Which two structures are found ONLY in plant cells?

The same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.

The growth of algae is the process by which the organism increases in size. Now we know that that the algae is photosynthetic hence light must be required for its growth.

In order to verify this, the same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.

The results of this experiment must confirm that the algae exposed to light grows better than the algae that was not exposed to light.

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Cell respiration involves different steps, among which there is the oxidative phosphorilation that produces and stores ATP. The answer is the electron transporter chain.

The electron transporter chain + chemiosmosis constitute the process of oxidative phosphorylation.

Chemiosmosis refers to ATP production through a proton gradient.

The electron transporter chain is a series of molecules and proteins located in the internal mitochondrial membrane.

It constitutes a series of enzymatic reactions to release and save energy for the correct functioning of the organism.

Along the chain, there are four proteinic complexes in the membrane, I, II, III, and IV, that contain the electrons transporters and the enzymes necessary to catalyze the electrons' transference from one complex to the other.

Different redox reactions occur to pass electrons along the chain.

Released energy creates a proton concentration gradient used to synthesize ATP.

1) NADH provides electrons to the first complex, Complex I. From there, electrons go to the coenzyme Q that carries them to complex II. Meanwhile, complex I pomp four protons to the intermembrane space.

2) Complex II receives electrons from CoQ and also receives electrons from FADH2. Electrons are sent from complex II to ubiquinone Q, which carries these electrons to complex III.

3) Complex III receives electrons from ubiquinone Q and pomps protons to the intermembrane space. Electrons are transferred to Cytochrome c.

Electrons travel from cytochrome c to complex IV.

4) Complex IV is the last complex that pomps protons to the intermembrane space.

5) Electrons are sent to O₂ molecules, which also receive protons in the matrix to create water molecules. Four electrons are needed to produce two water molecules from one O₂ molecule.

The proton gradient is used to produce ATP molecules.

In conclusion, the set of proteins in the cristae of the mitochondrion, which collectively extract the energy from reduced coenzymes to form atp, are called the electron transporter chain.

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Answer:

D

Explanation:

Selective breeding is when you a breeding 2 organisms in order to make a specific trait be passed down to the offspring.  Since you the offspring in this scenario have larger muscles, this is selective breding because you are "choosing" a trait.  A and B don't mention specific traits, and  C is wrong because you can't garuntee that the offspring will win a race.  D is the most logical choice

Answer: Carbon Dating though measuring Carbon-14 levels

Explanation:

Scientist measure the age of a fossil determined on the Carbon-14 level compared to the Carbon-12 level. This method works because:

The lac repressor protein controls the expression of the lac operon by binding to the operator region of the lac operon.

The lac operon is regulated by a DNA binding protein known as the lac repressor protein, which controls the transcription of the genes within the operon. The lac repressor protein functions as a negative regulator of the lac operon by binding to the operator region of the lac operon.

The operator region is situated upstream of the promoter region and consists of a specific DNA sequence to which the lac repressor protein binds. The binding of the lac repressor protein to the operator region blocks the RNA polymerase enzyme from binding to the promoter region, preventing the transcription of the genes within the lac operon.

When lactose is present in the cell, it binds to the lac repressor protein, causing a conformational change that weakens the interaction between the repressor and the operator region. This allows the RNA polymerase to bind to the promoter region and transcribe the genes within the operon.

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Natural selection lead to the land plants to allowing them to develop adaptations such as root systems,

Natural selection is a process in which the individuals that are best adapted to their environment are more likely to survive and reproduce than those that are not as well adapted. Over time, this leads to changes in a population's traits, as advantageous traits become more common while disadvantageous traits become less common.

In the case of land plants, natural selection caused plants to develop adaptations such as root systems, stomata (structures that allow plants to exchange gases with the atmosphere), cuticles (a waxy protective coating that helps prevent water loss), and vascular tissue (a system of tubules that help transport water and nutrients). These adaptations allowed plants to become better adapted to the environment on land, and over time allowed them to diversify into the large variety of plants we see today.

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Answer:

The mammary gland

Explanation:

The mammary gland is a gland located in the breasts of females that is responsible for lactation, or the production of milk.

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Answer:

The breast

Explanation:

The breasts are organs of the female body that contains milk ducts, adipose tissue, and mammary glands. The two breasts are located on the left and right sides of the thoracic region or upper ventral region of the body. In the middle or hub of each breast is a nipple, which is highly pigmented and releases milk when stimulated.

Answer:

Boiling

Explanation:

Boiling is an increase in energy.

Answer:

melting and condensation should go

R-selected species are indeed short-lived.

Species whose populations are governed by their biotic potential are called r-selected species.

Biotic potential is defined to be the maximum reproductive capacity of a species under optimum environmental conditions. Environmental resistance, which includes any factor that holds back the increase in number of the population, restricts full expression of the biotic potential of a species.

The defining characteristic of r-selected species is the production of numerous small offspring, followed by exponential population growth. R-selected species mature quickly (thus require little or even no parental care), require short gestation periods, and are short-lived. Members of this group, unlike K-selected species, are capable of reproduction at a relatively young age, but many offspring die before they reach reproductive age.

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Hollow bones that are designed to reduce mass for flight are the internal structure that birds have created to assist them successfully fill their niche and prosper in their habitats. Option (b) is correct.

Hollow bones are also known as pneumatized bones since they are filled with air. It is thought that this design helps reduce oxygen usage when flying. Hollow spaces in avian bones are related to air sacs. In essence, their lungs penetrate every bone in their body. Birds have light and hollow bones. Most birds can fly because of the support provided by these bones.

Their hollow bones give their bodies the appearance of being light and simple to lift. The hollow, air-filled bones of the skeleton reduce the weight of the body. The skeleton has been strengthened through skeletal modifications, which allows the push (forward force) produced by the wings to generate a significant lift and propel the bird through the air with the least amount of body cavity compression.

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Correct Question:

Organisms have gradually adapted certain structures that help them succeed in their environments. what internal structure have birds developed that helps them successfully fulfill their niche?

a. oil glands for flight endurance.

b. hollow bones to reduce mass for flight.

c. pointed beaks to increase chances of attracting a mate.

d. webbed feet for landing on tree limbs.

The statement that best describes the principle of standard precautions is you should assume that everyone has the potential to carry an infectious disease. The correct option is A.

These are the steps that are performed to avoid a risky or unpleasant situation.

Because we don't know each person's medical history, we should always take the usual precautions and assume that everyone is at risk of carrying an infectious disease.

Therefore, the correct option is A, You should assume that everyone has the potential to carry an infectious disease.

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The question is incomplete. Your most probably complete question is given below:

Select the best option.

You should assume that everyone has the potential to carry an infectious disease.

It is okay to assume that some patients are not infectious if you have access to their test results and the data is less than a year old.

Standard Precautions tell you exactly which PPE to use for every situation.

Standard Precautions are only used for high-risk patients.

Answer:

Explanation: The interest of farmers in growing lettuce landraces is increasing, as landrace varieties prove particularly appealing to consumers striving to purchase natural, local, and high-quality produce. Although high genetic diversity exists in the landrace gene pool, this has scarcely been studied, thus hindering landrace utilization in agriculture. In this study, we analyzed the genetic diversity and the agronomic and quality traits of lettuce landraces in organic agrosystems, by characterizing 16 landraces and 16 modern varieties. We compared 29 morphological descriptors, and several traits relating to agronomic behavior (total and commercial weight, resistance to Bremia lactucae) and quality (color, chlorophyll, dry matter, and total sugars). Trials were conducted in two localities and managed following organic farming practices. Moreover, farmers and consumers participated in the phenotyping of accessions by scoring yield, resistance to B. lactucae, appearance, and taste acceptance. Results show that cultivar group, rather than the genetic origin (modern vs. landrace), is the major source of variation for all agronomic and quality traits. Batavia and Butterhead were highly homogeneous cultivar groups, while Cos accessions showed a much higher intra-varietal diversity. There was also a clear separation between modern and landrace varieties of Oak leaf. Fifteen out of the 16 evaluated landraces presented a high susceptibility to the particular B. lactucae race isolated from the experimental field - a new race not reported before. Breeding programs intended to introgress genetic resistance to this pathogen are a major priority to recover the cultivation of lettuce landraces. Principal component analysis (PCA), conducted on all quantitative data, showed a clear differentiation between modern varieties and landraces, mostly related to their commercial weight and susceptibility to B. lactucae. These seem the most important traits influencing farmer and consumer evaluations. Farmers showed a high capacity for characterizing the samples and agreed with consumers when scoring for the external appearance. It is proposed that farmers and consumers should be included in the phenotyping platforms in future research projects aiming for recovery of landraces.

Answer: The Sun

3.1 The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

Explanation:

Answer:

The main energy source for life is the Sun

Explanation:

AUG GGU UGU UAA is an amino acid sequence, which further forms proteins.

Proteins are made up of substances called amino acids. Proteins and amino acids are the components of life. Amino acids are the byproducts of the digestion or breakdown of proteins.

Amino acids are used by the human body to create proteins that aid in dissecting food.

There are mainly 20 types of amino acids. 10 are essential amino acids, while 10 are non-essential amino acids. Our body synthesizes non-essential amino acids, while we have to include essential amino acids in our diet.

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Answer:

A

Explanation:

The cyanobacteria were already there without the oxygen, so that rules out A and a lot of prokaryotes were anaerobic, so that rules out  Finally, Photosynthesis does not require oxygen. Instead, Oxygen is a waste product of it.

What is photosynthesis?

Photosynthesis is a process that occurs in the chloroplast organelle of plant cells. The typical light reaction of photosynthesis takes place inside the thylakoid membrane of the chloroplast. The chief reactants such as water and carbon dioxide participate in the reaction. The water gets oxidized in the reaction to release oxygen as a product. The carbon dioxide gets reduced.

Thus, Photosynthesis is a process that occurs in the chloroplast organelle of plant cells

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Answer:

First passed in 1972, the Clean Water Act (CWA) serves to maintain chemical, biological and physical integrity of the navigable waters of the United States. The CWA made it unlawful to discharge any pollutant from a point source into navigable waters, unless a permit was obtained.

Explanation:

Vital Processes: Cellular respiration and photosynthesis

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Answer:

d

Explanation:

trust me

Answer:

c

Explanation:

Natural selection is the process through which populations of living organisms adapt and change

As a curator of fossils in a museum, if a dealer offers to sell you an excellent specimen of a dinosaur with an age of 231 Ma determined by carbon 14 radiometric dating, you should refuse the offer as it is scientifically impossible

Carbon-14 dating is a reliable technique for dating organic materials up to 50,000 years old. This is the half-life of carbon-14, which decays to nitrogen-14 by beta decay. Carbon-14 dating is not reliable beyond 50,000 years.

As a result, carbon-14 dating may not be utilized to date dinosaur fossils since dinosaurs died out about 66 million years ago, long before the carbon-14 dating method could be utilized.

Therefore, accepting the offer would not only be a waste of money, but it would also be scientifically unsound.

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C. Occupy different ecological niches.

Answer:

If the output work makes the job easier in any way.

Explanation:

The type of molecule is a covalent bond where the carbon has a greater affinity of the electrons than the hydrogen.

A covalent bond has been defined as chemical bond that includes the sharing of the electron pair between the atoms.The pair of each electrons has been know as the bonding pairs and the stable balance of attractive and repulsive forces in between atoms.

The properties of covalent bond has the covalent compounds have low melting points and boiling points and generally the covalent compounds does not contain the electricity. The covalent compounds are  having lower enthalpies of the vaporization as well as fusion.

The covalent compounds has been easily catches the fire and are more flammable in comparison to ionic compounds.The covalent compounds are very soft as well as flexible.The physical properties of covalent compounds are that they have lower melting points and electrical conductivity.

Therefore, The type of molecule is a covalent bond where the carbon has a greater affinity of the electrons than the hydrogen.

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Using radio telescopes, astronomers have found evidence the new matter is forming in the universe, which is what the big bang theory predicted.

Your answer is B

Well since the big bang theory already supports the idea of new matter forming, we are using new technology to prove an existing theory

In this case, we are using new technology to prove existing theories. NOT making new ones, or modifying them.

Answer:b

Explanation:

Answer:

Living things can come from nonliving things.

Explanation:

Both scientists shown that living things can come from nonliving things. Example is; microorganisms can develop from spoiled or bad milk.

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Explanation:

Trophic levels is known as feeding levels in an ecosystem.

Trophic levels is any of the stages involved in the food chain. In an ecosystem, the trophic levels begins with the producer which provides foods from inorganic sources.

Answer:

Position it holds in a food chain

Explanation:

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Answer:

He was the first to lay the foundation on genetics and heredity.Thus,he is regarded as the father of genetics

Explanation:

The second answer from the top

Triacylglycerols are not found in animal membranes.Triacylglycerols are a kind of neutral lipid which is formed from a combination of three fatty acids to a glycerol molecule.

The primary function of triacylglycerols is to store energy within adipose tissue and other lipid deposits of the body. They are used by cells to generate adenosine triphosphate (ATP), the primary source of energy for the body. Triacylglycerols are not found in animal membranes. They are typically located in fat cells beneath the skin and around internal organs.Glycolipids, phosphoglycerides, sphingolipids, and cholesterol are lipids that are found in animal cell membranes. The cell membrane or plasma membrane is a thin, flexible membrane that encloses the cell's cytoplasm and controls the substances that enter and exit the cell.

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