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sergejj [24]
3 years ago
9

1. Which of the following is true of flatworms and humans, but not of ferns?

Biology
1 answer:
Mashcka [7]3 years ago
4 0
1 They are heterotrophic  
2 Chloroplast
3 A respiratory system in the lungs 
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How are viruses different from bacteria
Butoxors [25]

I believe the correct answer is that viruses are not cells while bacteria are cells with organelles.

<h2>Explanation:</h2><h3>Viruses</h3>

Viruses can simply be explained as genetic materials enclosed in capsules that protects them from the immune system.

Viruses need a host to survive since they lack a mechanism to replicate in meaning they are obligate intracellular organisms.

Reproduction of viruses is through attaching their DNA or RNA into the machinery of the host that replicates them as part of the normal DNA of the cell.

They are the smallest living organisms and cannot be seen microscopically.

They cannot be infected but rather can infect bacteria

They have a capsid that protects the viral material and also contains the receptors attachments that are able to attach to the specific sites which they are infecting. Some of them have an extra layer of a membrane that is called an envelope that further protects the viruses from their hostile environment

They are treated by antiviral medications that affects their replication on normal cells.

They are pathogenic by destroying the cells they enter after successfully replicating their genetic material.

They can either have DNA or RNA but never both.

<h3>Bacteria</h3>

They are cellular prokaryotes with cell organelles that keeps them functional

They can be obligate intracellular organisms or they can survive outside the cell without any problem depending on the particular species of the bacteria since they have cell organelles that can function.

Bacteria reproduce through a process called binary fission where the cell organelles just double up and the cell pinches into 2 different sections with equal distribution of genetic materials forming 2 different cells.

They can be infected by types of viruses called bacteriophages that use the hosts nucleoid to replicate.

They have a cell membrane and a cell wall which encloses the inner contents of the bacteria and also protects the bacteria from the immune system.

They are treated by antibiotics such as β-lactam antibiotics that destroys their cell wall making it porous and the cell eventually dies.

They do not enter the host for reproduction but rather they kill the host through toxins such as toxin A and toxin B

They do not have a nucleus but have the nucleoid that contains the DNA of the bacterium.

Level: High School

Subject: Biology

Topic: The cell

4 0
4 years ago
Read 2 more answers
Which of the following are matched correctly?
kogti [31]

Answer:

<u>1. type IV hypersensitivity: delayed-type hypersensitivity.  </u>

<u>2. type I hypersensitivity: IgE  </u>

<u>3. type II hypersensitivity: IgG  </u>

<u>4. type III hypersensitivity: immune complexes </u>

Explanation:

Type IV hypersensitivity is cell mediated hypersensitivity rather than antibodies as in all other types of hypersensitivities. It is also known as delayed type hypersensitivity because it usually respond in 2-3 days via T-Lymphocytes rather than antibodies like IgE or IgG. So we can say that in option 5 is mismatched as it relates type IV to IgG antibodies.

4 0
4 years ago
Which of the following belong to the Cilates?
Salsk061 [2.6K]

Answer:

Paramecium.

Explanation:

Ciliates are group of protozoans organisms that are characterized by special organelles called cilia.

Cilia is used for loccomotion in ciliates and can also be use to move food into the body. The cilia can be use for swimming, crawling, for attachment and sensation. Some ciliates are free living while some are parasitic. They are found in the aquatic habitats both fresh water and ocean.

7 0
3 years ago
Describe two desert animals and the adaptation that help them survive
WITCHER [35]

Answer:

Describe two desert animals and the adaptation that help them survive?

Camel and Donkey

Explanation:

Both animals have two different types of stomach that enables them to store water for a very long time and makes them withstand drought

7 0
3 years ago
based on the flow of energy and biomass in ecosystem, determine the rough proportion of producers and consumers needed in the ec
Mila [183]
The number of producers is more than consumers and top carnivores in ecosystem. for example:- in the food chain of grass--goat--man,atleast 90% of energy is pasted to other level and 10% will be stored at that level it self. 
        grass                 goat                   man
       50/100               40/80                30/60.
as we human beings depend on plants and animals for our food for our whole life we need atleast 100 numbers of small plants for one week.
5 0
3 years ago
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