one evolutionary advantage of sexual reproduction is that it creates more genetic variation in a population than asexual reproduction. why might this be an advantage

Answer:

sunlight and water with pigment creates oxygen. I think thats the correct formation Explanation:

Answer:

Lamellae

Explanation:

These lamellae are remnants of osteons whose matrix components have been almost completely recycles by osteoclasts. growth of the bone.

Answer:

No, they only respond to a signal if they have a receptor that can receive the signal.

Explanation:

Answer:

A groundwater system comprises the subsurface water, the geologic media containing the water, flow boundaries, and sources (such as recharge) and sinks (such as springs, interaquifer flow, or wells).

Explanation:

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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Answer:

The correct answer is D.They have stars that may appear to wobble.

Explanation:

Binary star - Wikipediaen.wikipedia.org › wiki › Binary_star

''Astronomers have discovered some stars that seemingly orbit around an empty space. Astrometric binaries are relatively nearby stars which can be seen to wobble around a point in space, with no visible companion. The same mathematics used for ordinary binaries can be applied to infer the mass of the missing companion''

-Wikipediaen.wikipedia.org › wiki › Binary_star

-Edge 2021

Iv'e done this one before.

Answer: The answer is D

:)

Explanation:

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Pregnancy is the period between the conception and birth of the fetus.

We know that the term pregnancy has to do with the period that lies between the conception of the fetus and the birth of the child. This can also be called the gestation period and the gestation period would differ in the various kinds of living organisms that we have.

In this case, we are trying to know the statements about the gestation period that are true below;

Women who gain too much weight during the first trimester should gradually lose weight in the second trimester - True

Iron is the mineral in prenatal vitamins most likely to cause nausea and constipation - False

Pregnant women should aim to consume fish at least two times per week to ensure adequate essential fatty acid intake - True

High-dose vitamin A supplements during pregnancy promote optimal vision in the developing fetus - True

Micronutrient needs increase by up to 50% during pregnancy, whereas calorie needs increase only by about 20% - True

Pregnant women should follow a low-fat diet with 15-20% of calories coming from fat - False

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The correct answer is Dendrite.

A useful analogy is to think of neurons as trees. Neurons consist of three main parts: dendrites, axons, and  cell bodies or cell bodies (see diagram below), which can be represented as  branches, roots, and trunks of a tree, respectively. Dendrites (branch) are where neurons receive input from other cells. The dendrites branch  like  branches toward the tip and  even have leaf-like structures  called spines.

Axons (tree roots) are the starting structures of neurons. When a neuron wants to talk to another neuron, it sends an electrical message, called an action potential, across the  axon. The cell body (tree trunk) contains the nucleus, houses the neuronal DNA, and makes proteins for transport down the axons and dendrites. Both the brain and spinal cord have different types of neurons. They are generally classified based on where they originate, what they project to, and what neurotransmitters they use.

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Aristotle put forth three arguments: faith as a road to charity and modesty, self-control as the most virtuous value, and moral virtue as a mean between two extremes. The second paragraph will provide an explanation of each argument, highlighting Aristotle's perspective on these concepts.

Faith as a road to charity and modesty: Aristotle believed that faith, understood as a deep trust and belief in moral principles, can lead individuals to practice acts of charity and cultivate a modest disposition. Faith provides the foundation for virtuous actions and encourages individuals to act selflessly for the benefit of others.

Self-control as the most virtuous of values: Aristotle considered self-control, also known as temperance or moderation, as the most virtuous of values. He believed that self-control is essential for leading a balanced and harmonious life. It involves restraining impulses and desires, finding a middle ground between excess and deficiency, and achieving moderation in one's actions and behaviors.

Moral virtue as a mean between two virtues: Aristotle proposed that moral virtue lies in finding a mean or middle ground between two extremes. For example, courage is the mean between recklessness (excessive bravery) and cowardice (deficiency of bravery). Aristotle emphasized the importance of moderation and balance in cultivating moral virtues, as they are achieved by avoiding extremes and embracing the virtuous mean.

Overall, Aristotle's arguments highlight the interplay between faith, self-control, and moral virtue as essential components of leading a virtuous and fulfilling life, centered around balance, moderation, and the pursuit of moral excellence.

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Answer:

The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air. The cornea is the fastest healing tissue in the human body, thus, most corneal abrasions will heal within 24-36 hours.

Nuclear reactions do indeed occur in the human body, but the body does not use them.

Explanation:

In sexual both parents are involved

Answer:

True, this layer is often referred to as a, "umbrella" because it filters ultraviolet rays from the sun that are harmful to us.

Answer:

Insulin is protein hormones while enzymes are protein macromolecule

Explanation:

Answer:

proteins

Explanation: i got it on the test correctly

Answer:

The third statement is not true.

Explanation:

Cells release small amount of chemical energy from glucose.

The correct answer is: "Cells release large amounts of energy in the form of heat."

Cells release energy by the process of cellular respiration.

A cell is the smallest unit of a living organism which can have independent existence.

Cells obtain energy by the process of cellular respiration. During cellular respiration, during cellular respiration, the energy stored in glucose is transferred to ATP.

The process of cellular respiration releases energy in cells in small controlled amounts.

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Answer:

Explanation: When the weather is hot and windy plants generally wilt because of the higher rate of transpiration.

Transpiration refers to the mechanism by which water evaporates from a plant's leaves.

The air surrounding the plant generally becomes hot and windy resulting in a faster rate of water loss through the leaves whereas the root struggles to absorb enough water from the soil to balance the water loss through leaves.

As a result, the plant suffers from water deficiency which causes withering and floppiness.

In contrast the rate of transpiration is reduced in cool and quiet weather, lowering the likelihood of water loss exceeding the roots ability to absorb water.

Answer:

limited resources

Explanation:

Resources like infrastructure, land, water, food etc are essential to stay in any area. With limited infrastructure services the living quality of an area degrades. Like wise non availability of resources like water, land (or very costly land due to high demand) also degraded the living condition in any urban area.

We can see here that identifying the stage in the cycle the hormone levels are at their highest and most active, we have:
Box 1: Luteinizing hormone levels high.

Box 2: Progesterone levels high

Box 3: Estrogen levels consistently rise.

A hormone is a chemical substance produced by the endocrine glands in the body.

Luteinizing hormone (LH) levels rise sharply in the middle of the menstrual cycle, which is called the ovulatory phase. This surge of LH triggers ovulation, the release of the mature oocyte from the ovary.

Progesterone levels rise after ovulation and peak in the luteal phase. Progesterone prepares the uterus for pregnancy by thickening the lining of the uterus. If pregnancy does not occur, progesterone levels drop and the menstrual cycle begins again.

Estrogen levels rise throughout the follicular phase, which is the first half of the menstrual cycle. Estrogen levels peak just before ovulation.

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Disruption of microtubule function in neurons, as seen in Alzheimer's disease due to over-phosphorylation of the microtubule-associated protein tau, can lead to structural and functional changes in the affected neurons.

Microtubules play a crucial role in maintaining the structural integrity of neurons, particularly in the axons. Therefore, when microtubules are disrupted, the axon's structure would be affected, while the dendrites would remain relatively normal.

Microtubules are dynamic structures composed of tubulin proteins that provide structural support and facilitate intracellular transport within neurons. In Alzheimer's disease, over-phosphorylation of tau protein leads to the formation of abnormal tau tangles, which disrupt the integrity of microtubules. Since tau is mainly found in axons, the disruption primarily affects the axonal microtubules. Consequently, the axon's structural integrity would be compromised, while the dendrites, which have a different microtubule arrangement, would remain relatively unaffected.

Furthermore, microtubules are critical for axonal transport, the process by which essential molecules, organelles, and vesicles are transported along the axon to maintain neuronal function. Disrupted microtubules would impair axonal transport, leading to the inability to deliver necessary components to the synapses. Synapses are crucial for neuronal communication, and without proper maintenance, the synaptic connections between neurons would be compromised.

Overall, disruptions in microtubule function in neurons, as seen in Alzheimer's disease, can have detrimental effects on the structural integrity of axons, interfere with axonal transport, and ultimately lead to the impairment of synaptic maintenance and neuronal communication.

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Answer:

Multiple alleles of a gene occupy the same locus on the chromosome. Multiple alleles are the alternative forms of the same gene so they influence the same trait. The wild-type allele is mostly dominant over the mutant alleles. The wild type is considered the standard and all other alleles are considered variants.

Answer:

Lichens can be found on rocks, trees, bare dirt, metal, and concrete, as well as in natural and man-made habitats. Because they get all of their nutrition from the air, they are sensitive to pollution, making them valuable as indicator species.

Explanation:

Answer:

D

Explanation:

Adding water

A mutation on an autosome that causes the destruction of the liver will most likely follow an autosomal recessive inheritance pattern.

Autosomal recessive traits are traits that are passed down to generations via the autosomal chromosomes (as opposed to sex chromosomes by some traits) and which need two recessive alleles in order to manifest.

From the description of the mutation in the passage, the mutation can only be a recessive one. This is because the manifestation of the traits is deleterious. Any disease in which the liver gets damaged is deleterious because no human can survive without the liver.

If such a trait is autosomal dominant, no individual within the population would be able to pass the allele across different generations. In order words, the allele for such a disease needs to be in recessive form in order for it to remain within the population.

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Answer:

Proteins and glycoproteins on cell surfaces play a major role in how cells interact with their surroundings and with other cells. Some of the proteins in the glycocalyx of adjacent cells interact to form cell-cell junctions, while others interact with extracellular proteins and carbohydrates to form the extracellular matrix (ECM).

Explanation:

Primary reason steroid hormones usually act slowly is that e. they turn genes on or off and it takes time for gene products to build up or become depleted.

Primary reason why steroid hormones usually act slowly is that they turn genes on or off and it takes time for gene products to build up or become depleted. The receptors for steroid hormones tend to be cytoplasmic proteins that also serve as transcription factors which also requires them to enter the nucleus.

Steroids can also act very quickly, by binding to cell surface receptors, or slowly, by binding to cytoplasmic or nucleic receptors and ultimately activate gene transcription.

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Answer:

Robert Hooke discovered cells

Answer:

Alexander Fleming discover the cell in our body

Answer:

It should be answer C.

Explanation:

The main reason to create SI units was to be able to communicate everyone's results internationally, and because we all you different units, the SI units fixed that.

Hope this helped.

The appropriate labels in the order as shown in the diagram (1, 2, 3) are chromosomes, genes, and DNA. Option b is correct.

In the context of heredity, the appropriate labels in the given diagram (1, 2, 3) are chromosome, gene, DNA. Chromosomes are structures found in the cell nucleus that contain genetic information. Genes, which are segments of DNA, are located on chromosomes and carry specific instructions for the synthesis of proteins and other molecules.

DNA, or deoxyribonucleic acid, is the fundamental molecule that carries the genetic code in all living organisms. This order is consistent with the flow of information in heredity, where DNA within genes is organized into chromosomes. Thus, option b is correct.

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The complete question is:

A teacher uses the diagram below to help him explain hereditary to a group of students. which of these combinations identifies the appropriate labels in the order as shown in the diagram (1, 2, 3)

a.) chromosome, DNA, gene

b.)chromosome, gene, DNA

c.) DNA, chromosome, gene

d.) DNA, gene, chromosome

The evolutionary steps in order are:

1. Vascular non-seed plants evolve

2. Vascular seed plants evolve (gymnosperms)

3. Vascular flowering plants evolve (angiosperms)

4. Non-vascular plants evolve

The correct order of the evolutionary steps is as follows: The first step is the evolution of vascular non-seed plants. These plants possess specialized tissues for conducting water and nutrients but do not produce seeds. Examples include ferns and horsetails.

The next step is the evolution of vascular seed plants, known as gymnosperms. Gymnosperms have vascular tissue and produce seeds that are not enclosed in a fruit. Examples include conifers like pine trees and spruces.

The third step is the evolution of vascular flowering plants, also known as angiosperms. Angiosperms are the most diverse group of plants and produce flowers and fruits. They have specialized structures for sexual reproduction and enclose their seeds within fruits. Examples include roses, apple trees, and grasses.

The final step is the evolution of non-vascular plants, often referred to as bryophytes. These plants lack true vascular tissue and include mosses, liverworts, and hornworts. It is important to note that these evolutionary steps occurred over millions of years, with each group building upon the innovations of the previous group, leading to the diverse plant kingdom we see today.

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