Widespread deforestation in Brazilian rainforests has resulted in small, isolated patches of palm trees and the loss of birds that eat the seeds of the palm trees. Studies are showing that the seed size of the trees is decreasing after birds have left the area. The table shows the expected change in seed size after birds disappeared from the area.

Which statement ,begin emphasis,best,end emphasis, explains why the seed size is changing?

Answer:

Explanation:

to control levels of regulated variable (glucose) -- usually have one or more effectors that respond in opposing ways. In this case, effectors for uptake of glucose are liver, adipose tissue, and skeletal muscle; effector for release of glucose is liver

Answer: Liver, adipose tissue, and skeletal muscle.

Explanation:

Answer:

Cell and it's Environment refers to the activities of the cell in a given environment or the functions of the cell in a particular condition

The complex in the electron transport chain does not contribute to the proton gradient across the mitochondrial membrane is complex II

Electron transport is the final part of aerobic respiration which occurs in mitochondria to produce ATP. At this stage the NADH and FADH2 produced from previous processes such as glycolysis and the Kerb cycle are transferred to the inner mitochondrial membrane to be converted into ATP in the electron transport chain.

The electron transport chain involves three enzyme complexes embedded in the mitochondrial inner membrane that can transport enzymes and pump protons. Complex II is a component of electron transport that only accepts electrons from FADH2 and does not pump protons across the mitochondrial membrane. Therefore, this process produces a small amount of ATP.

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The cranial nerves are a part of the peripheral nervous system and are comprised of twelve pairs of nerves that originate from the brainstem.

The brainstem is the lower part of the brain that connects to the spinal cord, and it consists of three regions: the midbrain, the pons, and the medulla oblongata.

The medulla oblongata, also known as the medulla, is part of the myelencephalon, which is the most caudal part of the brainstem. It is responsible for several critical functions, including regulation of heart rate and breathing.

The medulla oblongata develops from the hindbrain vesicles, which are part of the embryonic nervous system. The hindbrain is the most caudal part of the brain, and it is responsible for several vital functions, including controlling movement and coordination, regulating autonomic functions, and processing sensory information.

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All species at a specific trophic level interact solely with other organisms at that level. Here options B and D are the correct answer.

Trophic levels refer to the hierarchical classification of organisms based on their role in the food chain or food web. Each trophic level represents a group of organisms that share a similar source of energy or nutrition.

Not all organisms at a given trophic level are members of the same species. Trophic levels can contain a diversity of species, each with its own unique adaptations and behaviors.

Organisms at a given trophic level interact primarily with other organisms at the same level. For example, primary consumers, which occupy the second trophic level, typically feed on primary producers, which occupy the first trophic level. This type of interaction is called "trophic cascading."

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A) liver  is the most metabolically active organ in the human body.

In general ,liver is considered as the  most metabolically active ang greatly aerobic organ of the human body .Liver receives almost 29% of the blood in total that flow and  it use to extract almost 20% of the oxygen used by whole body. Liver is also answerable for the synthesis and degradation of carbohydrates, proteins, and lipids.

Liver use to converts the nutrients in our diets that can be used by our body, and also stores these substances and supply them to the cells  when needed. They also convert toxic substances  into harmless ones and help body to release them .

Hence, A is the correct option

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Semicodur compounds mainly use GaAs - Gallium Assanaide. The main difference between these two selections - hole pair recombination is that the minority carries life. This is a material property. So it is different for different materials silicon and GaAs will have different recombination rates.

This combination of free electrons and holes is called electron-hole recombination. When recombination occurs, the hole doesn't go anywhere, it just disappears.

This recombination process occurs continuously inside the semiconductor and fills every hole. However, the incoming heat energy continues to create new holes by lifting valence electrons until the conduction band forms electron-hole pairs. The formation of electron-hole pairs and their recombination occurs continuously.

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As electrons move down the chain, energy is released and used to pump protons out of the matrix, forming a gradient. Protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water.

Hereditary characteristics are traits that can be handed on from parents to their offspring. DNA, which is found in all living organisms, contains all the instructions required for them to survive, grow, and reproduce.

option A

During reproduction, the parents' DNA, which contains all of the information in the reproductive cells, is passed from generation to generation. Thus, all characteristics are passed down from one generation to the next via genetic material or DNA. A fundamental biological concept called heredity explains why children resemble their parents yet differ from them in some ways. The specific mechanisms through which genes are used to transmit traits or characteristics from one generation to the next are referred to as heredity.

Numerous genes can be found on each chromosome  a cell. Every cell of every individual creature contains exactly the same amount of chromosomes. An organism's genetic makeup is passed down from generation to generation.

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The complete question follows

hereditary traits are transmitted from generation to generation by means of A) specific sequences of bases in DNA in reproductive cells B) protein in body cell C) carbohydrates in body cells D) specific starches making up DNA in reproductive cells

The Antarctic fish can transport enough oxygen in their blood just by simply dissolving the oxygen into their blood without the requirement of hemoglobin. The cold water has abundant oxygen dissolved in it which is  available or the fishes.

Blood is the main transporting tissue of the body the mediates the transport of various nutrient, gases and other molecules to the whole body. Some organisms like human also have a pigment in their blood. The blood is pumped into the body the heart.

Hemoglobin is the red colored pigment present in the blood oh humans inside the red blood cells. This pigment is responsible for the transport of oxygen into the whole body.

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During nondisjunction, two gametes contain two sets of chromosome and two gametes does not contain any chromosome. Hence, options A and B are correct.

Meiosis is a type of cell division that results in the production of four gamete cells and a 50% reduction in the number of chromosomes in the parent cell. To develop egg and sperm cells for sexual reproduction, this process is necessary.

Cells move through prophase, metaphase, anaphase, and telophase with each round of division.

During nondisjunction, two gametes contain two sets of chromosome and two gametes does not contain any chromosome. Hence, options A and B are correct.

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The hydrolysis reaction is more exergonic than the endergonic conversion of ADP (the endergonic conversion of adp to atp requires more than 30 kj/mol) which is the truth about how phosphoenolpyruvate is converted to pyruvate to promote the conversion of adp to atp.

An ATP molecule becomes an ADP when the tail of the molecule's phosphate group is severed (via hydrolysis) (adenosine diphosphate). That hydrolysis produces energy and is an exergonic reaction. The phosphate is attached to ATP by weak bonds. Although they are not strong (if they were strong, it would take a lot of energy to break them), they are known as high energy bonds. Consider ATP as a spring-loaded molecule with the last phosphate simply tacked on.

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Aquaculture engineering is a multidisciplinary field of scientific engineering which aims to solve technical problems and problems related to aquatic ecosystems.

Aquaculture engineering is a multidisciplinary field of scientific engineering that aims to solve the technical problems which are associated with the farming of aquatic vertebrates, invertebrates, and algae. Common aquaculture systems are used for requiring optimization and engineering include the sea cages, ponds, and recirculating systems.

Aquaculture engineering provides insights into the biological, chemical, and physical processes which govern aquatic ecosystems and the organisms which inhabit them. Aquaculture engineering can be used to develop new techniques as well for manipulating, monitoring, and optimizing aquatic systems, as well as for the evaluation of their ecological impacts.

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Answer:

correct answer is option c

RNA is composed of two strands of nucleotides joined together in a double helix, while DNA is composed of a single strand.

DNA is a double-stranded molecule shaped like a double helix that stores genetic information. RNA is a single-stranded molecule that converts the genetic information encoded in DNA into proteins.

The structural variations between DNA and RNA are to blame for this. DNA is made up of two strands of nucleotides linked together in a double helix, whereas RNA is made up of a single strand. Phosphate groups in DNA are connected to the sidewalls of base pairs, whereas phosphate groups in RNA are associated to the 5' end of the molecule. This enables the RNA molecule to connect with other molecules in the cell more easily and engage in a range of biological functions.

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Explanation:

the full classification of organisms will include more categories of organisms than their scientific names. The scientific names of organisms include a single nomenclature, but the full classification includes various nomenclatures.

Both parents have a mutation in enzyme 1 preventing melanin to be produced.

The iris contains melanin pigment, which gives the appearance of human eyes' coloration. This tissue also contains intricate patterns including Fuchs' crypts, nevi, Wolfflin nodules, and contraction furrows. Since the first quantitative trait studies in humans, the genetic underpinnings of the determination and inheritance of these traits have been the focus of discussion and investigation.

Although segregation of blue-brown eye colour has been described using a straightforward Mendelian dominant-recessive gene model, this is too simplistic, and a novel molecular genetic perspective is required to fully appreciate the biological intricacies of this process as a polygenic feature. However, it has been determined that a region on chromosome 15 that contains the OCA2 gene can account for 74% of the variation in the colour of human eyes.

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In the cross MMnn x mmNN, the proportion of the resulting offspring that would be homozygous dominant for both genes is 3/16. The correct answer C.

This is because there are four possible genotypes that can result from the cross: MMNN, MMNn, MmNN, and MmNn.

Since the probability of getting each of these genotypes is the same (1/4), the proportion of offspring that would be homozygous dominant for both genes is 3/16.

This is because the probability of any given genotype is 1/4, and there are 3 homozygous dominant genotypes out of 4 possible genotypes.

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Intthe cross MMnn mmNN; what proportion of the resulting F1 would be homozygous dominant for both genes?

Select one:

a.none

b.1/16

c.3/16

d.9/16 16/16

The thyroid is the body's biggest endocrine gland. It is located in the neck and is in charge of producing hormones like thyroxine, which regulate the body's metabolic rate.

In the chest, between the lungs, is the thymus gland. It produces T lymphocytes, which are white blood cells that are a part of our immune system or aid in preventing infection. The thymus gland was located in the chest, behind the sternum or breastbone, between the lungs.

The parotid glands are located just in front of and beneath each ear. The sublingual and submandibular pairs of large salivary glands are two more pairs that you possess (under your jaw). The Stensen's duct, which your parotid gland joins, is a tube that brings saliva into your mouth and releases it close to your top molar teeth.

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The differentiated cells of the developing embryo are basically derived from the germinal layers.

Differentiation is basically the process by which a particular unspecialized cell, like a fertilized egg cell, divides a number of times in order to produce specialized cells. The differentiated cells of the developing embryo are derived basically from the germinal layers.

During the third week of fertilization, the process of gastrulation takes place. During gastrulation, the developing embryo or the inner cell gets differentiated into three germinal layers which are the ectoderm, endoderm as well as the mesoderm. All the parts and organs of the body are derived from these structures.

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Option D: 6 minutes would be taken by the process to kill all organisms when starting with 100,000 organisms.

Sterilization is the process of physically or chemically eradicating or destroying the life of any type of germ in a medical setting. The primary sterilisers used in medical institutions include pressurized steam, dry heat, EtO gas, hydrogen peroxide gas plasma, and liquid chemicals. Sterilization is the act of expressing the truth. Unfortunately, some medical experts, technical, and business publications refer to sterilization and articles as "semi-sterile." If a process kills 90% of the organisms per minute, it will take 6 minutes to kill all organisms when starting with 100,000 organisms.

Chemical disinfectants are terms used to describe chemicals that are employed to eliminate all types of microbiological life. It's possible that the same disinfectant used for shorter exposure times will also be employed throughout the disinfection procedure (ie, higher levels of disinfection).

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Complete question is:

If a process kills 90% of the organisms per minute, how many minutes would it take to kill all organisms when starting with 100,000 organisms?

3 minutes

1 minute

2 minutes

6 minutes

Amylose differs from amylopectin in that amylose forms a helix and no branch points

Amylose as well as amylopectin have been two polysaccharide utilise throughout starch granules. They differ structurally and chemically, but they also share similarities. The primary distinction between amylose as well as amylopectin has been that amylose is already a such a long chain polymer as well as amylopectin has been such a branched chain polymer.

A polysaccharide called amylose is constructed from several D-glucose units. The presence of amylose in the starch causes the color to shift to dark blue or black when iodine is introduced. Amylase is an enzyme that can hydrolyze amylose into glucose units because it is soluble in water.

A polymer of multiple D-glucose molecules makes up amylopectin. Starch contains 80% of the amylopectin in nature. It is insoluble in water. Because the starch granules swell when heated with water, a colloidal solution results. In hot water, it dissolves easily. It turns into a starch paste or gel when it cools.

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Answer:

The Sodium-Potassium Pump

In active transport, as carrier proteins are used t o move mater ials against their concentration gradient, these proteins are k nown as pumps

Explanation:

Hopefully this is the answer you are looking for.

The experimental results of a bacterial colony growing on eosin methyl blue media and appearing as a dark, metallic colony will be: The growth of gram-negative bacteria having the ability to ferment lactose.

The eosin methyl blue staining is performed to differentiate between the gram-negative bacteria that are able to ferment lactose and those who are not. The stain prevents the growth of gram-positive bacteria hence it also helps in identifying the gram-negative strains.

Lactose is a disaccharide sugar which can be naturally found in milk and milk products like cheese. A galactose and glucose unit combine together to form the lactose.

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The types of mutant commonly result from regulatory mutations that increase the rate of transcription of a gene is hypermorphic.

Generally speaking, increasing the rate of transcription causes the generation of extra gene product, which causes extra gene activity.

A mutant could produce an active product with a new and different function or more of the active product (hypermorph) if it has a gain-of-function allele (neo morphs). Last but not least, antimorph alleles, sometimes referred to as dominant negative mutations, have an activity that is dominant and opposing to that of the wild-type product.

As a result, mutant alleles can arise from mutations (changes in a gene's sequence) that do not produce the same quantity or kind of active product as the wild-type allele. One of five categories—amorph, hypomorphic, hypermorph, neomorph, and antimorph—can be applied to any mutant allele.

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The 4 fields of anthropology are: Archaeology, Bioanthropology, Linguistic Anthropology, and Social-Cultural Anthropology.

Anthropology is the field of science that deals with the study of humanity, human behavior, human biology, cultures, societies, and linguistics, of the past as well as present. The goal of studying anthropology is to understand the evolutionary history of the humans.

Archaeology is the field of anthropology where human history is studied by the extraction, recovery and analysis of remains from the past. Thus, it is a study of the past cultures. The record for archaeology may consist of artifacts, architecture, biofacts, sites, and cultural landscapes. Archaeology further has 3 sub-divisions: medieval, post-medieval and modern.

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In the question given the the statement pyrimidines = purines is incorrect as pyrimidines (C and T) are not equal to purines (A and G) with respect to their molecular structure.

The Erwin Chargaff rule with respect to DNA composition state that The amount of adenine (A) is equal to the amount of thymine (T), and the amount of cytosine (C) is equal to the amount of guanine (G). This is general rule of Chargaff's. Also , the  base composition of DNA varies between different species, the base composition is relatively constant is similar species.

Hence , the statement A=T, C=T, G=C, G=A, pyrimidines = purines  is not correct. The correct statement will be "A=T and C=G", that indicates about the equal amounts of these base pairs in DNA as per Chargaff's rule.

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An action potential, another name for a nerve impulse, is produced and carried along a neuron through a number of intricate processes involving ion channels, pumps, and neurotransmitter molecules.

Stimulus: A stimulus, such as a shift in temperature or pressure or the presence of a chemical neurotransmitter, causes the development of a nerve impulse.

Depolarization: When an external stimulus enters a neuron's dendrites, it opens ion channels that let positively charged ions like sodium (Na+) into the cell. The membrane potential of the neuron changes abruptly to a more positive state, a process known as depolarization.

Threshold: When the membrane's depolarization reaches a specific point, or the threshold, additional ion channels begin to open and the membrane depolarizes quickly and completely. This is when the nerve impulse starts.

Depolarization of the membrane produces an electrical charge wave that propagates along the axon, the portion of the neuron that carries the nerve impulse. Action potential describes this depolarization wave. The next location along the axon is where the action potential causes the opening of ion channels, which causes depolarization to quickly spread along the axon.

Repolarization occurs when the ion channels close and the positively charged ions are expelled from the cell after the action potential has passed. Repolarization is the process by which the membrane potential shifts from positive to negative as a result. The cycle then resumes, enabling the nerve impulse to go further along the axon.

Neurotransmitter molecules are released into the synaptic cleft—the tiny area between one neuron's axon and another's dendrite—when a nerve impulse reaches the terminal ends of the axon. The following neuron sends off a new nerve impulse as a result of the neurotransmitter molecules attaching to receptors on the dendrite.

In conclusion, the creation and conduction of a nerve impulse is a complicated process that includes modifications to membrane potential, ion flow, and neurotransmitter release, enabling prompt and effective information transfer from one neuron to the next.

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Answer: it’s C

Explanation:

Contraceptive pills that continuously inhibit the release of GnRH from the hypothalamus will restrict the hormones released by the pituitary that causes ovulation to occur.

The progesterone and estrogen in contraceptive pills block luteinizing hormone and follicle-stimulating hormone, respectively. Due to the ovulation suppression caused by combined oral contraceptives, there won't be any fertilization if there isn't an egg.

By a stalk comprised of blood arteries and neurons, the hypothalamus and pituitary gland are joined (the pituitary stalk). Hormones and nerve impulses, respectively, go through that stalk from the anterior pituitary lobe and posterior pituitary lobe to the hypothalamus. Corticotropin-releasing hormone stimulates the anterior pituitary's ability to produce adrenocorticotropic hormone. Somatostatin inhibits several intestinal hormones as well as growth hormones and thyroid-stimulating hormones.

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