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3 years ago

Use the drop-down menus to answer the questions.

Biology

2 answers:

ANEK [815]3 years ago

8 0

Answer:

double membraned nucleus;
i.cell wall and large permanent vacuole

Explanation:

nucleus of eukaryotic cell sarronded by double membrane in which its internal structure,bear genetic materials in chromosomes, in prokaryotic cell genetic materials exist independently in a circle DNA has nuclear material not surrounded by a double membrane.

NikAS [45]3 years ago

5 0

Answer:

B and C

Explanation:

You might be interested in

What is the impact of developing and using rock, mineral, and energy resources on earth's living and non living systems

77julia77 [94]

Answer: The use of rock, mining and energy production contaminates the environment by affecting the abiotic land mass. And therefore, by contaminating the habitat, the living beings that live there are harmed.

Explanation:

Mineral and rock extraction, transport and processing comprise actions that produce environmental impacts because it produces a certain disturbance to the surface and underlying strata, as well as to aquifers. These impacts can be short-lived, lasting as long as the mine is operational, or they can persist after mine development has been completed.

Major impacts include:

Contamination of soil, vegetation, drainages, rivers and groundwater aquifers contamination from leaking tailing piles and slurry ponds. If not properly treated, effluent from surface or subway mine water disposal can be highly acidic, and will contaminate surface waters and shallow groundwater with heavy metals, nitrates or oil from equipment, reducing local water supplies. During surface mining, movement and stockpiling of overburden, constructions or covering of soils alter rivers, drainages and coastal areas.

Surface disturbance caused by access roads, pits, and site preparation.
Noise and emissions from the operation of equipment.
Air pollution, atmospheric dust from traffic, excavation, drilling and site clearing. Atmospheric particulates come from blasting, excavation and earth moving, transportation or any operations that occur on the surface of subway mines.
Removal of rock strata can disrupt the continuity of the local aquifer, and cause interconnections and contamination between groundwater.

Both surface and subway mining include a drainage of the mine area and discharge of mine water, the removal and storage/disposal of large volumes of waste and the transfer and processing of minerals or construction materials. This requires the use of diesel or electric mining and haulage equipment. Transportation of ore within the mine area and to processing facilities may use trucks, conveyors, rail, polyduct or conveyor belt which are vehicles that emit large amounts of carbon dioxide.

Processing plants may be located in mountainous regions and so may have difficulty disposing of production wastes and other pollutants. They may then end up disposing of them in rivers or coastal waters.

The land at the surface of the mines will be unstable, there will be fracturing and subsidence, it will modificate soils, vegetation, rivers, wildlife habitat, wetlands, causing a temporary or permanent loss of land productivity, and contamination of soils due to mineral materials and toxic substances.

Also, the production and use of energy is the main cause, together with transportation, of greenhouse gas emissions, the gases responsible for climate change. Consequences of climate change are increased temperatures, rising sea levels and reduced rainfall.

The current model of generation, transport and consumption, absolutely dependent on fossil fuels, is unsustainable. The chemical products emitted, mainly from coal and oil-derived thermal power plants, are transported by the wind and deposited by rainfall thousands of kilometers away from their origin, causing "acid rain", which is the cause of the deterioration and destruction of forests, lakes and other ecosystems. Another example are the Nuclear power plants which produce high-level radioactive waste (long-lived, highly radioactive), which poses a constant threat to the environment due to the current inability to manage it.

Thus, the use of rock, mining and energy production contaminates the environment by affecting the abiotic land mass. And therefore, by contaminating the habitat, the living beings that live there are harmed.

6 0

3 years ago

Examine this partial food web below for a particular terrestrial ecosystem. species c is toxic to predators. which species in th

Elina [12.6K]

The species that has the same predators as species c would benefit the most

8 0

3 years ago

chambers A and B are placed next to each other but are separated by a film permeable to both glucose and fructose. chambers A co

Molodets [167]

Answer:

2.glucose move into chamber B faster than fructose

Explanation:

Facilitated diffusion: refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this passive transport. If uncharged molecules need to be carried this process depends on concentration gradients and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion. Facilitated diffusion is a passive transport process because the cell does not need any energy to make it happen.

The exposed scenario is an example of facilitated diffusion, a process that occurs in favor of the concentration gradient, and which rate depends on the concentration of molecules in each side of the membrane, in this case, glucose and fructose, among other factors that might also influence the diffusion rate. So, as the concentration of glucose is higher in chamber A (80%), and lower in chamber B (20%), in comparison with fructose, the first one will diffuse faster than fructose. The difference in concentration between both chambers is sharper in glucose, so its transport is faster than the fructose transport, which will also diffuse but at a lower rate.

7 0

3 years ago

A cat standing near a pond looking at the fish in water. Which of the following statement is correct?

salantis [7]

Answer:

The fish appears nearer to the cat than it really is

Explanation:

The situation above is related to the refraction of light. The cat will think that the fish is closer to him, however, it is actually at a different depth in its actual position. This is because of the refraction of light as it travels in two different mediums: water and air. The eyes and brains are not capable of tracing the light rays' refraction, thus, the cat's image of the fish is on a shallower depth. In reality, the light rays reflecting from the fish are actually being refracted on the water's surface.

8 0

3 years ago

A client is admitted to the emergency department in diabetic ketoacidosis (DKA) with a blood glucose level of 485 mg/dL. The cli

Natasha_Volkova [10]

Answer:

Regular insulin

Explanation:

Regular insulin is a fast insulin. After being applied, its onset of action takes between half an hour and its maximum effect occurs between two to three hours after application. It is usually used to treat type 1 diabetes mellitus, type 2 diabetes mellitus, gestational diabetes, diabetes complications such as diabetic ketoacidosis (DKA) and hyperglycemic hyperosmolar coma.

6 0

3 years ago