytokiness, two cells are formed that possess identical copies of DNA.

ANSWERED AT 18/01/2020 - 01:00 PM


QUESTION POSTED AT 18/01/2020 - 01:00 PM

Which of the following statements about agricultural societies is true? a. Agricultural societies did not pollute the environment. b. Agricultural societies impacted the environment less than hunter-gatherer societies. c. Agricultural societies had a higher population than hunter-gatherer societies. d. Agricultural societies impacted the environment more than industrial societies.

The correct answer is option C. Agricultural societies had a higher population than hunter-gatherer societies.

The hunting is not a very popular profession now-a-days, but the agriculture is very common and there are many people, who are involved in the profession of the agricultural production. So, the agricultural societies have a much higher population as compared to the that of the hunter-gather societies. Also, the hunting is banned for many animals and cannot produce enough money to support the basic livelihood.

ANSWERED AT 18/01/2020 - 12:58 PM


QUESTION POSTED AT 18/01/2020 - 12:58 PM

Which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?

The group of organisms that has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom is the animalia kingdom. They present all of the mentioned characteristics.


An example of a pseudocoelom is the roundworm.


I hope it helps, Regards.

ANSWERED AT 18/01/2020 - 12:57 PM


QUESTION POSTED AT 18/01/2020 - 12:57 PM

Which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?

The correct answer is Nematodes, also known as roundworms. They fit the description that you provided.

ANSWERED AT 18/01/2020 - 12:56 PM


QUESTION POSTED AT 18/01/2020 - 12:56 PM

Which statement about enzymes is true

Answer:

Explanation:

Enzymes don't take part in a reaction but just speeds up a reaction

ANSWERED AT 18/01/2020 - 12:51 PM


QUESTION POSTED AT 18/01/2020 - 12:51 PM

What is the end result of meiosis? four identical daughter cells four different daughter cells two identical daughter cells two different daughter cells

Answer;

Four identical daughter cells

Explanation;

-Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.

-In Meiosis one diploid cell produces 4 haploid daughter cells i.e. having half the chromosome number than the somatic cell of same organism. Therefore, as a human cell has 46 chromosomes, each haploid cell gets 23 chromosomes.

ANSWERED AT 18/01/2020 - 12:46 PM


QUESTION POSTED AT 18/01/2020 - 12:46 PM

Ron is observing an onion cell on a slide under a microscope. He sees chromatids being pulled to opposite ends of the cell. Which phase is he seeing?

The answer is anaphase.


Ron is obviously observing cell division - mitosis. Mitosis consists of four phases - prophase, metaphase, anaphase, telophase and cytokinesis.

1. Prophase: Chromatin in the nucleus condenses and chromosomes pair up

2. Metaphase: Chromosomes line up at the center of the cell. The sister chromatids are joined together.

3. Anaphase: The sister chromatids separate from each other to the opposite sides of the cells.

4. Telophase and Cytokinesis: Membrane forms around each set of chromosomes on two opposite sides of the cells and cell divides into two identical daughter cells.

 

Therefore, sister chromatids being are pulled to the opposite ends of the cell in anaphase.

ANSWERED AT 18/01/2020 - 12:42 PM


QUESTION POSTED AT 18/01/2020 - 12:42 PM

Is diffusion the only way materials can enter the cell? Explain.

Of course not! There's lots of ways materials can enter. It also depends on the cell; whether it has cell wall and cell membrane or only cell membrane.

Besides diffusion, there's also osmosis and active transport.

If the cell has only cell membrane, it means it's partially permeable, which means osmosis can happen.

*hope this helps :)

ANSWERED AT 18/01/2020 - 12:41 PM


QUESTION POSTED AT 18/01/2020 - 12:41 PM

The three stages of cellular respiration are glycolysis Krebs cycle and the electron transport chain when do cells exhibit all these stages

They exhibit all the stages when its the presence of oxygen only.

ANSWERED AT 18/01/2020 - 12:41 PM


QUESTION POSTED AT 18/01/2020 - 12:41 PM

Looking through a microscope, you see a cell forming a cell plate during cytokinesis. Which cell are you looking at?

If a cell plate is seen being formed, then that would mean that a cell wall would be in the process of forming thus you would be looking at a PLANT CELL.

ANSWERED AT 18/01/2020 - 12:41 PM


QUESTION POSTED AT 18/01/2020 - 12:41 PM

A land-dwelling organism, A, and an aquatic single-celled organism, B, are represented below.

Using the image that represents the land-dwelling organism and an aquatic single celled organism. The statement that best explains how A and B are able to survive in their environments is…


Answer: A) The organelles in B perform similar functions to the organ systems in A.


Please see image attached to better understand how we arrived to the conclusion.


I hope it helps, Regards. 

ANSWERED AT 18/01/2020 - 12:35 PM


QUESTION POSTED AT 18/01/2020 - 12:35 PM

Which of the following is not true about Polar bears?a. They all hibernate.b. They have black skin that helps them absorb heat.c. Their fur is transparent and hollow and helps trap heat.d. They have oversized paws with rough pads that help them walk on snow and ice.

a., They all hibernate is false. Polar bears do not hibernate at all. They are active all year long (except for the females that are pregnant). They do not need to hibernate as they are able to live off of fat stores for several months at a time.

ANSWERED AT 18/01/2020 - 12:35 PM


QUESTION POSTED AT 18/01/2020 - 12:35 PM

Which of the following is not true about Polar bears?

After doing an investigation of polar bears. The statement from the options presented below the one that is NOT TRUE is that all polar bears hibernate. They remain active throughout the year.


Answer: A) They all hibernate.


I hope this helps, Regards.

ANSWERED AT 18/01/2020 - 12:34 PM


QUESTION POSTED AT 18/01/2020 - 12:34 PM

Name two things found in a plant cell that are not found in an animal cell

Chloroplast and chlorophyll
 

ANSWERED AT 18/01/2020 - 12:29 PM


QUESTION POSTED AT 18/01/2020 - 12:29 PM

Prokaryotic cells reproduce by

Prokaryotic cells reproduce by binary fission , which includes the chromosomes splitting into two equal parts.

ANSWERED AT 18/01/2020 - 12:25 PM


QUESTION POSTED AT 18/01/2020 - 12:25 PM

Scientists group organisms into kingdoms by looking at specific characteristics. Which is a characteristic of a carrot plant? no cell walls heterotrophic unicellular eukaryotic

Scientists group organisms into kingdoms by looking at specific characteristics. The characteristic of the carrot plant is eukaryotic. Organisms with eukaryotic cells are whose cells contain a nucleus and other organelles enclosed within membranes.

Explanation:

Eukaryotes are organisms whose cells have a nucleus surrounded by membranes, unlike prokaryotes. Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and regulates the structure of proteins and ribosomes.

ANSWERED AT 18/01/2020 - 12:25 PM


QUESTION POSTED AT 18/01/2020 - 12:25 PM

Producers are the most important biotic factor in an ecosystem. a. True b. False

Answer;

The above statement is True.

Explanation;

-Biotic factors are the living components of an ecosystem and are sorted into three groups: producers or autotrophs, consumers or heterotrophs, and decomposers or detritivores.

-Producers are living things within an ecosystem that make life possible for all other organisms. This is because they produce something very important. They are important parts of an ecosystem. Producers are the green plants. They make their own food. Consumers on the other hand are animals and they get their energy from the producers or from organisms that eat producers.

ANSWERED AT 18/01/2020 - 12:24 PM


QUESTION POSTED AT 18/01/2020 - 12:24 PM

What does a cell use to break down glucose during cellular respiration

Cells use Glycolysis to break down glucose 

ANSWERED AT 18/01/2020 - 12:22 PM


QUESTION POSTED AT 18/01/2020 - 12:22 PM

Asexual reproduction requires two organisms follows the joining of sperm and egg cells produces an exact copy of the parent organism produces offspring that is not identical to the parent

Asexual Reproduction... produces an exact copy of the parent organism.

ANSWERED AT 18/01/2020 - 12:14 PM


QUESTION POSTED AT 18/01/2020 - 12:14 PM

Which process produces offspring that are better able to cope with changes in the environment? Mitosis Cell division Asexual reproduction Sexual reproduction

The correct answer is an asexual reproduction. The process of asexual production is the process in which produces offspring that are better and is able to cope with changes in the environment. The offspring will only inherit the parent's genes, however, not the fusion of the gametes. 

ANSWERED AT 18/01/2020 - 12:11 PM


QUESTION POSTED AT 18/01/2020 - 12:11 PM

Name the four ways that a neurotransmitter leaves the synapse after being release by a pre-synaptic cell?

Up next I will present the two principal mechanisms by which neurotransmitters are disposed of in order to maintain the synapse from becoming unresponsive. These are Enzymatic degradation and Re-uptake.

I hope it helps, Regards.

ANSWERED AT 18/01/2020 - 12:08 PM


QUESTION POSTED AT 18/01/2020 - 12:08 PM

Sexual reproduction only requires one parent produces an exact copy of the parent organism requires the sperm and egg cells is the same as mitosis

Best answer Sexual Reproduction... requires the sperm and egg cells.

ANSWERED AT 18/01/2020 - 12:08 PM


QUESTION POSTED AT 18/01/2020 - 12:08 PM

Dinosaurs were the dominant land animal of the Mesozoic Era. true or false

Dinosaurs where the dominant animals, so the answer is true.

Explanation;

The Mesozoic Era lasted more than 180 million years. Throughout this time, many contemporary forms of plants, invertebrates, and fishes developed. On land, dinosaurs were the dominant animals, while the oceans were populated by large marine reptiles, and Pterosaurs ruled the air.

ANSWERED AT 18/01/2020 - 12:07 PM


QUESTION POSTED AT 18/01/2020 - 12:07 PM