Lactose is composed of: a. galactose joined with fructose. b. glucose joined with glucose. c. galactose joined with glucose. d. fructose joined with glucose.

The Davison–Daniella model dominated until Singer and Nicolson advanced the fluid mosaic model in 1972. The fluid mosaic model developed on the Davison–Daniella model by including transmembrane proteins and destroyed the previously-proposed flanking protein coatings that were not well-supported by empirical evidence.

Hugh Davison and James Daniella presented the Davson-Danielli model, often known as the unimolecular model, in 1935 as a representation of the plasma membrane of a cell. The trilaminar and lipoprotinious phospholipid bilayer that lies between two layers of globular proteins is depicted in the model.

Singer and Nicolson created the fluid mosaic theory in the early 1970s. This paradigm states that lipids, proteins, and carbohydrates make up membranes. Phospholipids are the primary components of lipid membranes. Up until Singer and Nicolson introduced the fluid mosaic model in 1972, the Davson-Danielli model predominated. Transmembrane proteins were included to the fluid mosaic model, which was built on the Davson-Danielli model, and thus eliminated the previously hypothesized flanking protein coatings, which were not well supported by empirical data.

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Answer:

The correct answer is A

Explanation:

The organism that lacks a cell wall is:

E) Mycoplasma.

Among the given options, Mycoplasma is the only organism that lacks a cell wall. Mycoplasma is a genus of bacteria that belongs to the class Mollicutes. Unlike other bacteria, Mycoplasma does not possess a rigid cell wall made of peptidoglycan. Instead, it has a flexible cell membrane that surrounds its cytoplasm.

The rest of the options (A) Clostridium, (B) Mycobacterium, (C) Nocardia, and (D) Borrelia, are all bacterial genera that have cell walls. These cell walls are typically composed of peptidoglycan, a complex molecule that provides structural support and protection to bacterial cells.

It is important to note that the absence of a cell wall in Mycoplasma allows for its unique characteristics, such as its ability to adopt varied shapes and its resistance to certain antibiotics that target cell wall synthesis.

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In the origin of life, nucleotides were polymerized to form nucleic acids and amino acids were polymerized to form proteins.

Polymers are large chemical substances formed from smaller chemical substances called building blocks or monomers. They are formed by polymerization reactions.

Both nucleic acids and proteins are polymers. While nucleic acids are formed from monomers known as nucleotides, proteins are are polymers formed from amino acids.

Nucleotides are linked by covalent bonds to form nucleic acids while amino acids are linked together by peptide bonds to form proteins.

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Answer:

receptor molecules.

Explanation:

Receptor molecules are the glycoproteins that binds specifically to a hormone or nerve signal and bring change in the cell activity and function.

:)

Answer:

Fossil Succession

Explanation:

PCR testing is the best method for fetal DNA typing due to its specificity, sensitivity, speed, and ability to detect specific genes. However, it requires specialized equipment and trained personnel.

PCR (polymerase chain reaction) testing is considered the best method for fetal DNA typing for several reasons, but not all the options listed in the question are accurate.

Firstly, PCR testing is highly specific and sensitive, which makes it a reliable method for detecting fetal DNA in maternal blood.

This is important because traditional methods for fetal DNA typing, such as amniocentesis and chorionic villus sampling, are invasive and carry risks for the mother and fetus.

PCR testing, on the other hand, requires only a small sample of maternal blood and can detect fetal DNA with a high degree of accuracy.

Secondly, PCR testing is relatively fast, with results typically obtained within a few days. This allows for early detection of fetal genetic abnormalities or other conditions, which can be critical for treatment decisions and parental planning.Thirdly, PCR testing is a highly standardized and automated process, making it relatively inexpensive and widely available.

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The energy is stored in the bonds that hold the ADP molecule together. The cell can only use ATP as a form of energy.

ADP is the molecule that will turn out in ATP, is the backbone of Adenosine triphosphate (ATP).

The ATP have 3 phosphates in the molecular structure, ADP have 2 phosphates, that phosphate means the realese of energy.

The ATP is the primary energy molecule of the cell, when it breaks in ADP the bond that link the phosphate 3 with the other 2 and 1 in the structure releases energy to cell's work.

Answer:

A Dolphin and a Spider

Explanation:

Non-human organisms are animals other than the Homo sapiens species. Whales and crocodiles are examples of non-human organisms.

Non-human organisms are the species of the kingdom Animalia that are apart from the Homo sapiens species but can be a mammal, amphibians, reptiles, aves, etc.

The whale and monkeys belong to a mammalian class, whereas crocodiles are reptiles. They are not primates and do not belong to the genus Homo that classifies humans.

Therefore, Whales and crocodiles are examples of non-human organisms.

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Eugenics is the controversial use of science and breeding to improve the genetic components of a species, option C is correct.

Eugenics refers to the controversial practice of using scientific principles and selective breeding to improve the genetic characteristics of a species. It involves the promotion of certain desired traits while discouraging or eliminating undesirable traits from the gene pool.

The aim of eugenics is to enhance the overall genetic quality of a population or species by controlling reproduction and inheritance. It has historically been associated with attempts to create a "superior" or "perfect" human race, which has raised significant ethical concerns and has been widely criticized for its discriminatory and harmful consequences, option C is correct.

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The complete question is:

Eugenics is the controversial use of science and breeding to do what?

A. Bring therapeutic restoration of an impairment from disease or injury.

B. Clone an exact copy of a specific animal or

human.

C. Improve the genetic components of a species.

D. Assist couples with infertility through use of IVF.

Solution:

The correct answer is:

The answer lies in the resistance to antibiotics that occurs with this bacterium. Indeed, Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a type of staph bacteria that's become resistant to many of the antibiotics used to treat ordinary staph infections. This makes infections with this bacterium dangerous, as most antibiotics are given seem not to work in patients infected with this bacterium.

Answer:

There are three different types of adaptations: Behavioural - responses made by an organism that help it to survive/reproduce. Physiological - a body process that helps an organism to survive/reproduce. Structural - a feature of an organism's body that helps it to survive/reproduce.

Explanation:

Answer:

Explanation:

It cannot be predicted with certainty how snakes might look in future rock layers, as evolutionary changes can be unpredictable and depend on a wide range of factors, which are specified below.

Evolutionary changes are the changes in morphology or physiology of an organism due to changing environmental conditions over time and are inherited to their offspring for increasing the chances of survival.

The  few possible scenarios that could lead to changes in snake morphology over time:

The timescales involved in evolutionary change are often very long, so any changes to snake morphology that occur in the future may not be visible in the rock layers for many millions of years.

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Explanation:

Earthquake waves produces two very important waves that useful in studying the composition of the earth.

These waves are P and S-waves.

Using these waves we can know the composition of the earth.

Answer:

phospholipids

Explanation:

The fundamental building blocks of all cell membranes are phospholipids which are amphipathic molecules, consisting of two hydrophobic fatty acid chains linked to a phosphate-containing hydrophilic head group.

Answer:

I think it is C 10percent.

Explanation:

All of the aforementioned mRNA alterations are frequent in human cells. Exon joining, intron removal, and 5' cap addition Alternative 3' methacrylate tail addition splicing.

A human body has many billions of cells. They just provide body its framework, take in nutrients from food, convert those nutrients into energy, and carry out certain functions. In addition to having the ability to replicate themselves, cells also contain the organism's genetic material.

The average human body contains 100 trillion trillion cells. In a new mega science project, every one of the 80 known organs' 200 or more different types of cells will be catalogued, imaged, and their active genes will be determined.

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Natural selection is an evolutive force that act on populations when different selective pressures affect them. It increases the frequency of beneficial alleles. A. Natural selection is a way for evolution to occur. B. Natural selection results in better adapted populations when the environment is constant.

Natural selection is an evolutive force that leads to evolution. It selects beneficial alleles and increases their frequency in the population.

Natural selection favors an allele or acts against it, depending on the influence the allele has on the individual's fitness.  

Better fitness is reflected by the phenotype that leads to higher survival, fertility, and reproductive rates. Aptitude -fitness- must be significant to the natural selection act in its favor.

Adaptation, achieved by natural selection, is closely related to selective pressures.

Selective pressure is applied by different varying organisms or conditions that influence the survival rate of a certain phenotype.

A. Natural selection is a way for evolution to occur ⇒ True. It leads to evolution.

B. Natural selection results in better adapted populations when the environment is constant ⇒ True. Once individuals has been affected by natural selection, they are adapted to certain contant conditions. Whenever environmental conditions change, natural selection must act again to re-adapt individuals.

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Answer:

See the answer below

Explanation:

A researcher performed an experiment in which he exposed young corn plants to a harmless, radioactive form of carbon dioxide gas containing carbon-14 instead of carbon-12. he then began feeding corn produced by the plants to a small group of goats. after several weeks, the researcher took blood and tissue samples from the goats. he was able to detect increased concentrations of carbon-14 in the goats' lipids, proteins, carbohydrates, and dna. which statement best explains the researcher's findings?

a. uptake of radioactive carbon dioxide gas caused carbon atoms to be found in places they wouldn't normally be found.

b. carbon atoms found in the sugar molecules of the corn were used by the goats' bodies to form other large molecules.

c. like the corn plants, the goats experienced prolonged exposure to carbon dioxide gas containing carbon-14.

d. eating corn containing radioactive carbon-14 caused many of the goats' other carbon atoms to become radioactive.

The correct answer here would be that the carbon atoms found in the sugar molecules of the corn were used by the goats' bodies to form other large molecules.

This is usually what happens when organisms feed on nutrient-containing substances. The nutrients are extracted during digestion and are utilized in the anabolic processing of important biomolecules in the body of the organism.

Carbon is an important element in all biomolecules of life such as lipids, proteins, nucleic acids, etc. and as such, the carbon present in the corn consumed by the goats must have been used to form some of these molecules in the bodies of the goats.

The correct option is b.

Answer:

gravity,friction and motion

The forces of nature that affect our daily/monthly/seasonal basis include weather, gravity, and the rotation and revolution of the Earth, which affect the temperature, precipitation, and daylight hours.

The forces of nature refers to the fundamental forces that govern the behavior and interactions of matter and energy in the universe. The four known fundamental forces of nature are:

-Gravity: the force that attracts two objects towards each other proportional to their mass.

-Electromagnetism: the force that governs the behavior of charged particles and the interaction of electric and magnetic fields.

-The Strong Nuclear Force: the force that holds the protons and neutrons together in the nucleus of an atom.

-The Weak Nuclear Force: the force responsible for certain types of radioactive decay.

These forces are fundamental in the sense that they cannot be broken down into simpler components. They are also different from the forces that we experience in our daily lives, such as friction or tension.

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Answer:

it looks most similar to the cow

Explanation: just cause it looks like the hog, but slightly fatter

Answer:

I think it's the calf, but I am not sure.

Explanation:

I say this because:

1) They look very alike

2) They both seem like they have common features

Therefore, I think the answer is calf but I am not sure.

Hope this helps! :D

Answer:

An organ

Explanation:

An organ can be defined as a collection of similar types of tissue which perform the similar perfect function. The main function of the root is to collect nutrients and water from the soil.

As a result of this the root are modified in such a way that their surface area is increased and are modified in a way so that they can observe water in a better way. This is done by change in the molarity of the solution which are present in the root hair cells.

Answer: It is an example of an Organ

Answer:

A. Turtles and birds

Explanation:

Turtles use their shells to protect themselves from predators and birds use flight to escape

If a sperm cell contains 8 chromosomes, it comes from an animal that has 16 chromosomes.

This is because the animal's sperm cells and egg cells (also known as gametes) contain half the number of chromosomes as the animal's somatic cells (also known as diploid cells). During fertilization, the sperm cell and egg cell combine to form a zygote, which contains the full complement of chromosomes for the animal. For example, a human sperm cell contains 23 chromosomes, and a human egg cell contains 23 chromosomes, for a total of 46 chromosomes in the fertilized egg.

It could be a plant cell or an animal cell