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3 years ago

Cell walls are impermeable to transport of most materials required for bacterial nutrition.

Biology

2 answers:

mezya [45]3 years ago

8 0

The given statement is False.

The bacterial cells walls are composed of peptidoglycan, also known as murein. It comprises polysaccharide chains cross-linked by unusual peptides, involving D-amino acids. The bacterial cell walls are distinct from cell walls of fungi and plants that are made up of chitin and cellulose, respectively.

The cell walls in bacteria allow small molecules to pass through them freely, however, do not permit large molecules to pass through them, in this manner, it function as a coarse filter.

The main function of the cells wall is to sustain the shape of the cell and inhibit the cell from bursting due to osmotic pressure. The cell wall allows the components to pass, which are essential for bacterial nutrition.

rusak2 [61]3 years ago

8 0

The answer in true for this question.

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The net effect of the effector is to shut off the original ________, or reduce its intensity, during the negative feedback mecha

Karo-lina-s [1.5K]

Answer:

option D

Explanation:

Negative feedback is a mechanism in which function of a cell or an organ is decreased. It lessened the output of a system and maintain system function which is known as homeostasis. It is a regulatory mechanism of normal physiology. Some of examples are

blood sugar level regulation, regulation of blood pressure, thermoregulation and many more.

5 0

3 years ago

Amphibians moved to a terrestrial environment; however, they did not evolve the ability to live their entire lives on land. Expl

Gekata [30.6K]

Answer:

See the answer below

Explanation:

Amphibians are not totally adapted to live on land because the aquatic environment is needed for several life processes such as reproduction, respiration, and sometimes, feeding.

The eggs of amphibians are without any protective shells and will suffer desiccation in the terrestrial environment. Hence, water is needed in order to protect the eggs. In addition, the male amphibians shed their sperm in the water close to the female eggs.

The young ones of amphibians are essentially aquatic and may not survive out of water for a long time because they only breathe gills - the lung is yet to develop or poorly developed at this stage. They have to grow and develop to a certain stage in water before they can start surviving on land.

3 0

3 years ago

When the protons are concentrated on one side of the membrane, they pass through golgi complex and form what?

Finger [1]

They are composed into vesicles. They may also form lysosomes. Vesicles are packages with the main intent of transporting things out of and around the cell. Lysosomes help the cell digest its food. All vesicles are destined to be sent to a specific place inside the cell.

3 0

3 years ago

All systems should aim to achieve 99.999-percent uptime. true false

Crank

This statement ''All systems should aim to achieve 99.999-percent up time'' is false.

In reality, all systems should aim to achieve an up time of 99.99%

The different between 0.99 and 0.9999 might not seem a lot but if we actually calculate the percentage points it represents and the amount with which we need to improve efficiently, it almost becomes impossible to reach 99.9999% up time.

6 0

3 years ago

Regarding cladistics

leonid [27]

Answer:

Option C, cladistics reveals relative evolutionary branching by utilizing genetic analysis

Explanation:

Cladistics classification is a way of classifying organisms biologically in a way that a relationship between their shared traits could be established which leads to identification of closely related organism and species. It further helps to identify ancestry history of closely related species to identify closely related common ancestors and the evolution of various characteristics.

Basically in Cladistics study, species are arranged on a phylogenetic tree based on the time of their emergence from any other group.

Hence, option C is correct.

8 0

3 years ago