Which of the following organisms does NOT require sunlight to live?a. chemosynthetic bacteria
b. algae
c. trees
d. photosynthetic bacteria

Answers

Answer 1

Answer:

Chemosyntheticbacteria do not require sunlight for their survival. So the correct option is A.

What is chemosynthesis?

Autotrophicorganisms like plants prepare their food by using sunlight as a source of energy which is converted to chemical energy. But some bacteria, that live deep below the surface of the ocean use chemicalenergy to prepare this food.

This process is known as chemosynthesis as it uses chemical energy instead of light energy. It uses carbon in the form of carbon dioxide or methane and some inorganic nutrients which are converted into organic matter.

In this process, the inorganicmatter is oxidized to produce energy. In a specific mind of chemosynthesis called hydrogen sulfide chemosynthesis, carbon dioxide and oxygen are used to produce CH₂O, a carbohydrate.

Following is the reaction

CO₂ + O₂ + 4H₋S → CH₂O + 4S + 3H₂O

The organisms that perform chemosynthesis are called chemoautotrophs.

Therefore the correct option is A.

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Answer 2

Answer: The answer is A. Chemosynthetic bacteria

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Cells that secrete protein fibers in bone are called

Answers

Answer:

Osteoblasts

Explanation:

Cells that secrete protein fibres in bones are called osteoblasts.

I hope this helps.

The marine flatworms (polycladids) are the smallest of the free-living flatworms sometimes reaching lengths of 15 centimeters true or false?

Answers

False!

The marine flatworms (polycladids) are the greatest of the free-living flatworms. Most of them are about 1 centimeter in length, but there are some species that can reach lengths of 15 centimeters. They belong to the Phylum Platyhelminthes or flat worms. A great number of species are parasites, but there are some species that are free-living and they belong to the group of Polycladids.

The hydrilla, a non-native species of the Hudson River Estuary, has begun to grow along the surface of the water and spread throughout the watershed. Which of the following is true of the hydrilla growing in the Hudson River Estuary?The hydrilla will be a helpful in increasing the number of phytoplankton in the water.
The hydrilla will increase the amount of natural plant growth in the estuary.
The hydrilla is an invasive species, and its presence will have an overall negative effect on the estuary.
The hydrilla needs to be trimmed back every year.

Answers

The right answer for the question that is being asked and shown above is that: "The hydrilla is an invasive species, and its presence will have an overall negative effect on the estuary." This is the statement that is true of the hydrilla growing in the Hudson River Estuary.

Where is the genetic material of a virus located?

Answers

The structure of virus consists of viral genome, nucleocapsid, tegument, envelope, and envelope protein. The genome is present in the Nucleocapsid.

The simplest of viruses are composed of genetic material and protein or capsid. Viruses do not produce many structural elements however some viruses may have an additional proteinaceous structure around the genetic material called nucleocapsid and a lipid bilayer covering the outer capsid layer called the envelope. The capsid is there to protect the genetic material from degradation. The viral envelope is derived from the host cell membrane and the virus encoded proteins. The sugar moieties attached to those proteins and this feature influences and contributes to the host specificity, host-parasite interaction etc.

The nucleocapsid protein is encoded by the gag gene in HIV virus and in coronavirus, it is the one present in greatest abundance and highly antigenic.

The virus structure varies among the different families and at the least has a capsid and in some there might be a nucleocapsid additionally covering the genetic material of the virus. It is either a capsid or the nucleocapsid and capsid that covers the genetic material.

The viral genetic material is covered by capsid and nucleocapsid.

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The genetic material of a virus is located inside its capsid.

How do active and passive transport differ? is osmosis active or passive

Answers

Well, the cell membrane is full of a bunch of little holes. Sort of like a coffee filter.

What does a coffee filter do? Well, you put the coffee in it and run water through it. Then what?

The water is small enough to pass through the filter and bring some of the coffee with it. But the coffee grains are too big to pass through the filter. If we really wanted the coffee grains to get through the filter, we could force them through. Do you want chunks in your coffee? Eww.

Now the cell membrane is the same way, the little things (water, carbon dioxide, oxygen, sugar) are all small enough to fit through the tiny holes in the cell membrane. This is called, "Passive Transport". Because the things can passively float their way in and out of the cell.

Now some other things are too big to fit through, so to make them fit, the cell has to use energy to open itself a little bit more to let them in. This is called, "Active Transport". Because the cell needs to be active and use energy to let those things in.

Now Osmosis is the transfer of water and salts (basically) throughout the cell.
Both Salt and Water are small enough to fit through the Cell Membrane using "Passive Transport".

I've posted this same response earlier, and it is my writing.

Answer: Passive Transport - Taking the Easy Road. While active transport requires energy and work, passive transport does not. There are several different types of this easy movement of molecules. It could be as simple as molecules moving freely such as osmosis or diffusion.

What is the defining characteristic of a water cycle?A. The water passes through at least five different locations.

B. It does not include any human water usage.

C. It passes through plants, animals and the ocean.

D. It has the same starting and ending point.