What is the difference between a food chain and food web

Answer:

photosynthesis is the process in which plant make food by themselves from using sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Answer:

Photosynthesis is a process through which plants and other organisms transform light energy into chemical energy, which is then released to power the organism's metabolic processes through cellular respiration.

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Answer:

Option C

Explanation:

Answer:

A. donation of excited electrons by chlorophyll a to a primary electron acceptor

Explanation:

Photosystems are structures located at the thylakoid membrane that act to harvest energy light in order to convert it into chemical energy. Each photosystem is composed of a light-harvesting complex and a core complex, which in turn is composed of a reaction center. The photosynthetic reaction centers are multi-protein complexes that use light energy to catalyze the electron transfer across the chloroplast thylakoid membrane against a thermodynamic gradient. Moreover, antenna pigments are pigments that capture the energy from photons in order to transfer energy to other pigments in the photosystem (e.g., chlorophyll B and carotenes are antenna pigments, whereas chlorophyll A is the core pigment). Light energy absorbed by antenna pigments in the photosystems is transferred to the reaction center chlorophyll A molecules, thereby exiting electrons in the reaction center. A reaction center consists of two chlorophyll A molecules, which donate electrons to the primary electron acceptor.

Answer:

The small intestine is about 20 feet (6 meters) long and folds many times to fit in the abdomen. Although it is longer than the large intestine, it is called the small intestine because it is smaller in width.

I hope this will help you

Answer:

Approximately 2.5 centimetres wide.

Explanation:

That is, assuming it is a human's small intestine.

Since the reason of the large surface area of the gills, gas exchange in fish is very efficient. the blood capillaries' large surface area in each gill filament The outer layer of the gill filaments as well as the capillary walls are only one cell thick due to the short distance required for diffusion.

A gill is a respiratory organ found in many aquatic organisms that allows them to extract dissolved oxygen from water and expel carbon dioxide.

Some species' gills, such as hermit crabs, have adapted to allow them to breathe on land as long as they are kept moist.

Water runs over the gills as the fish opens its mouth, and blood in the capillaries picks up oxygen dissolved in the water. The blood then circulates through the fish's body to deliver oxygen, just as it does in humans.

Fish have gills, which allow them to "breathe" oxygen from the water. Water enters the mouth, travels through the gills, and exits the body via a special opening.

As the water passes over them, the gills absorb oxygen from it. The body of a fish is stream-lined.

Thus, these are the ways, in which fish gills are adapted for efficient gas exchange.

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Answer:

hashish

Explanation:

opinum

Explanation:

because it is used to make pain nubbing/pain killer

Answer:

C

Explanation:

The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell. The lysogenic cycle involves the incorporation of the viral genome into the host cell genome, infecting it from within.

The common cold virus is replicated using the lytic cycle, by introducing its genome into the host and using its cellular machinery, hence option c is correct.

The common cold virus is replicated by using the lytic cycle, in which the virus introduces its genome into the host genome and uses all the replicating machinery of the virus.

The lysogenic cycle is different from the lytic cycle in which the viral genome replicates on its own and does not integrate its genome into the host genome.

After replicating its genome with the host genome, the viral genome is excised from the host genome and assembled into new viral particles for infecting other host cells. The new viral particle lysed the host cell and spread to other cells.

Therefore lytic cycle is used by the common cold virus, hence option c is correct.

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Answer:

I think the ans is no.a ok

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Answer:

Reproduction is one of the most important characteristics of living beings, because -

- The existence of any species is dependent on the reproduction because no living being is immortal.

After death of a being of one generation,the existence of that died being is completed by the newborns of the next generation.

And,the birth of newborns of next generation is only possible by the reproduction.

- The variation and mutation in the biological characteristics is often necessary which is only possible by reproduction through many generations.

- When a living being becomes old, it's become unable to do normal tasks like collection of food, finding shelter etc,at that moment,the newborns of next generation do the necessary jobs.

And as mentioned before,these newborns are only possible due to reproduction.

Answer:

Explanation:

Gene expression is the process by which the instructions in our DNA are converted into a functional product, such as a protein. It acts as both an on/off switch to control when proteins are made and also a volume control that increases or decreases the amount of proteins made.

Answer:

Explanation:

The appropriate answer is 'space filling models do not identify the number and type of bonds'. A space filling model is one type of three dimensional (3D) molecular model used to represent molecules of different chemical compounds. The structure of this type of arrangement shows that, for example, two elements are bonded but it does not show if it is a single, double or triple bond.

Answer:

Explanation:

During meiosis one cell, divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes of the parent cell.  they are haploid. Meiosis produces our sex cells or gametes. (eggs in females and sperm in males)

Answer: D. Seining

Explanation:

Seine fishing refers to a method of fishing whereby a fishing net, which is referred to as a seine, is hanged vertically in the water.

Seining is typically done in water that is less than 12 feet in depth and it works well when the aquatic plants and the algae doesn't disturb the water. In the seining method, a large net on two poles is used and it's a commercial fishing technique is associated with excessive bycatch.

Answer:

Long line fishing

Explanation:

It gathers more than seining

Answer:

A. Fast growing crops, heavy rains

Explanation:

Fast growing crops will increase soil nitrates, while heavy rains will decrease soil nitrates.

Animal manure has organic waste containing nitrogen that acts as a source of nitrate in the soil and growing crops absorb nitrate from the soil. Thus option C is correct.

Nitrate is an organic compound of nitrogen that is present in the fertile soil and absorbed by the plants. The Source of nitrate is humus and fertilizer. Humus is obtained from animal manure, and dead and decaying animal and plant bodies.

Fast-growing crops absorb the nitrate from the soil and use it for development and growth such that nitrate decrese in soil. So option C is correct.

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Answer:

neutral?

Explanation:

Answer:

Humans have a variety of effects on the physical environment, including overcrowding, pollution, the use of fossil fuels, and deforestation. Climate change, soil erosion, poor air quality, and undrinkable water have all been driven by such changes.

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Explanation:

There are some factors which affect the rate of diffusion. These are:-

The partial pressure of oxygen.

The partial pressure of carbon dioxide.

Temperature.

The concentration of gases.

The thickness of the membrane.

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Answer:

the thickness of membrane

Answer:

1. Chloroplast

2. cellular respiration

3. ATP

4. C6H1206(s) + 02(g) -- CO2(g) + 6H20(I) + energy

Explanation:

This question is describing the processes of photosynthesis and cellular respiration. Photosynthesis occurs in the CHLOROPLAST, which is responsible for the conversion of solar energy (from sun) into chemical energy (in glucose). The general photosynthetic reaction is:

6CO2(g) + 6H2O(l) + energy → C6H12O6(s) + O2(g)

Contrarily, the process of cellular respiration occurs in the MITOCHONDRIA. Cellular respiration involves the breaking down of food molecules to synthesize ATP (energy) for use during biochemical reactions. The general chemical reaction is as follows:

C6H1206(s) + 02(g) → CO2(g) + 6H20(I) + energy

Answer:

You would not be able to prove that an atomic bomb was dropped on Hiroshima using the scientific method Because it is a historical event. You would not be able to prove that an atomic bomb was dropped on Hiroshima using the scientific method Because it is a historical event.

Answer:

The waves have the same frequency because they have the same amplitude.

Answer:

Structure of amoeba primarily encompasses 3 parts – the cytoplasm, plasma membrane and the nucleus. The cytoplasm can be differentiated into 2 layers – the outer ectoplasm and the inner endoplasm. The plasma membrane is a very thin, double-layered membrane composed of protein and lipid molecules.

Explanation:

Answer:

The answer is all of the above are correct.

Explanation:

Chemosynthesis occurs in bacteria and other organisms and involves the use of energy released by inorganic chemical reactions to produce food. All chemosynthetic organisms use energy released by chemical reactions to make a sugar, but different species use different pathways. For example, at hydrothermal vents, bacteria oxidize hydrogen sulfide and add carbon dioxide and oxygen to produce sugar, sulfur, and water:  

CO2 + 4H2S + O2 ⇒ CH20 + 4S + 3H2O.

Chemosynthesis is the process by which food (glucose) is made by bacteria using chemicals as the energy source, rather than sunlight. Chemosynthesis occurs around hydrothermal vents and methane seeps in the deep sea where sunlight is absent. During chemosynthesis, bacteria living on the seafloor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in seawater). Pure sulfur and sulfur compounds are produced as by-products.

Answer: cells, chlorophyll, nucleus, chromosomes, organelles, interphase, endoplasmic

Explanation:

1.water is called universal solvent it can dissolve almost every solute on it

2.water can show anamolus expansion which mean it density will me most on 4 degree celsius

3.it is neutral substance

Answer:

7. Substitution mutation

8. Substitution mutation

9. Frameshift mutation

Explanation:

A substitution mutation is any kind of mutation that involves replacement of one or more nucleotide base by another in a sequence.

A frameshift mutation, on the other hand, is a mutation that changes the reading frame of the sequence. Two types of mutations cause frameshift viz: insertion and deletion mutation.

In the following sequences, mutation has occured as follows:

7. UGU-CCG-GAA-CGA to UGC-CGG-GAA-CGA - Substitution mutation has occured because nucleotides C and G has replaced C and U in the first and second codons respectively.

8. GAA-CGU-AGC-GGU to GAU-CGU-AGC-GGU- A substitution mutation because nucleotide U has replaced A in the first codon.

9. UGU-UUC-CCU-UAA to UGU-UCC-CUU-AA - A frameshift mutation because nucleotide U has been removed from the second codon, hence, causing a change in the reading frame.

Answer:

50%

Explanation:

In this case, it is imperative to know each genotype >>

1. Genotypes for leg trait

- LL: normal legs

- Ll: deformed legs

- ll: very short legs  

2. Genotypes for fur trait

- BB: black fur

- Bb: brown fur

- bb: white fur

According to the data above, the parental cross is as follow:  

BBLl X bbLl  

The possible gametes for each parental genotype are as follow:  

Parental 1 >> 1/2 BL; 1/2 Bl

Parental 2 >>1/2 bL; 1/2 bl

Punnett square to calculate the possible genotypes of offspring:  

              bL      -             bl

BL    1/4 BbLL    -   1/4  BbLl

Bl     1/4 BbLl     -   1/4  Bbll

In consequence, the expected proportion of offspring with deformed legs and brown fur (genotype BbLl) is 1/2, i.e., 50%.

Answer:

Capillary reabsorption does not depend on oncotic pressure

Explanation:

Edema refers to the swelling caused by the fluids trapped in the body's tissues, which swell from injury and/or inflammation. Edema can be associated with the decrease in plasma oncotic pressure, i.e., osmotic pressure exerted by proteins (especially albumin) in the blood vessel's plasma, the increase in hydrostatic pressure, or the increase in the capillary permeability. Moreover, capillary reabsorption refers to the movement of fluid from interstitial space to the capillaries, which is driven by the blood colloidal osmotic pressure. Lymphatic obstruction, i.e., the blockage of the lymph vessels that drain fluids from tissues, may cause edema in the part that is drained by the affected vessels (it is known as lymphedema). Moreover, liver/kidney failure may lead to edema by decreasing albumin and oncotic pressure. When plasma albumin levels drop because of liver diseases, the colloid osmotic pressure also decreases. In consequence, liver diseases, including stage 3 cirrhosis, lead to the development of swelling in the abdomen, thereby leading to edema.