4. How do dolphins search for food? How is this unique?

Subsistence, referring to the way people obtain their basic needs, has a profound impact on culture. It influences social structures, division of labor, values, beliefs, and daily practices within society.

Explanation:

From an anthropological perspective, subsistence plays a crucial role in shaping culture. Subsistence refers to the means by which people obtain their basic needs, including food, water, shelter, and resources. The way society meets these needs influences various aspects of its culture.

Subsistence strategies, such as foraging, pastoralism, horticulture, agriculture, or industrialization, determine how people organize themselves socially, their division of labor, and their relationship with the natural environment. For example, nomadic hunter-gatherer societies have different social structures and mobility patterns compared to sedentary agricultural societies.

Subsistence practices also impact values, beliefs, and daily practices within a culture. The methods of food production and availability shape culinary traditions, religious rituals, and social norms related to food sharing and distribution. Subsistence strategies influence the development of technology, artistic expressions, and economic systems within society.

Overall, subsistence is deeply intertwined with culture as it shapes the social, economic, and symbolic aspects of society. Understanding a community's subsistence practices provides valuable insights into its cultural patterns, social organization, and worldview.

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Answer:

B. Year 5.

Explanation:

In 5 years time the turtle population reached the carrying capacity of the  pond. Carrying capacity of pond refers to the population of marine animals such as fishes, turtles etc can live and survive on the natural food available in the pond. If the food is present in large amount, than carrying capacity of the ecosystem is large. In pond ecosystem, the population of turtle decreases because the food is not sufficient to feed the existing population.

Answer:6 years

Explanation:

The statement "Homologous chromosomes are identical copies of each other." is false. Homologous chromosomes are pairs of chromosomes that contain similar genes in the same order, but they are not identical copies of each other.

In diploid organisms, such as humans, each somatic cell contains two sets of chromosomes, with one set inherited from the mother and the other set inherited from the father. These two sets of chromosomes make up the homologous pairs.

While homologous chromosomes carry the same genes, they may have different versions of those genes, known as alleles. For example, one homologous chromosome may carry a version of a gene for eye color that results in blue eyes, while the other homologous chromosome may carry a version of the same gene for eye color that results in brown eyes. These different alleles contribute to the genetic variation observed in individuals.

During meiosis, homologous chromosomes undergo recombination, where genetic material is exchanged between the chromosomes, further increasing genetic diversity. This process results in the formation of gametes (sex cells) with different combinations of alleles.

In summary, homologous chromosomes are not identical copies but rather pairs of chromosomes with similar genes in the same order, contributing to genetic diversity in organisms.

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The structure of fatty acids is a long linear chain composed of many carbon atoms and a carboxylic group in one of the molecules extremes. Among the options, the molecule represented with an F is the correct one.

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Fatty acids compose the lipids and glycolipids.

A fatty acid is a carboxylic acid of lipidic nature.

They are composed of a long linear hydro carbonated chain.

The chain size varies according to the number of carbon atoms composing the chain. There might be from 12 to 24 carbons.

Fatty acids are amphipathic molecules, showing a carboxylic group and a hydro carbonated chain.

COOH group is hydrophilic, while the chain is hydrophobic.

The longer is the chain, the more amphipathic and the less soluble it turns the molecule.

Fatty acids can be

The molecule represented by the letter F is the only one that feets these characteristics. This is a linear molecule, with a COOH group in one of the extremes and a linear chain composed of carbon atoms.

Option F is the correct answer.

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A city could develop a mass transit system that uses energy-efficient vehicles describes a way in which a society could conserve energy. So, the correct option is B.

The law of conservation of energy defined as the “Energy can neither be created nor destroyed but can only be converted from one form to another"

Some benefits of energy conservation are as follows:

Society can conserve the energy by developing a city amass transit system which uses energy-efficient vehicles.

Therefore, the correct option is B.

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Contractile cardiomyocytes receive direct input from the neurons, specifically the autonomic neurons.

This allows them to regulate the contractile strength of the heart according to the physiological needs of the body. The neurons' direct input plays a significant role in the contraction of the heart.

Contractile cardiomyocytes are found in the myocardium, the middle layer of the heart. They are the cells that generate mechanical force, leading to heart contraction. The contractile strength of these cells is regulated by the autonomic nervous system, which modulates heart rate and the strength of contraction through the sympathetic and parasympathetic pathways.

Contraction is initiated by the sinoatrial node (SA node) and propagated through the atrioventricular node (AV node), bundle of His, and Purkinje fibers. These structures are made up of specialized cells known as pacemaker cells that spontaneously generate electrical impulses to drive the heart's contraction. However, the contractile strength of the heart is regulated by autonomic neurons.

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Answer:

\(\boxed {\tt 3}\)

Explanation:

An element only has one type of atom and cannot be broken down by chemical means.

Let's analyze the answer choices.

1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.

2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.

3. This has one type of atoms, so it is an element.  

Therefore the best answer choice is 3.

Answer:

1. Temporal

2. Ecological

3. Mechanical

4. Geographic

Explanation:

Answer:

Ecosystem.

Explanation:

The water-filled pool within a pitcher plant is considered a tiny ecosystem because this water filled pool provides habitat to various organisms. The pitcher plant is a type of plant but also act an ecosystem where most of the organisms live. Due to providing place to various organisms, this plant act as an ecosystem so we can conclude that this pitcher plant is a plant specie as well as an ecosystem and habitat for various organisms.

Answer:

zone 3

Explanation:

Answer:

C

Explanation:

Answer: Bacteriophages (phages)

Explanation:

One of the main arguments that animal rights advocates present is that animals have rights because they are capable of suffering.

What is animal rights?

Animals surely deserve to live their lives freely without suffering and exploitation. Animal rights are moral principles formed in the belief that non-human animals deserve the ability to live as they wish, without being subjected to the desires of human beings. The animal rights movement strives to make the public aware about the fact that animals are sensitive, emotional, and intelligent beings who also deserve dignity and respect.

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The nephron is the filtration unit of the kidney.

It consists of a tubule that is connected with collecting duct at one end and a cup-shaped structure at the other end. This cup-shaped structure is called ‘Bowman’s capsule’. Every Bowman’s capsule contains a cluster of capillaries, called ‘Glomerulus’, within the cup-shaped structure. The blood enters into Glomerulus through afferent arteriole of the renal artery and leaves it through the efferent arteriole. Together, the glomerulus and its surrounding Bowman's capsule are called a renal corpuscle.

Blood enters the glomerulus through a small artery supplying the glomerulus with unfiltered blood called the afferent arteriole. Another vessel, a small artery carrying filtered blood away from the glomerulus, is called the efferent arteriole. These two arterioles play a key role in helping the glomeruli's capillaries perform the process of ultrafiltration.

Nephron starts from Bowman’s capsule and consists of the following parts: proximal convoluted tubule (in the renal cortex), the loop of Henle (in the renal medulla), and distal convoluted tubule (in the renal cortex).

i) proximal convoluted tubules (PCT): it is a proximal part of renal tubules next to Bowman’s capsule. It is lined with microvilli. Maximum reabsorption of water, glucose, amino acids and electrolytes takes place here.

ii) The loop of Henle: It is U shaped middle portion of renal tubules. It is composed of ascending and descending loop. Ascending loop is thick-walled and impermeable to water while the descending loop is thin-walled and permeable to water. The countercurrent mechanism is a crucial role of the loop of Henle.

iii) Distal convoluted tubules (DCT): It is the distal part of renal tubules that lead to collecting ducts. It is similar in structure and function with PCT. Functioning of Nephron:-

1. Filtration: Filtration of blood takes place in Bowman’s capsule from the capillaries of the glomerulus. The filtrate passes into the tubular part of the nephron. This filtrate contains glucose, amino acids, urea, uric acid, salts and a major amount of water.

2. Re-absorption: As the filtrate flows along the nephrons, substances such as glucose, amino acids, salts, and water are selectively re-absorbed into the blood by capillaries surrounding the nephron tube the leadule.

The amount of water re-absorbed depends on the need of the body and also on the amount of wastes to be excreted.

3. Urine: The filtrate which remains after re-absorption is called urine. Urine contains dissolved nitrogenous waste, i.e. urea and uric acid, excess salts and water. Urine is collected from nephrons by the collecting duct to carry it to the ureter.

The nephron is the filtration unit of the kidney.

It consists of a tubule that is connected with collecting duct at one end and a cup-shaped structure at the other end. This cup-shaped structure is called ‘Bowman’s capsule’. Every Bowman’s capsule contains a cluster of capillaries, called ‘Glomerulus’, within the cup-shaped structure. The blood enters into Glomerulus through afferent arteriole of the renal artery and leaves it through the efferent arteriole. Together, the glomerulus and its surrounding Bowman's capsule are called a renal corpuscle.

Blood enters the glomerulus through a small artery supplying the glomerulus with unfiltered blood called the afferent arteriole. Another vessel, a small artery carrying filtered blood away from the glomerulus, is called the efferent arteriole. These two arterioles play a key role in helping the glomeruli's capillaries perform the process of ultrafiltration.

Nephron starts from Bowman’s capsule and consists of the following parts: proximal convoluted tubule (in the renal cortex), the loop of Henle (in the renal medulla), and distal convoluted tubule (in the renal cortex).

i) proximal convoluted tubules (PCT): it is a proximal part of renal tubules next to Bowman’s capsule. It is lined with microvilli. Maximum reabsorption of water, glucose, amino acids and electrolytes takes place here.

ii) The loop of Henle: It is U shaped middle portion of renal tubules. It is composed of ascending and descending loop. Ascending loop is thick-walled and impermeable to water while the descending loop is thin-walled and permeable to water. The countercurrent mechanism is a crucial role of the loop of Henle.

iii) Distal convoluted tubules (DCT): It is the distal part of renal tubules that lead to collecting ducts. It is similar in structure and function with PCT.

The filtration unit of the kidney is known as the nephron. It is consisting of tubule that is linked with a collecting duct at one side and a cup-shaped structure at the other side. This cup-shaped structure is known as‘Bowman’s capsule’.

It is the functional and structural unit of the kidney, it is a  filtration unit of the kidney having glomerulus, and a tubule.

Filtration: Blood filtration is takes place in Bowman’s capsule from the capillaries of the glomerulus.

Reabsorption: When blood filtrate flows along the nephrons, molecules  of amino acids, salts, glucose, and water are by selection re-absorbed into the blood by capillaries.

Secretion:  hydrogen ions and waste ions flows from the capillaries into the renal tubule, this process is known as secretion.

Therefore, nephron is the filtration unit of the kidney.

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Ependymal cells are the cells that line the fluid-filled cavities and create, transport, and circulate the fluid that surrounds the brain and spinal cord in the central nervous system (CNS).

the epidermal cell The cavities of the CNS are lined with ependymal cells. Cerebral Spinal Fluid (CSF) is produced by ependymal cells, which also serve as vital barriers between the CSF and the brain's extracellular space.

The majority of the CSF that fills the ventricles, spinal cord canal, and subarachnoid regions is produced by choroid plexus epithelial cells.

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Answer:

Autotrophs are organisms that prepare their own food through the process of photosynthesis,

heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.

Explanation:

Answer:

Why does sexual reproduction result in offspring with genetic variation?

Summary. Sexual reproduction has the potential to produce tremendous genetic variation in offspring. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.

Explanation:

The sentence "Water satisfies your thirst even better then lemonade does." is best written as "Water satisfies your thirst even better than lemonade does." by changing then to than, option "A".

Sentences start with a capital letter, ends with either a full stop, question mark or an exclamation mark and has a subject and a verb. A sentence also contains a predicate.

Predicate are parts of the sentence that states what the subject is about. Sentences can contain conjunctions such as "than" used for comparison and as a preposition. The word "than" gives a better meaning to the sentence "Water satisfies your thirst even better than lemonade does."

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Answer: b

Explanation: your in summer school to

Answer:

i thing living organ are organ that can live

Answer:

A. by determining changes in the heartbeat.

Answer:

determining heartbreak

Answer:

In most cases, one plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion or cion. The scion contains the desired genes to be duplicated in future production by the stock/scion plant.

Explanation:

Answer:

Explanation:

In most cases, one plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion or cion. The scion contains the desired genes to be duplicated in future production by the stock/scion plant.

there no radius for diagram

Divergent natural selection's effects on populations typically are countered by migration. It has been shown that the balance between migration and selection limits genetic divergence within populations.

Allele frequency is also impacted by natural selection. The prevalence of an allele will rise if it confers a phenotype that makes a person more likely to live or produce more children.

High rates of gene flow can lessen the genetic divergence between the two groups, increasing homogeneity. Migrants alter the distribution of genetic diversity among populations.

When disrupting variables are absent, gene frequencies tend to stay steady from generation to generation. Mutation, among other things, can alter the natural equilibrium of gene frequencies.

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Water snakes in Lake Erie are an example of how migration and natural selection can work against each other.

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Answer:

Botanical classification is the process of grouping plants based on their shared characteristics. The system of botanical classification is hierarchical, with plants being classified into increasingly specific categories.

The basic unit of classification is the species, which is a group of organisms that can interbreed and produce fertile offspring. Species are further classified into genera, which are groups of closely related species. Genera are then grouped into families, which are groups of genera that share certain characteristics, such as the structure of their flowers or the arrangement of their leaves.

Families are then grouped into orders, which are groups of related families. Orders are grouped into classes, classes are grouped into divisions or phyla, and phyla are grouped into kingdoms.

Level 2: To create an accurate account, scientifically significant facts, events, or processes are recognized and provided in detail.

Level 1: Facts, events, or processes are named and briefly described, but it is unclear how relevant they are.

Using a 5X objective and a 10X eyepiece, for instance, results in a total visual magnification of 50X, and vice versa.

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 The magnification of microscope can be made to 50x by adjusting the parameters .

 What is magnification of a microscope?

The capacity of a microscope to create an image of an object at a scale bigger (or even smaller) than its real size is known as magnification. Only when it is feasible to discern more details of an object in the image than when studying the object without the use of a magnifying glass can magnification be effective.

The steps for adjusting the magnification of microscope is given below

Hence, the magnification of microscope can be made to 50x by adjusting the parameters .

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