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The answer is the letter B. Electrical signals.

*Our brain and body communicates with each other by sending messages in the form of electrical signals.

L and B are 4 unites apart. Considering the cross, they are only 4% of the recombinant types.

To answer this question we need to remember a bit of the earth's history. In the first stages, Precambrian, on earth, there was no oxygen, nonetheless with the rise of photosynthesis by cyanobacteria the concentration increased, nonetheless it was a gradual process, now also there was an increase in carbon dioxide levels at the end of the Mesozoic due to intense volcanic activity along with other factors. So taking this into consideration we can say that the correct answer is the third option, as a volcano is a sudden event and if large enough maybe it won't change all the atmosphere, but can generate a local change.

The types of transport can be classified into two groups: passive transport and active transport.

The deforestation of rainforest ecosystems for logging and farming has had a direct effect that is desertification of the areas.

The deliberate clearance of forested terrain is known as deforestation. Forests have been cleared throughout history and into the present era to make room for agriculture and animal grazing as well as to obtain wood for fuel, manufacture, and construction. Around the world, deforestation has significantly changed the terrain.

A variety of issues for Indigenous people can result from the loss of trees and other vegetation, including climate change, desertification, soil erosion, less crops, flooding, and an increase in greenhouse gases in the atmosphere.

Agriculture expansion, wood extraction (such as logging or harvesting wood for domestic fuel or charcoal), infrastructure growth such as road construction, and urbanization are the direct causes of deforestation.

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The scientific name of this species is Lycosidae.

Wolf spiders are hairy, range in size from around half an inch to two inches, and typically have different markings or strains of brown to gray hue. Mother wolf spiders carry their bulky egg sacs around with them. When the spiderlings hatch, they climb onto their mother's back and travel until they are about halfway grown.

Wolf spiders have developed the ability to survive in almost any place. While some species live in volcanic lava tubes, others are found on cold, stony mountaintops.

Ecosystems - Birds, reptiles, and rodents make up the prey of wolf spiders. Food web - Spiders are carnivorous creatures that eat a variety of creatures. They prey on specific types of top consumers. Spiders are therefore secondary buyers.

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Jaws are common between chondrichthyans or cartilaginous fishes and Osteichthyes .

Cartilaginous fishes have skeletons composed  of cartilage while bony fish have a skeleton composed of bone. Cartilaginous fish are grouped under the class Chondrichthyes and all bony fish fall under the superclass Osteichthyes.

Chondrichthyes are jawed vertebrates they also have paired fins , scales, and chambered heart. Osteichthyes or bony fishes, which have structure primarily composed of b.one tissue and jaws are also present .

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mRNA of the mutated DNA: UGACUGCAGCUU (in bold is the second codon)

If the mRNA has a mutation by a deletion on the first base pair of the second codon, the sequence produced will be UGA-UGC-AGC-UU. The second codon is originally CUG but with the deletion, C is left out.

ANSWER: B.

To answer this question we need to remember come concepts first, cloning implies that an identical genetic individual is created, meanwhile, selective breeding means that only the members of a population that exhibit the desired trait will be crossed, which left us hybridization, this involves a cross between species or varieties, therefore this is the correct answer (option B).

Hybrid organisms are considered as heterozygous.

The phenotypes of the cross of two heterozygous black mice are shown above. BB and Bb have black fur. bb which is considered as recessive have white fur. Homozygous recessive only show the recessive phenotype.

Pueraria Lobato, also known as kudzu, is a vine that occurs in the USA. This is an invasive species, so it is not from the U.S.. Therefore, it is a nonnative species.

The correct answer is A. A nonnative species

The butterfly begins its life as a larva or a caterpillar. A caterpillar molts as it grows. When it reaches its full size, it forms into pupa and undergoes metamorphosis where the butterfly begins to form. A grasshopper however, is an insect that undergoes incomplete metamorphosis where it hatches from an egg and goes through the three nymphal stages. Each of the nymphal stage shows a smaller version of the insect and becomes larger as it grows. The third stage will show the adult form of the grasshopper.

Species that are extinct are species that no longer has any specimen alive anymore, which means that this living beings won't ever be present on Earth again. But it doesn't happen out of nowhere. The species goes through some of all of those definitions, as a warning that we must act to avoid extinction. As vulnerable are species that are facing a high-risk, but stil it isn't an imminent risk, so C it's not the closest. Threatened are species that are likely yo become endangered, not extinct, so D isn't the answer as well. Special concern are species that aren't even threatened or endangered yet, so E isn't the answer too. Endangered species are facing an imminent danger of becoming extinct, but still being extirpated may be even more concerning, because extirpation can be a consequence of overlooking a situation of endangered species and it is also a way in which a species can be extinct (they tend to disappear from specific areas until there are no more areas where they can be found anymore). So, the correct answer is a) Extirpated.

Abiotic factors are components of environment that are not living. Examples are water, soil, minerals, and nutrients.

ANSWER: Rocks.

Answer: rocks is correct

Explanation: penn foster answer

The two major parts of the earth system that this photo most clearly shows are the lithosphere and hydrosphere.

Earth systems refer to the various systems of the earth that compose the earth.

The major earth systems are as follows:

Lithosphere - this is the hard layer of the earth which includes the earth's crust such as deserts, mountains, etc.

Hydrosphere - this is the earth system that is composed of water such as the oceans, rivers, streams, etc.

Atmosphere - this is the earth's system that is composed of the layers of gases above the earth's crust.

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Answer: Geosphere and Hydrosphere

Explanation:

Non-vascular plants do not possess xylem or phloem because they do not have water-conducting tissue. They cannot carry water and absorb directly by means of their leaflike scale. So that fertilization will occur in a vascular plant, the sperm must swim in a drop of water from antheridium to an egg in an archegonium.

Answer - Option C - have tiny seeds that can only travel short distances

They also do not possess seeds. They possess roots to be able to absorb water and minerals.

According to FDA, there are four areas to look out for. These areas are (1) the serving information or serving size, (2) calories or amount per serving, (3) nutrients, and (4) the % daily value.

Serving information or serving size is the first you look up. It tells you the average amount a person c

Some organisms modified with CRISPR technology are not considered transgenic because the CRISPR genes do not become part of the genome of the organism that is being modified, being only a vehicle of the information and not a new gene for the organism.

In the question the options that are density-dependent factors (biotic factors) are:

- Disease;

- Predation;

- Competition for food;

- Competition for light.

All the other options are abiotic factors that can happen by events related to the geography and climate of the habitat.

Answer:

Heterozygous alleles

Explanation:

The root "hetero" means "different". Any pairing of alleles that contain both a dominant allele (R) and a recessive allele (r) is considered to be heterozygous. (Rr)

Similarly, the root "homo" means "same", indicating that any pairing of alleles that contains either two dominant alleles (RR) or two recessive alleles (rr) is considered homozygous.

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The notation Rr in geneticists refers to heterozygous alleles. Therefore, the correct statement is in option A.

The notation Rr indicates that an individual has two different alleles for a particular gene that is inherited from each parent. The uppercase R indicates a dominant allele, whereas lowercase r indicates a recessive allele.

The notation Rr represents the individual in a heterozygous state for that gene, where one allele is dominant and the other allele is recessive. The dominant allele (R) masks the expression of the recessive allele (r), resulting in the expression of the dominant phenotype.

Rr genotype helps in understanding the patterns of inheritance and the probability of traits appearing in offspring. In this case, the dominant allele will express the phenotype of the organism, while the recessive allele will not be expressed in the phenotype of an organism.

Therefore, the notation Rr in geneticists refers to heterozygous alleles.

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Transitional species are the species that are considered as intermediate. They are the species in between two contrasting species.

Archaeopteryx is considered as a transitional species because their fossils are in between dinosaurs and modern birds. Tiktaalik are also considered as transitional species because they are in between fish and and early tetrapod.

Transitional species supports the theory of evolution. The fossils found are considered as evidence for evolution. Transitional fossils are debris of species that are present in between ancestral species and modern species.

Answer - Options 1, 2, 3, and 4.

The last option is not correct. Transitional species does not contradict the theory of evolution. It supports the theory of evolution. Transitional fossils are evidence for evolution. Transitional fossils are debris of species that are present in between ancestral species and modern species.

The fourth correct answer is that sedimentary rock is where fossils are most frequently found.

The preserved remnants of animals and plants that were submerged in sediments like sand and mud beneath ancient seas, lakes, and rivers are known as fossils. Any preserved sign of life that really is typically older than 10,000 years is considered a fossil. Any surviving remains, impression, or evidence of a once-living thing from such a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe imprints in stone, amber-preserved artifacts, hairs, petrified woods, oil, coal, and DNA traces.

According to State of New York Geological Survey, fossils are made through a variety of various chemical and physical processes. Whole-body fossils can be formed by freezing, drying, and encasing in tar or resin to preserve bodily tissues. The first dinosaurs bone was reportedly found in 1677 by Robert Plot, who initially thought it belonged to a huge human. The first geology professor at Oxford University, William Buckland, was the one who first accurately recognized a dinosaur fossil as such.

Sedimentary Rocks: Rocks that are produced from previously existing rocks or fragments of once-living organisms are known as sedimentary rocks. They emerge from deposits that amass on the Earth's surface. Identifiable bedding or layering is typically present in sedimentary rocks.

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Answer:

D) sedimentary rock

When the DNA or RNA sequences are altered, the resultant amino acid can occasionally change as a result. A completely new sequence of amino acids may be produced as a result of how the ribosome interprets the mRNA sequence.

The amino acid sequence of the protein that the gene codes for can be altered by changes to the DNA sequence of that gene, a process known as mutation. A single DNA letter can change in a point mutation. They can be divided into three categories: Missense mutations alter a protein's single amino acid. DNA sequence modifications are known as mutations. Viral infection, mutagen exposure, or errors in DNA replication during cell division can all lead to mutations.

As a result, option C, which reads: "A change in the DNA sequence affects the RNA sequence, which occasionally results in a change in the resultant amino acid," is the right statement.

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The movement of water in celery happens because of the capllary action in the xylem, the water moves up from the roots through the stem and into the branches and leaves. Therefore, the answer for the question is A (the water would be flowing upwards towards the leaves).

As we know the virus known as SARS-CoV 2 belongs to the family of coronavirus, this means that is a monocatenary RNA virus which confers it a high mutation rate, as was a new type of virus there was no antiviral known to be effective or vaccine which leads to catastrophic consequences, nonetheless, vaccines were developed in a quite short time, however, the virus keeps mutating and even when vaccines are effective preventing grave forms of Covid-19, the mutations have made the new virus strains more infectious that is to say they are transmitted easier in other cases also are more aggressive as was the case of delta variant, in some other, the symptoms are not grave even more the disease can go unnoticed like sile omicron or BA.2 which allows a greater rate of infection. In conclusion, the mutations have changed the time of incubation, the severity of the symptoms, vulnerable groups, and infection rate, a fact that has allowed the virus to continue active.

All the processes in the question requires energy, but the only one that does not occur in plants is the 1. Locomotion, since a plant do not move on its own.

The pain receptors are called as noniceptors that are known to exist in muscle, joints, ad skin. A noxious stimulus is known by receptors that are located on the cell membrane of the sonsory nerve ending.

Hair cells are the sonsory receptors of both the auditory system and vestibular system in the the ears of all vertebrates and lateral line organ of fishes.

During vision, rod and cone phoroceptors respond to light intensity and color.

Answer - Option 1 - bare dendrites of sensory neurons

Photosynthesis is the process in which the chloroplasts transform the energy from sunlight into biochemical energy and store it in ATP molecules.

Cell respiration is the process in which biochemical energy is synthesized by the mitochondria.

The correct answer is "mitochondria"

Answer

Cells

Explanation

All living things, plants and animals are made up of cells.

A cell consists of three basic parts, 1. a nucleus - which is the center of the cell, and it contains chromosomes that carry genetic information. 2. a cytoplasm which is the medium for all the organelles, it consists of water and salts which makes up the solution that enclosing the cell. 3. the cell membrane, which is used by the cell to sepate the inner part of the cell from the outer part. So the cell consists of many other organelles like mitochondria.