bacteria and laboratory animals are sometimes used by scientists as model organisms when researching cures for human diseases such as cancer.which of the following describes one possible advantage and one possible disadvantage of using bacteria as models to help find cures for human diseases?

The cellular structures include cell nucleus, nuclear pores, genetic material (DNA), cytoplasm, nuclear lamina, cell membrane, mitochondria, cytoskeleton and lysosome. It is an animal cell.

The cellular structures observed in the Figure include cell nucleus (A), nuclear pores (B), genetic material (C), cytoplasm (D), nuclear lamina (E), cell membrane (F), mitochondria (G), cytoskeleton (E) and lysosome (F).

The cell nucleus is an organelle that contains the genetic material (DNA) in eukaryotic cells.

The nuclear pores are little pores in the nuclear membrane that allow the passage of small molecules (e.g., RNAs, transcription factors) by simple diffusion.

The genetic material (DNA) contains the instruction to synthesize all cellular components.

The cytoplasm is an aqueous solution inside the cell, which is mainly composed of dissolved proteins and salts.

The nuclear lamina is a rigid structure located inside the cell nucleus which serves to provide structural support to this organelle.

The cell membrane is a semipermeable lipid bilayer that allows the passage of certain substances in and out of the cell.

The mitochondria are the energetic factories of eukaryotic cells, which act to generate ATP by a process called cellular respiration.

The cytoskeleton is an interconnected network of protein filaments that provides structural support to the cell.

The lysosome is an organelle inside animal cells that contains hydrolytic enzymes used to degrade different substances.

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Answer: The pattern of starch storage is closely related to the distribution of chlorophyll in plants

Explanation:

Chlorophyll is a green pigment that helps plants to absorb light energy and convert it into chemical energy via photosynthesis. Starch, on the other hand, is a complex carbohydrate that is used by plants as a storage form of energy.

Chlorophyll is predominantly found in the chloroplasts of plant cells, which are responsible for carrying out photosynthesis. The chloroplasts are found mainly in the leaves of the plant, where they are exposed to light. Therefore, the highest concentration of chlorophyll is found in the leaves of the plant.

Starch, on the other hand, is synthesized in the chloroplasts of the plant cells during photosynthesis. The starch is then stored in different parts of the plant, depending on the plant species. Some plants store starch in their leaves, while others store it in their stems, roots, or even fruits.

In general, plants that have a high concentration of chlorophyll in their leaves tend to store more starch in their leaves. This is because the leaves are the primary site of photosynthesis and starch synthesis. However, some plants, such as potatoes, store most of their starch in their underground tubers.

Therefore, the pattern of starch storage in plants is closely related to the distribution of chlorophyll, with the highest concentrations of both found in the leaves of the plant. However, the specific pattern of starch storage can vary between different plant species, depending on their individual needs and adaptations.

Answer:

pictures of different ecosystems

Explanation:

i got it right

Answer:

Earth and the sun are a part of the solar system

Answer:

Its B

B. A secondary consumer that obtains its energy from the consumption of animals

Explanation:

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A secondary consumer that obtains its energy from the consumption of animals.

Organisms that consume primary consumers for energy are known as secondary consumers. Herbivores, or species that only consume autotrophic plants, are always the main consumers.

Secondary consumers, however, might either be omnivores or carnivores. Omnivores consume both plant and animal stuff, while carnivores solely consume other creatures. Whatever a secondary consumer may be, it still needs to eat primary consumers to thrive.

Secondary consumers can be found in almost every environment on earth and occur in a wide variety of sizes and shapes. The severe habitats that secondary consumers reside in include icy tundras, parched savannahs, and arctic lakes.

Therefore, A secondary consumer that obtains its energy from the consumption of animals.

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Answer:

cell differentiation

Explanation:

Answer:

Prokaryotic cells have entirely different structures for organizing their DNA, the prokaryotic chromosome equivalent is called a genophore and is localized within the nucleoid region... The structure of chromatin networks is currently poorly understood and remains an active area of research in molecular biology.

Explanation:

Answer:

One significant difference between a sperm cell and the cells in the developing fetus is that a sperm cell is a specialized reproductive cell carrying genetic material from the father, while the cells in the developing fetus are diploid cells containing a combination of genetic material from both the mother and the father. In other words, sperm cells are haploid (containing half the usual number of chromosomes) and are involved in fertilization, while fetal cells are diploid and contribute to the development of the individual.

Answer:

The answer is A

Explanation:

The majority of ATP molecules are produced during the stage of cellular respiration called oxidative phosphorylation, also known as the electron transport chain.

During the electron transport chain, high-energy electrons generated by the previous stages of cellular respiration are passed through a series of electron carriers, ultimately to oxygen. As electrons move through the electron transport chain, energy is released and used to pump protons (H+) from the mitochondrial matrix to the intermembrane space. This creates an electrochemical gradient, with a high concentration of H+ in the intermembrane space and a low concentration in the matrix.

The H+ ions then diffuse back into the matrix through ATP synthase channels, driving the phosphorylation of ADP to form ATP. This process is called chemiosmosis and is responsible for producing the majority of the ATP molecules in cellular respiration.

In contrast, glycolysis only produces a small amount of ATP through substrate-level phosphorylation, and the citric acid cycle produces a small amount of ATP through substrate-level phosphorylation and electron transfer to NAD+ and FAD. Pyruvate oxidation produces a small amount of ATP through substrate-level phosphorylation and electron transfer to NAD+. However, these stages generate electrons and other molecules that are essential for the electron transport chain to produce ATP.

Answer:

The Cell Nucleus

Explanation:

Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or (mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

The cell's genetic material is contained in the nucleus.

Cells, frequently referred to as the "building blocks of life," make up all living organisms, ranging in number from the single cell of bacteria to the trillions in humans.

Each of these cells is a distinct entity enclosed in a cell membrane and containing a viscous liquid substance known as cytoplasm.

The majority of the DNA in human cells is located in a region of the cell called the nucleus. It's referred to as nuclear DNA.

DNA's primary role in a cell is to store the genetic data necessary for an organism to grow, function, and reproduce. Each creature is unique because of the information that is stored in its DNA and can be handed down from one generation to the next.

Therefore, the nucleus of the cell contains genetic material.

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Answer:

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Explanation:

Answer:

B

Explanation:

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Answer:

heterozygous and homozygous recessive

Answer: Introducing an invasive species

Explanation: Since invasive means 'to cause harm' (and because none of the animals/plants there have probably adapted to it around the time of its introduction, it is new after all) this new species is likely to cause a decline to everything in the ecosystem its in

Answer:

Answer:

Both studies support the concept that species operate within a narrow optimum temperature range and are coupled to enzymatic activity.

Explanation:

The studies shown in the question above started from the same concept to establish the scientific experiment and had the same objective related to the investigation as temperature changes in the environment where these organisms live influences the enzymatic activity and, therefore, the functioning of their organism, being able to including modifying the environment around them. In summary, we can say that the studies sought to support the concept that species operate within a narrow range of optimal temperature and are coupled with enzymatic activity.

The amount of matter in the system is constant, and the cycle has a clearly defined beginning and end.

A substance called matter is made up of several kinds of particles, occupies space, and has inertia. The many sorts of particle each have a unique mass and size according to the principles of current physics.

The fundamental building block of the cosmos is the atom. Atoms are referred to be the basic matter units and have a nucleus made up of protons and neutrons with electrons revolving around it. Every component in the periodic table is made up of a unique arrangement of protons, neutrons, and electrons.

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The two methods that allow fish to maintain water balance in saltwater are pumping out salt through the gills and absorbing water into the body by osmosis.

In saltwater, the concentration of dissolved salts is higher in the surrounding water than in the fish's body cells. To maintain water balance, fish have developed two main methods:

1. Pumping out salt through the gills: Fish possess specialized cells in their gills that actively pump out excess salts from their bodies. This process helps maintain a lower salt concentration within the fish's body, preventing dehydration and maintaining water balance.

2. Absorbing water into the body by osmosis: Osmosis is the movement of water from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. Fish have a protective layer of skin that allows water to be absorbed into their bodies while preventing the entry of excessive salts.

By absorbing water through their skin, fish replenish the water lost to the surrounding saltwater, helping to maintain their internal water balance.

These two mechanisms work together to enable fish to survive in saltwater environments. By actively pumping out salts and absorbing water, fish can regulate their internal salt concentration and prevent dehydration, ensuring their overall water balance is maintained.

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The correct order of given waves from most to least energetic is UV-C, UV-B, and UV-A. Thus, the correct option for this question is C.

The frequency of any wave is inversely related to the wavelength. This means that when the frequency of the wave increases, the wavelength decreases. While the relationship between frequency is directly related to the energy.

According to the context of this question, gamma rays have the highest frequency, highest energy, and shorter wavelength, while radiowaves have a shorter frequency, less energy, and the highest wavelength.

Therefore, the correct order of given waves from most to least energetic is UV-C, UV-B, and UV-A. Thus, the correct option for this question is C.

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Answer:

answer is c

Explanation:

I got it right

Because male creatures contain X and Y chromosomes, which are sex chromosomes, the law for dominance does not apply to them and they more susceptible to sex-related genetic diseases than female species.

Males only inherited one X chromosome, hence they only have one chance to receive the "good" allele because females contain two versions of an x-linked allele whereas males only carry one. Males are more likely than females to exhibit X-linked characteristics.

That's because X-linked diseases are typically brought on by a lack of functional copies of a gene found on the X chromosome. Males are born with just one X chromosome. Hence, they just require one malfunctioning .

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Answer:

hope this helps

Explanation:

A monohybrid cross is one that involves only one trait. Here the example is used of stem height in pea plants. Tall plants are dominant to dwarf plants,

Answer:

Two kidneys

Explanation:

Most people have two kidneys, however, it is possible to live a healthy and active life with only one functioning kidney.

Answer:

a. lived in small groups

Explanation:

Answer:

physical, or biological anthropology.

Explanation:

When there is a need to study human kind   through the X-ray of  relationships between human biology, its cultural diversity, and  evolution ,the aspect anthropology for this is Biological anthropology.

Therefore biological anthropology is concerned about how the interaction between the cultural diversity and biological process results in the  adaptations of mankind to different  environments.The influence of these on growth, behaviours, existence.

The primary focus of biological anthropologists is to study in details the concept of  ,mechanism of  variation,  adaptation.and how these lead to evolution and origin of mankind.

Sequel to this ,most evidences for this concept are obtained from the study of fossil materials,study of other related primates to man, and components of functional biology and genetics.

Recent advances in biochemical and electron microscopic techniques, as well as in testing that investigates the genetic relatedness among species, have redefined previously established taxonomic relationships and have fortified support for a five-kingdom classification of living organisms. This alternative scheme is presented below and is used in the major biological articles. In it, the prokaryotic Monera continue to comprise the bacteria, although techniques in genetic homology have defined a new group of bacteria, the Archaebacteria, that some biologists believe may be as different from bacteria as bacteria are from other eukaryotic organisms. The eukaryotic kingdoms now include the Plantae, Animalia, Protista, and Fungi, or Mycota.

If someone does not have freckles, it suggests that their genotype lacks the genetic variants associated with freckle formation. Freckles are a result of the interaction between genetic factors and exposure to sunlight.

The presence or absence of freckles is determined by variations in genes related to pigmentation, specifically the MC1R gene.

The MC1R gene plays a role in regulating the production and distribution of melanin, the pigment responsible for determining skin, hair, and eye color.

Certain variants of the MC1R gene are associated with increased melanin production, leading to the formation of freckles in response to sun exposure.

If an individual does not have freckles, it suggests that they do not carry the specific genetic variants associated with freckle formation. This can be inferred from the absence of freckles in their phenotype.

However, it is important to note that the absence of freckles does not necessarily mean the complete absence of genetic variants related to pigmentation.

There could be other genetic factors influencing their skin pigmentation and melanin production, which may result in different phenotypic traits.

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