i need help now.
pls.
which is a tissue?

Answer:

A

Explanation:

It can help a population to survive but it is not necessary.

Explanation:

Enzymes bring reactants together so they don't have to expend energy moving about until they collide at random. Enzymes bind both reactant molecules (called the substrate), tightly and specifically, at a site on the enzyme molecule called the active site

The site on the enzyme at which reactants are brought together during a chemical reaction is known as the active site.

Enzymes may be defined as biocatalysts that increase the rate of a chemical reaction without being consumed or changed in the overall process. It may be thought that all cellular reactions and processes are mediated by enzymes.

The construction of the enzyme-substrate complex is the first step in the mechanism of enzymatic catalysis. In this step, the reactant molecules are brought together during a chemical reaction. These reactant molecules bind to the active site of an enzyme.

The Active site of an enzyme is the region where substrates bind and catalysis initiates.

Therefore, the active site is the region on the enzyme at which reactants are brought together during a chemical reaction.

To learn more about the Active site of an enzyme, refer to the link:

https://brainly.com/question/22318217

#SPJ2

Answer:

The carbon is moving into the air

Explanation:

Since the zebra is not eating, the carbon is only moving into the air and not out of the air

Answer:

The two strands of the DNA double helix uncoil at a specific place termed the origin during separation. The strands are then primed for duplication by a combination of enzymes and proteins. Finally, the assembly of the new DNA strands is organized by a specific enzyme called DNA polymerase.

Explanation:

Answer:

Explanation: SOLID SAMPLE :

1. Peel off the skin of any vegetables e.g. potato and fruits as these are often impermeable. Use a clean spatula to remove samples of powdered food. Avoid cross-contamination with other foods.

2. Add a few ( 2-3) drops of bench iodine solution potassium to a piece of solid food on a white tile.

3.Make observations.                                                  

                       LIQUID SAMPLE:

1. Add 10 cm3 of the liquid food sample to a clean, dry test tube.

2.Add about 5 drops of iodine solution to the test tube.

3.Note any colour changes.

4.To prepare a control, perform steps 1 -3 for de-ionized water.

Answer:

Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.Explanation:

Answer:

Not entirely positive but I do know that bioluminescence is a natural substance found in many living creatures and it makes them glow. They could be testing products for ideas of what undiscovered life is on earth. But all I do know is bioluminescence is an ingredient that causes things to glow.

Explanation:

Bioluminescence refers to a living thing that produces and emits light. Glow-in-the-dark animals can be found in all marine ecosystems, including those at the ocean's surface and deepest depths.

Utilizing bioluminescent bacteria, they can swiftly determine the quantity of bacteria present and end the experiment much more quickly, resulting in less pain, a shorter experiment duration, and the usage of fewer animals.

Current applications of the bioluminescence reaction include gene assays, the detection of protein-protein interactions, high-throughput screening (HTS) for drug development, hygienic monitoring, the assessment of environmental contamination, and in vivo imaging of tiny mammals.

To learn more about Bioluminescence refer to:

https://brainly.com/question/14099690

#SPJ2

Answer:

True

Explanation:

Answer:

chromosomes

Explanation:

Answer:

Explanation:

A nuclear reactor is an installation capable of initiating, maintaining and controlling the chain fission reactions that take place in the reactor core, consisting of the fuel, coolant, control elements, structural materials and moderator in the case of nuclear thermal reactors.

The core is the part of the reactor where the nuclear chain reaction is produced and maintained.

Components of the core:

The fuel of a nuclear reactor is fissionable material.

Control rod beams provide a rapid means of controlling the nuclear reaction, allowing rapid changes in reactor power and eventual shutdown in case of emergency.

The neutrons produced in fission have a high energy in the form of velocity. Their speed should be reduced to increase the probability of other atoms fissioning and not to stop the chain reaction. This is achieved by elastic collisions of the neutrons with the nuclei of the moderator.

Most of the energy released by fission is in the form of heat. To be able to use this, a refrigerant must pass through the interior of the reactor that absorbs and transports this heat.

In a nuclear chain reaction, a certain number of neutrons tend to escape from the region where it is produced. This neutron leakage can be minimized by the existence of a reflecting medium, thus increasing the efficiency of the reactor.

When the reactor is in operation, a large amount of radiation is generated. Protection is needed to isolate the installation workers from radiation caused by fission products. Therefore, a biological shield is placed around the reactor to intercept these emissions.

A breeder reactor is a nuclear reactor that generates more fissile material in the fuel than it consumes. Considered highly attractive because of their superior fuel economy: a normal reactor consumes less than 1% of the natural uranium that starts the fuel cycle, while a 'breeder' can burn it almost completely. It also generates less waste for the same amounts of energy. Breeders can be designed to use thorium, which is more abundant than uranium. Currently, there is renewed interest in both breeder designs due to the increased price of natural uranium.

All commercial reactors breed fuel, but they have low (though still significant) breeding ratios when compared to machines that are traditionally considered breeders. In recent years, the commercial energy industry has been emphasizing high burn fuels, which last longer in the core of the reactor.

Reproduction of fissile fuel is a common feature in reactors, but commercial reactors are not optimized for this feature which is referred to as improved burning. Up to one-third of all electricity produced in the current U.S. reactor inventory comes from reproducible fuel, and the industry is working hard to increase that percentage over time.

The advantages are:

Generates a large amount of electricity

No production of greenhouse gases

Dependence on oil is reduced

Less damage to the environment

A major disadvantage is the difficult management of the nuclear waste generated.

Nuclear power plants have a limited lifetime. The investment for the construction of a nuclear plant is very high.

Answer:

Frequency results from environmental stresses, not dominance.

Answer:

I think false sorry if wrong

Answer:

1)Oil and water

2)flour and butter

3)tea and sugar

4)baking powder

5)soda and lemon juice

Answer:

mixed nuts

cake mix

cookies

mixed chocolate

ketchup

Explanation:

because all these mixtures are mixed

Answer:

chloroplasts and cell wall

Explanation:

These are only found in plant cells.

Answer:

Explanation:

The principal constituents of milk are water, fat, proteins, lactose (milk sugar) and minerals (salts). Milk also contains trace amounts of other substances such as pigments, enzymes, vitamins, phospholipids (substances with fatlike properties), and gases.

Answer:

pulmonary artery could become blocked.

Explanation:

The right pulmonary artery could become blocked, restricting blood flow to the right lung. A narrow region of the superior vena cava could become blocked, restricting blood flow to the heart.

Answer:

True

Explanation:

As they revolve around the Sun in elliptical orbits, the asteroids also rotate, sometimes quite erratically, tumbling as they go. More than 150 asteroids are known to have a small companion moon (some have two moons).

pls mark brainliest if I'm correct

Answer:

B is the correct answer

Answer:

Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see. They have the distinction of being the oldest known fossils, more than 3.5 billion years old, in fact! It may surprise you then to know that the cyanobacteria are still around; they are one of the largest and most important groups of bacteria on earth.

Many Proterozoic oil deposits are attributed to the activity of cyanobacteria. They are also important providers of nitrogen fertilizer in the cultivation of rice and beans. The cyanobacteria have also been tremendously important in shaping the course of evolution and ecological change throughout earth's history. The oxygen atmosphere that we depend on was generated by numerous cyanobacteria during the Archaean and Proterozoic Eras. Before that time, the atmosphere had a very different chemistry, unsuitable for life as we know it today.

The other great contribution of the cyanobacteria is the origin of plants. The chloroplast with which plants make food for themselves is actually a cyanobacterium living within the plant's cells. Sometime in the late Proterozoic, or in the early Cambrian, cyanobacteria began to take up residence within certain eukaryote cells, making food for the eukaryote host in return for a home. This event is known as endosymbiosis, and is also the origin of the eukaryotic mitochondrion.

Because they are photosynthetic and aquatic, cyanobacteria are often called "blue-green algae". This name is convenient for talking about organisms in the water that make their own food, but does not reflect any relationship between the cyanobacteria and other organisms called algae. Cyanobacteria are relatives of the bacteria, not eukaryotes, and it is only the chloroplast in eukaryotic algae to which the cyanobacteria are related.

Explanation:

Answer:

Concentration Gradient

Answer:

All Whales and Dolphins are a member of the Even-toed Ungulates or Artiodactyla. The groups closest living relatives are Hippos, sharing an ancestor approximately 47 million years ago. Once upon time, it was thought that Whales and Dolphins were closely related to extinct land-dwelling carnivores.

Explanation:

Answer:

transport of protons (H+) from low concentration in the mitochondrial matrix to high concentration in the mitochondrial intermembrane space

Explanation:

atpase pump can also be called atp synthase. this enzyme catalyses atp formation from adenosine diphosphate and phosphate. it has f1, stalk and f0 components. 3 positive hydrogen ions go through to make 1 adenosine triphosphate molecule. oxidative phosphorylation has to do with the loss of electrons. there would be electrons loss from NADH to FADH2. Cytochromes carries them through different series of transferases from I to IV and while on this positive hydrogen ions are released into mitochondrial matrix

positive hydrogen ions are moved back to lumen through adenosine triphosphate channels. a process called chemiosmosis. the pro

Answer:

The correct answer is "building gradients of substances across the outer cell membrane"

Explanation:

Building gradients of substances across the outer cell membrane is a form of diffusion in which substances move across cellular membranes based on there independent gradient. This form of movement is a type of passive transport because it does not require the use of ATP for transport. The building gradients of substances across the outer cell membrane requires diffusion and does not require the use of ATP.

Movement of vesicles along cytoskeletal tracks requires individual vesicles to be transported by there respective motor proteins along the cytoskeletal tracks. These motor proteins require ATP to move these vesicles. Also, the phosphorylation of a motor protein in the cytosol requires one phosphorus molecules from ATP.

Transport of protons (H+) from low concentration in the mitochondrial matrix to high concentration in the mitochondrial intermembrane space is a description of the "hydrogen pump" that occurs in the electron transport chain. When hydrogen ion pump occurs, the hydrogen ion gets flown back through a ATP molecule.

Answer:

Eukaryotic organisms that cannot be classified under the kingdoms Plantae, Animalia or Fungi are sometimes grouped in the kingdom Protista.

Explanation:

Answer:

C

Explanation:

thats the answer im done whit that

Answer:

a. facilitated diffusion

Explanation:

Instead, cells assist glucose diffusion through facilitated diffusion and two types of active transport.

Answer:

The Answer is B

Explanation:

I got it right on USA TEST PREP

Answer:

methylene blue

I hope this help

Answer:

The rate of fermentation can be measured by placing a small amount of yeast and sugar solution in a fermentation tube.

Explanation:

Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes