Describe three ways that communities can conserve their freshwater resources.

Fraternal twins are twins or embryos, produced from two different egg and sperm, and genetically distinct.

According to this question, Lucy and Maria as seen in the above image are twins but they look so different. This is because they are products of the different sperms and egg cells. They only shared the same womb.

Crossing over refers to the exchange of DNA (genetic material) between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).

Crossing over occurs during gamete formation so as to enable that genetic diversity occurs between species of an organism.

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The combination of offspring best represents the likely outcome of the cross of 23 black fur and 7 white fur.

Offspring resulting from mating between parents with different traits are called hybrids. The genotype of the offspring is the result of the combination of genes in the sex cells or gametes brought together at conception. One gamete of her was born from each parent.

The Punnett square is a table listing all possible outcomes of a genetic cross between two individuals with known genotypes. An organism that has two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example this genotype is written as BB.

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TASTERS are people that have the pav variant of the gene that codes for a certain receptor (t2r38), which enables them to detect propylthiouracil (prop) at low quantities.

Several research have examined interindividual taste variability and its effects on dietary preferences, nutrition, and health using taste sensitivity to 6-n-propylthiouracil (PROP). For the automatic identification of the PROP taster categories of super taster, medium taster, and non-taster of 84 participants, we applied a supervised learning approach (aged 18–40 years).

The most significant characteristics were the ratings of perceived taste intensity for PROP paper disks (50 mM) and PROP solution (3.2 mM), together with fungiform papilla density.

High estimated values tended to favor ST prediction, whereas low values tended to favor NT prediction. Furthermore, TAS2R38 genotypes (AVI/AVI, PAV/PAV, and PAV/AVI to categorize NTs, STs, and MTs, respectively) were important features.

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Answer:

Fungi will absorb their nutrition through their exterior glands while animals consume their nutrition through ingesting other organisms.  

Differences at the molecular level or in the genes will result in variations in the proteins for which the genes code, resulting in trait variation.

Each child inherits two copies or variants of each gene, one from their mother and one from their father. Because each offspring might inherit a unique mix of gene versions, siblings can exhibit features that differ from one another and from their parents. The right girl has straight hair, whereas the left girl has curlier hair. A gene encodes a particular protein that is involved in the expression of a characteristic. Because proteins perform much of the chemical activity inside the cell, they primarily decide the qualities and whose they are. Another thing to keep in mind is that genes are made up of molecules. Like a spiral staircase, thin threads curled around each other.

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Answer: D, Oscar determines the pressure at different depths of Earth’s crust. :)

Answer: D

Explanation: I do lots of research on her shes awsome she found out radium, uranium, and polonium were in fact radioactive

Answer:

Ecosystem Ecology

Two scientific questions that should be asked in order to elucidate relationships regarding the DNA or traits of the orchids are:-

Question No. 1: What generation do these orchids belong to?

Question No. 2: What is the role of DNA?

A scientific research is a systematic method to investigate and study a particular phenomenon. Scientists often question themselves regarding a specific topic so that they may get a better understanding of the data that is gathered by them.

These scientific questions are very important for the researcher and they help in guiding the researcher. Scientific questions may also help the researcher in establishing cause and effect relationships between distinct variables.

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The correct ordering of the steps in scientific research is given below:

The steps in scientific research refer to the steps or procedures that are followed by scientists in making scientific discoveries that explain observed phenomena.

The steps in scientific research are as follows:

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A baseline concussion test is often performed using a computer for evaluating a player whether someone is concussed.

Testing for concussions measures your brain's recovery from a head injury. Questionnaires or symptom checklists are the main components of most concussion assessments. Concussion exams evaluate your mental agility, memory, focus, awareness, and ability to solve tasks. Your coordination and balance are also tested. One of the methods used to identify a concussion is concussion testing. Concussion tests are used by medical professionals, athletic trainers, and coaches to assess brain function before and after a head injury.

Thus from above conclusion we can say that a baseline concussion test is often performed using a computer for evaluating a player whether someone is concussed.

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Answer:

A. hidden

Explanation:

Many desert plants use allelopathy to minimize competition and to keep other organisms away. This causes a hidden dispersal pattern among the plants, in which they are spaced out and not evenly distributed. Allelopathy is the production of chemical compounds by plants that are toxic or inhibitory to other organisms. These compounds can be released into the soil, where they can affect the growth and survival of other plants. By using allelopathy, desert plants can reduce competition for resources and increase their chances of survival in the harsh desert environment.

only characteristics exhibited by parents can be inherited by kids.

Through genetic inheritance, traits are transmitted from one parent to the next. Both the mother and the father can pass on some traits. Others depend on the characteristics that stand out the most in both parents, whether they are dominant characteristics, and whether these run in the family. Through their genes, parents transmit features or qualities to their offspring, including such eye colour & blood type. There are several illnesses and medical disorders that can be genetically handed down. One trait can occasionally take in numerous versions. Blood type, for instance, can indeed be A, B, AB, or O. Even if your parents don't have the same chromosome, it can still be passed on to you once the chromosome join.

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The adrenal medulla is connected to norepinephrine, also known as noradrenaline, which functions as both a neurotransmitter as well as a hormone.

The correct answer is A

There is evidence that norepinephrine affects a person ’s thinking and focus. Attention deficit hyperactivity disorder (ADHD), depression, & hypotension are a few disorders that can result from low norepinephrine levels (very low blood pressure)

High levels of norepinephrine can also lead to headaches, high blood sugar, and insomnia. They also encourage anxiety, high blood pressure, heart rate, and organ stress. Drug withdrawal, long-term kidney disease, and psychological conditions like PTSD can also result in high norepinephrine levels.

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Answer:

Bears play the role of consumer in a forest ecosystem.

Explanation:

Bears are omnivores, meaning they get their energy from both producers and other consumers.

Bears are another example of consumers. Black bears are omnivores and scavengers, like skunks and raccoons, which means that they will eat just about anything. In a forest community, black bears will eat blueberries, bugs, acorns, and many kinds of nuts.

The bear is a primary consumer as it directly feeds on plants, berries in this case. The bear, when eats rodents, becomes a secondary consumer. Rodents feed on grass, so is a primary consumer.

Bears play the role of consumer in a forest ecosystem.

Consumers are living things that must seek, gather, and consume their food. Customers must eat to refuel or they will perish. Omnivores, carnivores, herbivores, and decomposers are the four different categories of consumers.

Zooplankton, butterflies, rabbits, giraffes, pandas, and elephants are a few examples of primary consumers. Herbivores are the main consumers. Their primary food source is either plants or creatures at the first trophic level of the food chain. Autotrophs are another name for plants.

Primary consumer, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow. At the top of the system are the apex predators: animals who have no predators other than humans.

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Asexual reproduction only involves one organism, sexual reproduction requires both a male and a female organism.

Reproduction is the biological process by which new individual organisms called “offspring” are produced from already existing individuals known as “parents”.

Asexual reproduction - Asexual reproduction refers to the type of reproduction in which only a single organism gives rise to a new individual. It involves processes such as binary fission, budding, fragmentation, etc. The organisms that take part in asexual reproduction have no reproductive systems and therefore is no formation of male and female gametes.

Sexual reproduction - Sexual reproduction involves the fusion of male and female gametes in a process known as fertilization. Fertilization can be either external or internal. Sexual reproduction in plants takes place through pollination in which the pollen grains from the anther of a male flower transfer to the stigma of the female flower.

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Answer:

offspring are identical to the parents

extremely efficient

Vertebrata: Subphylum of Chordata. Chordata is the final animal phylum. All of its members, known as chordates, have a head, a body cavity, and a digestive system.

The notochord is the distinguishing feature of the chordates and plays crucial roles in the development of vertebrates. It acts as a major skeletal component of the growing embryo as well as a source of midline signals that design neighboring tissues.

The great majority of animals, including insects, fish, amphibians, reptiles, birds, mammals, and the majority of crustaceans, have bilateral symmetry.

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The phylum Chordata or subphylum vertebrata is made up of bilaterally symmetrical adult animals with ecto, meso, and endoderm derived tissues and a notochord.

what are chordates?

The phylum Chordata and the kingdom Animalia both have vertebrates as members. The four distinguishing characteristics of animals in the phylum Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a postanal tail. These characteristics all arise at some point throughout animal development. Some of these are only present during embryonic development in certain groups.

Additionally, chordates have a segmented body, triploblastic, bilaterally symmetrical, and coelomic skeleton.

The body design is intricate and distinctive.

Organ systems are the level of organization found in the body.

The notochord, a flexible, rod-shaped structure present in all chordate embryos and in the adult stages of some chordate species, is the source of the name "Chordate," which refers to a group of organisms. It supports the skeleton along the entire length of the body and is situated between the digestive tract and the spinal cord.

The class Vertebrata includes all vertebrates. Vertebrates have all four of the chordates' defining qualities, but they also have derived traits that set them apart from invertebrate chordates. Vertebrata gets its name from the vertebral column, which is made up of distinct bones called vertebrae that are linked together to form the backbone. The notochord, which is only present in the embryonic stage, is replaced by the vertebral column in adult vertebrates.

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Passive transport is the movement of molecules across the cell membrane without the need for the input of cellular energy. This statement is true.

Plasma membranes allow special substances to enter and exit the cell, preventing harmful material from entering and essential material from leaving. Plasma membranes are selectively permeable allowing some substances through while restricting others. If they give up this selectivity, the cell will be unable to fortify itself, and will be wiped out.

Most direct forms of membrane transport are passive. Passive transport is a naturally occurring phenomenon and does not require the cell to expend energy in order to carry out the movement.

Passive transport relies on the second law of thermodynamics instead of using cellular energy such as active transport which drive the movement of substances across cell membranes.

Thus, Passive transport is the movement of molecules across the cell membrane without the need for the input of cellular energy. This statement is true.

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Some trees' leaves change colour in the fall. Because of the breakdown of chlorophyll, the auxiliary pigments are now visible. This is caused by ethylene hormone.

The multifunctional hormone ethylene is thought to control both growth and senescence. Depending on the concentration, timing, and species of the plant, it either promotes or inhibits the processes of growth and senescence.  aids in identifying a flower's sex. In a male plant, it contributes to the development of female flowers.

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The total range of energy that reaches the Earth from the sun is called solar radiation.

The electromagnetic radiation spectrum, which encompasses a broad range of energy, includes solar radiation, which is how the Sun's energy travels from the Sun to the Earth. Sunlight emits radiation in a variety of wavelengths, such as infrared, radio waves, X-rays, gamma rays, ultraviolet light, and visible light.

An all-encompassing term for the electromagnetic radiation that the sun emits is solar radiation, also known as sunlight or the solar resource. Numerous technological techniques can be used to absorb solar energy and convert it into usable forms of energy, like heat and electricity.

As a result of solar radiation heat, the earth's surface warms. Since the earth emits energy into space and the atmosphere, the average temperature of the planet does not change.

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Answer: c. asexual reproduction

Answer:

C

Explanation:

in exact binary fission

Answer:The nucleus

The nucleus (plural, nuclei) houses the cell's genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.

Explanation:These cells are different because they use the same set of genes differently. So even though each of our cells has the same 20,000 or so genes, each cell can select which ones it wants to “turn on” and which ones it wants to keep “turned off”.

The answer is G1 stands for Gap 1 phase

                        S stands for Synthesis phase

                       G2 stands for Gap 2 phase and

                        M stands for Mitosis phase.

What is interphase?

The eukaryotic cell cycle's interphase phase is the longest. The cell gathers resources, makes and utilizes proteins and other substances, and initiates cell division by reproducing its DNA during interphase. Three separate stages—Gap 1, Synthesis, and Gap 2—makeup Interphase.

G1 Phase- The cell physically expands, duplicates organelles, and produces the molecular building blocks it will require in subsequent processes.

Synthesis Phase-Inside of its nucleus, the cell creates a full duplicate of the DNA. A centrosome-like structure that organizes microtubules is also duplicated. DNA is separated during the M phase with the aid of the centrosomes.

G2 Phase-As it becomes bigger, produces more organelles and proteins, and gets closer to mitosis, the cell starts to rearrange its internal structure. Mitosis starts when G2, the growth phase ends.

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Action potentials from receptors involved in general sensations are interpreted in the Primary sensory cortex.

Primary sensory cortex is a part of the somatosensory system and it is located in the parietal lobe of the brain. The primary sensory cortex plays a crucial part in the processing of afferent somatosensory input. It also has a major role in integrating sensory as well as motor signals that are essential for skilled movement.

Through such a sensory route, the brain may distinguish between different visual stimulation because action potentials produced by sensory receptors flow along neurons that have been specifically tuned to just that input. Such neurons synapses with specific neurons inside the brain as well as spinal cord and are specialised to that specific stimulus..

The question is incomplete. The complete question is:-

Action potentials from receptors involved in general sensations are interpreted in the:

1) Premotor cortex,

2) Primary sensory cortex,

3) General interpretive area,

4) Mesencephalon.

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Codons are three letter genetic words: and the language of genes use 4 letters (=nitrogenous bases). Hence 64 words are there in genetic dictionary, to represent 20 amino acids that the biological organisms use.

And you must note that more than one codon may code for the same amino acid. This is referred to as degeneracy of the code. For example, three amino acids are coded by any of six different codons, and that alone uses up 18 of the 64 combinations. Three of the codons are stop codons. They do not code for any amino acid. Instead, they act as signals to end the genetic message carried by messenger RNA.

A stop codon is a trinucleotide sequence of three nucleotides found in messenger RNA (mRNA) or DNA that instructs the cell to stop production of proteins. There are 64 distinct trinucleotide codons, of which 3 are stop codons and 61 define amino acids (i.e., UAA, UAG and UGA). A stop codon (or termination codon) is a codon (nucleotide triplet within messenger RNA) that marks the end of the current protein's translation process in molecular biology, more specifically in protein biosynthesis.

The number of amino acids coded by codons is

1 codons ×2 amino acids = 2 codons

2 codons ×9 amino acids = 18 codons

3 codons ×1 amino acid = 3 codons

4 codons ×5 amino acids = 20 codons

6 codons ×3 amino acids = 18 codons

3 stop codons

Total = 64 codons

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The muscle group that helps the prime movers and protects from unwanted movements are known as synergists.

Muscles are the mass of loose tissues that mediate the movement of the entire body as well as the internal organs. There are three types of muscles in human body: skeletal muscles, smooth muscles and cardiac muscles. The skeletal muscles are voluntary in nature while the smooth and cardiac muscles are involuntary.

Synergists are called as the fixator muscles. They perform their function on movable joints. They are also called neutralizers because the neutralize the functions of agonist muscles. For example, brachioradialis and brachialis act as the synergists when flexing of the forearm is done.

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Girls and women normally have two X chromosomes (46,XX karyotype), whereas boys and men typically have one X and one Y chromosome (46,XY karyotype ).

22 sets of autosomal chromosomes and one set of sex chromosomes make up the average human karyotype. Two X chromosomes are present in the most prevalent karyotypes for females, which are designated as sex XX. The X and Y chromosomes, which are referred to as XY in the case of males, are often present.

There have been a small number of reports of 47,XXY individuals with a feminine phenotype. These people exhibit favorable SRY (testis-determining factor). This phenomenon's genetic cause is not fully understood. Case: A woman, 34, who had a 47,XXY karyotype and testicular feminization, appeared.

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A variety of American warbler species frequently coexist on the same spruce trees and feed on caterpillars. But each species has a somewhat varied reproductive season, and each species prefers various parts of the forest canopy to graze in. These differences in foraging behaviors and reproduction is an example of (b) character displacement.

Character displacement refers to an evolutionary shift that happens when two closely related species coexist in the same habitat. Natural selection is more likely to encourage divergence in an organism's morphology, ecology, behavior, or physiology under such circumstances.

Character displacement is a sort of coevolution that occurs when two or more competing species develop in reaction to one another. A group of coexisting finches, for instance, had drastically diverse body and beak proportions as well as beak morphologies in the Galapagos Islands.

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