Rapid changes to skin color in many vertebrates is under the control of ________.
A. melanocyte-stimulating hormone B. adrenocorticotropic hormone C. thyroxine D. melatonin

The labels in order indicating the passage of lacrimal fluid through the lacrimal apparatus beginning with the site of synthesis are

The lаcrimаl glаnds аre serous type exocrine glаnds thаt secrete lаcrimаl fluid onto the surfаces of the conjunctivа аnd corneа of the eye. Lаcrimаl fluid аcts to the cleаn, nourish аnd lubricаte the eyes. It forms teаrs when produced in excess. It is locаted аnteriorly in the superolаterаl аspect of the orbit, within the lаcrimаl fossа, а depression in the orbitаl plаte of the frontаl bone.

The lаcrimаl аppаrаtus is the system responsible for the drаinаge of lаcrimаl fluid from the orbit. Аfter secretion, lаcrimаl fluid circulаtes аcross the eye, аnd аccumulаtes in the lаcrimаl lаke, locаted in the mediаl cаnthus of the eye. From here, it drаins into the lаcrimаl sаc viа а series of cаnаls.

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Answer:

industrial waste

Explanation:

Answer:

ambot lang kapuya da mura tag tae ani

Answer:

to provide enery for the active transport of minerals ions from soil

Answer: The correct answer is C, seed. Seeds are not used in vegetative propagation; instead, vegetative propagation involves taking parts of existing plants and using them to create new plants. This can include taking cuttings from stems, leaves, and roots.

According to the biological species concept, a species is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring.  The separation between species is maintained by reproduction isolation, which prevents gene flow between species. But in some cases, distinct species can occasionally interbreed, producing hybrid offspring.

In science there are several concepts of species from various viewpoints of experts. One of them is the concept of biological species which describes a species as a group of populations whose members have the potential to interbreed in nature and produce suburban and suburban offspring. Speciation or the formation of new species can be caused by geographic isolation, reproduction, and genetic changes. Reproductive isolation will prevent cross-breeding between two sympatric species to produce fertile marriages.

Hybrid offspring occurs because two different species can sometimes cross over. If the individual has one different trait it is called monohybrid, two different traits are called dihybrid, three different traits are trihybrid, and so on.

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Exocytosis effectively ousts the loss from the cells to keep a stable interior climate. During the course of endocytosis, cells use proteins and lipids from the plasma layer to deliver vesicles.

The exocytosis cycle conveys proteins, lipids, and carbs to the plasma layer or the extracellular space to support plant cell development, improvement, and reaction to natural boosts. Endocytosis is the course of effectively moving atoms into the cell by immersing them in its layer. Endocytosis and exocytosis are utilized by all cells to ship atoms that can't go through the film inactively. Exocytosis gives the contrary capability and pushes particles out of the cell. Endocytosis and exocytosis are significant systems for bringing substances into and out of a phone. Cells use exocytosis to discharge proteins. A significant number of the proteins made on the harsh endoplasmic reticulum and handled by the Golgi device are arranged into vesicles bound for the plasma layer.

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2.) its such a beautiful animal and very majestic

Explanation:

3.) they have very thick blubber

4.)survival

~helps them stay warm while in cold waters

Explanation:

Benthos are the organisms that live at the bottom of the Chesapeake Bay and its streams and rivers. The word benthos comes from a Greek term meaning “depths of the sea.” Benthic communities are complex and include a wide range of animals, plants and bacteria from all levels of the food web.

Answer:

c) The mother cell gives rise to two daughter cells with half the number of chromosomes.

Explanation:

Mitosis is a type of cell division in which a parent cell is divided into two daughter cells having diploid i. e. double number of chromosomes. This type of cell division occurs in the somatic or body cells which is responsible for the growth of that organisms. This mitosis cell division has six phases such as prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis. Both daughter cells are identical to parent cell.

Answer:

The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. ... Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.

Explanation:

brainliest please

to the cytoplasm by RNA

Explanation:

The genetic information is transferred from the nucleus to the cytoplasm by RNA (Ribonucleic acid).

Crossing over is the exchange of chromosome segments between non-sister chromatids during meiosis. This process is one of the mechanisms responsible for genetic diversity and also serves as the basis for genetic mapping. Genetic mapping is used to determine the position of genes on a chromosome.

To establish experimentally that the frequency of recombination between two genes is related to the distance between them along the chromosome, the following steps must be followed: The frequency of recombinants is determined by cross-breeding parent organisms with different traits. Determining the distance between the two genes is the next step in the process. This is accomplished by observing the percentage of recombinant progeny that result from a particular cross. The distance between the genes is proportional to the frequency of recombinant progeny. Crossing over occurs more frequently between genes that are far apart on the chromosome than those that are close together. As a result, genes that are close together are less likely to cross over and produce recombinant offspring.

To determine the distance between genes on the chromosome, a mapping function is used. By analyzing the frequency of recombinant progeny resulting from different crosses, the distance between the genes can be calculated. This distance is proportional to the frequency of recombinants.

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If a mother is heterozygous (a carrier) for hemophilia and the father does not have hemophilia, each son has a 1 in 2 (50%) chance of getting his mother's hemophilia allele and having hemophilia. Each daughter has 1 in 2 (50%) chance of getting her mother's hemophilia allele and being heterozygous.

If one female is heterozygous for the hemophilia trait and is considered a carrier. One male receives a damaged X-chromosome and inherits the condition known as hemophilia. If a man does not have hemophilia, he will have a non-hemophilia allele on his X chromosome which in this case would be "H". The mans genotype would be "XHY". Man with hemophilia will have XhY genotype since it is an recessive disorder .

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Answer:

what are u taking this on

An increase in the levels of fossil fuels results in higher carbon dioxide levels in the atmosphere. So the correct option is C.

The components of fossil fuels are decaying plants and animals. These fuels may be burnt to provide energy and can be found in the crust of the Earth. An example of fossil fuel is coal, as well as oil and natural gas.

Coal is a substance that is typically found in sedimentary rock formations, which are collections of rock, dead plant and animal materials, and layers of silt. A chunk of coal must contain more than 50% fossilized plant material.

Shale is one sedimentary rock type that contains oil in its native form. The thick oil that may be used to generate gasoline is created by heating this substance. Typically, pockets of natural gas can be found atop oil deposits. Additionally, sedimentary rock strata devoid of oil might contain it. Methane is the main component of natural gas.

Therefore, an increase in the burning of fossil fuels will result in higher carbon dioxide levels in the atmosphere. So the correct option is C.

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Answer:

D

Explanation:

The tropics are hot and have high percipitation rate

also plz mark me brainliest!

thx!

Answer:

D

Explanation:

because it says " hot and gets alot of  precipitation throughout the year? " when its hot its rains alot . EX : a rainforest

If a scientist isolates genes for Hepatitus B antigens from a Hepatitus virus, then inserts them into a bacterial plasmid and replicates the bacteria in a fermenter, the product collected will be transgenic bacterial plasmids, inside the bacteria, in order to proove if the transgenic plasmid actually gives the bacteria resistance to the virus, it has to be grown in an infected medium.

The correct answer is option A.

The muscularis mucosae function in ways quite similar to the muscle fibers of the arteriole walls in the human body.

The muscularis mucosae is a thin layer of muscle found in the tunica mucosa of hollow organs of the human body, such as the gastrointestinal tract. The muscularis mucosae is a type of smooth muscle, and it is located beneath the mucous membrane's epithelium.The muscularis mucosae has two principal layers of smooth muscle cells, which are orientated in an internal circular and an external longitudinal direction. These two layers' orientation gives the mucous membrane the ability to undulate, which propels food through the digestive system.

Aside from being present in the human body, the muscle fibers of arteriole walls are a structural feature of the cardiovascular system that controls blood flow through the arteries by contracting and relaxing. The contraction of the arteriole smooth muscle layer reduces blood flow to a region, while the relaxation of the smooth muscle layer increases blood flow to a region.

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Without the sun, most/all life would cease to exist, especially once depending on light energy from the sun like plants, forming the bases of life.

Explanation:

Plant (producers) use light energy to photosynthesis, producing the energy or food other herbivores (plus, our primary&secondary consumers) dependant upon, to survive; then, they get preyed upon (by our tertiary consumers) - structuring the food chain as we all know of. Hence, sustaining life/ living organisms on earth, for generations to come.

Thus, all life on earth as we know it, basically, won't exist. Abiotic factors are the one's to live a happy ever after. There are non-living, once that don't undergo cellular respiration like us humans, e.g., rocks don't respire.

Anyways the sun is a star, one day (millions to billions years onwards) it's predicted to engulf our earth, when transitioning to become a red giant. So, it might not sustain earth forever.

Don't panic, you won't live to experience this! How fantastic does this sounds?

Hope this helps!

The correct option is b. the parental origin of the normal and deleted chromosome. Prader-Willi syndrome or Angelman syndrome can be caused by a deletion from a stretch of chromosome 15, based on the parental origin of the normal and deleted chromosome.

Prader-Willi syndrome and Angelman syndrome are two genetic disorders that are caused by a deletion from a stretch of chromosome 15. However, the clinical manifestation of these disorders depends on the parental origin of the deleted chromosome. This phenomenon is known as genomic imprinting.

If the deletion occurs on the chromosome inherited from the father, then it leads to Prader-Willi syndrome. However, if the deletion occurs on the chromosome inherited from the mother, it results in Angelman syndrome. The reason for this difference is that the genes in the region are expressed differently depending on their parental origin, and the deletion of the chromosome alters the expression of genes that are normally expressed only from that specific chromosome.

The methylation status of the region also plays a critical role in determining the expression of these genes. Proper methylation of the region ensures that the genes are expressed correctly. Thus, a lack of proper methylation of the region can also lead to the manifestation of Prader-Willi syndrome or Angelman syndrome.

Nondisjunction events, where chromosomes fail to separate properly during meiosis, can also cause disorders involving chromosome 15, but the specific disorders resulting from a nondisjunction event would not be related to the parental origin of the chromosomes involved. Similarly, a translocation event, where a segment of chromosome 15 is exchanged with another chromosome, can also cause genetic disorders, but the specific disorders resulting from a translocation event would depend on the genes affected by the translocation, rather than the parental origin of the chromosomes involved.

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Allopatric speciation is a type of speciation that occurs when a single population becomes separated, resulting in the formation of two separate, distinct populations.

For her science project, Alicia wants to model allopatric speciation using a population of ants. To achieve this, she needs to take the following steps:

First, she needs to divide the ant population into two separate groups by creating a geographical barrier that separates the two groups. Second, she should allow the two groups of ants to evolve independently of each other. Over time, the genetic makeup of each population will change due to genetic drift, natural selection, and mutation. Third, after a suitable period of time has passed, Alicia can compare the two populations of ants to see how different they have become. By comparing the two populations, she can observe how allopatric speciation can lead to the formation of new species.

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Image viewed through the microscope is upside down and in reverse from the actual object or specimen.

The microscope produces an inverted and reversed image when observing objects. This means that the image viewed through the microscope is upside down and in reverse from the actual object or specimen.

The light microscope is an essential tool for scientific research as it provides magnification, which enables scientists to view objects at a cellular level. When light enters the microscope, it passes through the lenses that magnify and focus the light on the specimen. As light passes through the objective lens and forms an image, the image is reversed from right to left. It is also inverted from top to bottom. This means that what is seen through the microscope is upside down and in reverse.

However, microscopists learn to adapt to this and can quickly adjust their positioning and movement to account for this. Overall, understanding that images viewed under the light microscope are inverted and reversed helps researchers and students learn about the structure and function of microscopic organisms.

This is a crucial aspect of studying biology, as many living organisms can only be viewed through a microscope, and it's important to have an accurate understanding of what is being viewed.

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Goa's climate is tropical, hot all year round, with a long and sunny season, which runs roughly from mid-October to mid-May, and a rainy season due to the south-west monsoon, more or less from late May to early or mid-October, and characterized by stuffy weather, cloud cover and frequent rains, which occur almost daily .

The coconut seed is especially well adapted to increasing its range by the method of ocean dispersal. The seed floats when its outer layers dry out. The buoyant coconuts drift on ocean currents and end up on tropical beaches where they germinate and take root.

Coconut tree grows only in the tropical climate. This plant live on the sandy soil, requires a lot of sunlight and regular rainfalls. Coconut tree does not tolerate low temperatures and low percent of humidity.

so goa is one place which is suitable for growing coconut.

Hope you've understood ☺️

The nitrogenous bases found in DNA but not RNA are thymine (T) and deoxyribose (dR).

DNA (deoxyribonucleic acid) contains four nitrogenous bases: adenine (A), cytosine (C), guanine (G), and thymine (T). Thymine is unique to DNA and pairs specifically with adenine through hydrogen bonds in the DNA double helix structure.

On the other hand, RNA (ribonucleic acid) contains the nitrogenous bases adenine (A), cytosine (C), guanine (G), and uracil (U). Uracil replaces thymine in RNA and pairs with adenine during RNA synthesis and protein synthesis.

Therefore, thymine is the nitrogenous base that is specifically found in DNA and not in RNA.

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The activator's ability to activate a target promoter is unaffected by the replacement of the DNA binding domain, which just changes the site at which it will function.

The DNA regulatory sites close to the promoter regions, which function as on/off switches, are where activator proteins interact. This binding promotes the activity of the RNA polymerase and the transcription of adjacent genes.

Gene expression in a eukaryotic cell must be activated by transcriptional activators. RNA polymerase II can be drawn to the promoter or extended with the help of activators attached to the enhancer.

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Answer:

MUTATION

Explanation:

Mutation is a change or alteration in the genetic sequence of a DNA or RNA (nucleic acid) that are induced by a chemical substance called MUTAGEN or by a spontaneous occurrence. Mutation are of different types depending on how it occurs in the cell. A mutation can be deletion (removal), substitution (replacement), insertion (addition) etc.

Based on this question that states that "any change in the sequence of bases in DNA or RNA that can be caused by mutagen or can happen spontaneously in the cell", the process of MUTATION is being described.

Answer:

Is the difference between the concentration of the molecules between the region of the high concentrations and that of the lower concentration