The percentage of a hunter-gatherer society’s diet provided by hunting versus gathering was mostly determined by _______.
a.
the climate
b.
the types of prey
c.
hunting skill
d.
the size of the human population

Ranching, which involves raising livestock such as cattle or sheep, is typically found in climates that offer suitable conditions for these animals to thrive. The ideal climate for ranching is characterized by moderate temperatures, availability of water sources, and a balance of rainfall and sunlight to support the growth of grasses and other vegetation for grazing.

In general, ranching can be successful in various climate zones, such as temperate, semi-arid, and Mediterranean climates. Temperate climates, found in regions like the central United States, provide a good balance of rainfall and sunlight, allowing for the growth of nutrient-rich grasslands. The moderate temperatures in these areas also allow livestock to be comfortable throughout the year.
Semi-arid climates, such as those in parts of Australia and the western United States, offer ranching opportunities as well. These regions receive limited rainfall, but still provide enough water and vegetation for grazing animals. Ranchers in these areas often utilize innovative techniques, like rotational grazing, to manage the limited resources efficiently and sustainably.
Mediterranean climates, like those in parts of California and southern Europe, can also support ranching. These regions experience mild, wet winters and warm, dry summers. Ranchers in these areas must carefully manage water resources to ensure that livestock have adequate water and grazing land throughout the year.
In summary, ranching can be successful in a variety of climate types, with the key factors being the availability of water and vegetation for grazing animals, as well as moderate temperatures. Ranchers adapt their practices to the specific climate conditions in their region to ensure the well-being of their livestock and the sustainability of their operations.

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Answer: 2 x 2 + 2 x 1 = 6

Answer:6

Explanation:

the asnwer is 6 simple  just multiply but for better explanation those 2 molecules 3 x 2 =6  :)

The epidermis on the aerial parts of the plants is often covered by a waxy layer known as a cuticle which is composed of a compound known as cutin that prevents water loss due to transpiration.

The epidermis is the outermost layer of cells covering the leaves of plants. The epidermis serves the function of protection for the plant's leaves as well as regulates the movement of substances into and out of the plant leaves.

The epidermis of cells is covered by a waxy material known as the cuticle.

The cuticle prevents excessive loss of water from plant cell leaves during transpiration. The main component of the cuticle is the chemical compound known as cutin. Cutin is waxy in nature and consists of polymers of fatty acid esters.

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Complete question:

Assertion (A)- epidermis on the aerial parts of the plants often covered by waxy layer.

Reason (R)- cutin prevents water loss due to transpiration.

A. Both A and R are correct

B. A is correct but R is incorrect

C. Both A and R are incorrect

D. A is incorrect but R is correct

The molecules produced are 2 carbon dioxide molecules, 2 NADH molecules, and 2 Acetyl CoA's. The product of glycolysis is pyruvate which is oxidized to acetyl-CoA and it is acetyl-CoA which enter to mitochondria and takes part in Krebs cycle.

This cycle is also known as Tricarboxylic acid cycle (TCA Cycle) or Citric Acid cycle. It is the main source of energy for cells. It is the larger glucose metabolism where glucose is oxidized to form pyruvate and then oxidized and enters the TCA cycle as acetyl-CoA.

This cycle is the second major step in oxidative phosphorylation. Kreb's cycle occurred within mitochondria and the reactions of the Krebs cycle adds electrons and protons to a number of electron carriers, which are used by the electron transport chain to produce ATP.

For every 1 pyruvate molecule added, the Krebs cycle will produce:

Thus, the molecules produced are 2 carbon dioxide molecules, 2 NADH molecules, and 2 Acetyl CoA's. The product of glycolysis is pyruvate which is oxidized to acetyl-CoA and it is acetyl-CoA which enter to mitochondria and takes part in Krebs cycle.

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The Na+-K+ pump assures that the extracellular fluid (ECF) concentration of sodium remains much higher than the intracellular fluid (ICF) concentration.

The Na+-K+ pump, also known as the sodium-potassium pump, is an integral membrane protein that is responsible for maintaining the concentration gradients of sodium and potassium ions across the cell membrane. It actively transports three sodium ions (Na+) out of the cell in exchange for two potassium ions (K+) into the cell.

The pump utilizes ATP (adenosine triphosphate) as an energy source to power its activity. When ATP is hydrolyzed, it provides the energy required for the pump to undergo conformational changes.

The pump has binding sites for both sodium ions and potassium ions. It has a higher affinity for sodium ions on the inside of the cell, so when three sodium ions bind to the pump, ATP is hydrolyzed, resulting in a phosphorylated intermediate state.

The phosphorylated state of the pump induces a conformational change that allows the sodium ions to be released to the extracellular space. At the same time, the pump's affinity for potassium ions increases, allowing two potassium ions from the extracellular space to bind to the pump.

Binding of the two potassium ions triggers the dephosphorylation of the pump, causing it to return to its original conformation. This conformational change releases the potassium ions into the intracellular space.

The cycle then repeats, continually transporting sodium ions out of the cell and potassium ions into the cell.

By actively pumping sodium ions out of the cell, the Na+-K+ pump helps maintain a higher concentration of sodium in the extracellular fluid compared to the intracellular fluid. This concentration gradient is crucial for various cellular processes such as nerve conduction, muscle contraction, and the regulation of osmotic balance.

Other options such as voltage-gated ion channels, sodium-glucose transporters, and facilitated diffusion carriers do not directly regulate the sodium concentration gradient between the extracellular and intracellular fluid. They may have different functions in cellular processes, but they are not primarily responsible for maintaining the concentration difference of sodium ions between the two fluid compartments.

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Answer:

B

Explanation:

Somatic cells (body cells) are normally diploid, meaning they have complete chromosomes, which is 46 in humans. When they undergo meiosis, they give rise to 4 daughter cells, each with only half of chromosomes than their parent cells, we call them haploid [C is correct]. (23 chromosomes only in humans).

These cells are usually gametes, which are used for reproduction. When 2 of these haploid gametes fuse together, they give rise to a zygote, which is the early form of a baby [A is correct] .

The zygote is diploid, (2haploid=1 diploid), so that the original diploid number of chromosomes in the organism can be retained [D is correct].

The zygote develops into an embryo through another type of cell division, mitosis. This type of division gives rise to 2 daughter cells with the same diploid number of chromosomes, so that the embryo doesn't lose chromosomes in their normal body cells [B is incorrect].

The nematodes possess a simple nervous system, a pseudocoelum, and muscles but they are not strictly pathogenetic. So the correct option is option D.

The body shape of nematodes is bilaterally symmetric, elongated, and typically tapered at either end. Some species have a body cavity called the pseudocoel that is filled with fluid. The pseudocoelum is found in the digestive tract between the body wall and the digestive tract. Nematodes, like arthropods, as well as members of six different phyla, secrete an outer cuticle. This cuticle is regularly molted.

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Answer:

A multicelular organism

Explanation:

You can tell an organism is multicellular because it contains more than one cell. It has many cells that help build the organism.

The process is divided into five stages: the embryonic, pseudoglandular, canalicular, saccular, and alveolar stages. Pulmonary ventilation, external respiration, gas transport, internal respiration, and cellular respiration are the respiratory system's functions.

Energy and structural macromolecules are required during this process to maintain the high rates of proliferation. Glycolysis, the citric acid cycle, and oxidative phosphorylation are the three primary phases of cellular respiration. The citric acid cycle happens in the mitochondrial matrix, oxidative phosphorylation takes place on the inner mitochondrial membrane, and glycolysis happens in the cytoplasm.

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Answer:

jawless fish were earth 's first arthropods

Answer:

B

Explanation:

because my teacher told me

Answer:

Answer: The Environment.

Environmental factors, such as diet, medicines, or exposure to toxins, can change how genes are expressed.

Gene expression is the process through which a gene's information is used to create a functioning gene product, allowing it to produce end products like proteins or non-coding RNA and ultimately have an impact on phenotypes.

Expressivity can be impacted by a number of elements, such as genetic make-up, exposure to dangerous substances, other environmental effects, and age. Penetrance and expressivity both have a range: People who carry the gene may or may not exhibit the trait, and when they do, the trait's expression can take many different forms.

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Answer:

at least one dominant allele

Explanation:

Answer:

D.

Explanation:

That is the definition of theory

The correct answer is, "The cytosolic fibrils obstruct access to the pore and can only be parted by nuclear import receptors."

The nuclear pore complex (NPC) is a selective barrier that permits selective transport of proteins and RNA across the nuclear envelope. The nuclear pore complex enables passive diffusion of small molecules and selective import and export of macromolecules. A macromolecule that needs to pass through the nuclear pore complex must bear a nuclear localization signal (NLS) that allows nuclear import receptors (NIRs) to recognize it.

This allows the NIRs to pass through the pore and deliver the macromolecule to the nucleus. If a macromolecule lacks an NLS, it will not be recognized by the NIRs. As a result, the cytosolic fibrils obstruct access to the pore and can only be parted by nuclear import receptors. Hence, the correct option is, "The cytosolic fibrils obstruct access to the pore and can only be parted by nuclear import receptors."

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Acids help digest proteins by partially denaturing them. In this case, the correct answer to the given question is: partially denaturing them.Acids are involved in the breakdown of proteins in the stomach.

During the digestion of proteins, the acidic environment in the stomach partially denatures them to allow for the enzymes to access the peptide bonds.A denatured protein is a protein that has lost its natural shape and has unfolded or altered its structure. In the presence of an acid, the 3D structure of the protein unravels and becomes partially denatured. This makes it possible for the enzymes to access the peptide bonds in the polypeptide chains, leading to their breakdown and digestion.In conclusion, acids help in the digestion of proteins by partially denaturing them.

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Answer:

b and c

Explanation:

In b you'll be mixing and heating up the sauce creating a new compound from  older components and in c, the ultraviolet lights will change your skin cells.

Answer:

B AND C

Explanation:

Answer:

1, 2, 5

Explanation:

Just did the assignment

People and grass are the biotic factors in the environment shown.

What are biotic factors?

"Biotic factors are the living organisms in an ecosystem. Examples include people, plants, animals etc."

What is an environment?

"Environment can be defined as a sum total of all the living and non-living elements and their effects that influence human life."

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Answer:

1. The protein is synthesized within the cell using the information in the cell's DNA.

2. The protein is folded into its final shape.

3. The protein is transported to the cell membrane.

4. The protein is excreted from the cell, typically with the help of special protein-transporting molecules.

5. The protein is now outside of the cell and can be used for its intended purpose.

Explanation:

The option that is not an important er-resident enzyme that modifies proteins in the secretory pathway is D) Sec61.

The smooth ERare those enzymes that take part in the synthesis of lipids as well as the phospholipids, and they carry out important role in the formation of new cellular membrane.

Some important er-resident enzyme are:

Therefore , option D is correct.

The options for the question are:

A) oligosaccharyl transferase

B) BiP

C) protein disulfide isomerase

D) Sec61

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The cell age and die because of changes in proteins. The correct option is C.

Cells are living units that together form an organism. They contain cell organelles, and the cell organelle performs the carious function of the body. Cells are made up of macromolecules, like protein, lipids, and carbs.

There are various types of cells that perform different functions of the body. Old cells die and new cells are made from the old cells. The old cells die because of a change in the protein structure of protein denaturation.

Thus, the correct option is C. Protein changes.

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The terms to their correct descriptions to review the definitions of infection types are:

- Chronic infection: Infection that persists over a long period of time (e.g., HIV)
- Secondary infection: An example is influenza complicated by pneumonia
- Systemic infection: Infection spreads to several sites and tissue fluids, and may travel via nerves and CSF
- Mixed infection: Several microbes establish themselves simultaneously at the infection site
- Localized infection: Microbes enter the body and remain confined to a specific tissue
- Focal infection: The infectious agent spreads to other tissues from a local site
- Acute infection: Infection comes on rapidly, with severe but short-lived effects
- Primary infection: The initial infection

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Answer:

Mississippian fossils are abundant in portions of the Midwest and South and include vast beds of limestone and marble.

Explanation:

For example, the domed ceiling of the Jefferson Memorial in Washington, D.C., is made of Indiana limestone that was deposited during the Mississippian Period.By the end of the Carboniferous, reptiles had migrated well toward the interior of Pangea. These early pioneers went on to spawn the archosaurs, pelycosaurs, and therapsids of the ensuing Permian period. (It was the archosaurs that went on to spawn the first dinosaurs nearly a hundred million years later.)

Answer:

Movement of a solvent (such as water) into a solution with a higher solvent concentration by means of a semi-permeable membrane (as from a live cell), which tends to equal solute concentrations in the membrane on both sides.

Explanation:

Osmosis, the spontaneous transition, distribution, or diffusion of water and other solvents over a semipermeable membrane. In 1877, a German physiologist, Wilhelm Pfeffer, researched the process, which is important in biology.

Osmosis is the passage of water down its concentration gradient, across a semi-permeable membrane. An everyday example is a plastic wrap in your kitchen: it allows air and water vapor to move across it, but no water or food. The membranes of cells are semi-permeable, too.

Answer:

Missense

Explanation:

"A common and well-known example of a missense mutation is sickle-cell anemia, a blood disease. People with sickle-cell anemia have a missense mutation at a single point in the DNA. "(Biology Dictionary).

Answer:

fungus-like protist

Explanation:

A fungus mostly has those characteristics. Most of them are multicellular eukaryotes -- the exception being yeast, which are unicellular eukaryotes. They can reproduce by spores and are decomposers; they even consume via absorptive feeding!

First, it's definitely not plant-like, as it is a decomposer, and there is no indication that it can produce its own food. It doesn't entirely seem like a fungus either, so the answer is a fungus-like protist.

Answer:

The person above is correct. They should get brainliest.  

Explanation:

Edge 2021

The endomembrane system involves various organelles in eukaryotic cells that are involved in protein synthesis, modification, and transport. A protein moves through the endomembrane system through a pathway known as the secretory pathway.

Here is a detailed explanation of this process: The first step of the pathway begins in the endoplasmic reticulum, where a protein is synthesized and folded. After the protein has been folded, it is transported to the Golgi apparatus, where it undergoes further modifications and is sorted into vesicles that are transported to different destinations.

The protein then enters a vesicle that transports it to its destination, which could be the plasma membrane, outside of the cell, lysosomes, or other organelles.The final step in the pathway is the secretion of the protein to the exterior of the cell through the plasma membrane. This is known as exocytosis. Thus, the secretory pathway is the pathway through which a protein moves through the endomembrane system.

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The type of scientist best qualified to perform genetic engineering to produce more productive seeds in agriculture would be a molecular biologist, the correct option is C.

Molecular biologists specialize in studying the structure, function, and interactions of molecules within biological systems, including DNA and genes. Genetic engineering involves manipulating the genetic material of organisms, which requires a deep understanding of molecular biology principles.

Molecular biologists have the expertise to identify and isolate specific genes responsible for desired traits in crop plants, such as increased productivity or resistance to pests or diseases. They can then modify or introduce these genes into target plants to achieve the desired outcomes, the correct option is C.

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The octameric core is composed of all the following histones H2A, H3, and H4.

What are histones?

Histones are proteins that serve as spools to package

The basic roles of histones are to condense DNA strands and to have an effect on how chromatin is regulated. Chromatin is a mixture of DNA and protein that is found in the nucleus of a cell. This combination is called the nuclear matrix. If chromosomes did not have histones, the unwound strands of DNA would be exceedingly lengthy.

DNA molecules into tight coils, which help condense and fit the DNA into the cell's nucleus. They are the main structural elements of chromosomes.

Histones also regulate gene expression by controlling access to DNA by transcription factors and RNA polymerases. Chromatin is composed of DNA, RNA, and histones.

The octameric core, made up of two H2A-H2B dimers and a H3-H4 tetramer, forms the nucleosome, which is the primary structural and functional unit of chromatin. The octameric core is made up of all the following histones: H2A, H3, and H4.

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