brain neurotransmitters that decrease pain and produce feelings of well-being are called:

Answer:

I think that it would be; Population, Community, Ecosystem, Biomes, Biosphere.

Explanation:

Hope this helps!

Answer:

temparate deciduous

grasslands

tropical rain forest

taiga

tundra

grasslands

tropical rain forest

temperate deciduous rainforest

Explanation:

Answer:40 weeks

Explanation:

Within 24 hours of fertilization, the zygote (two combined gametes) begins to divide into many cells. Within 8 weeks of pregnancy, the embryo is now a fetus, and the total development time from a zygote to a fully formed fetus is 40 weeks, typically.

Answer:

A that the answer

Explanation:

hope it helps

If you were looking at a frog's lifecycle, you would find more specialized cells in the adult frog stage (option b).

In a frog's lifecycle, the adult frog stage is where you would find more specialized cells. This stage occurs after the frog has gone through various developmental stages, starting from the beginning ball of cells.

1. The beginning ball of cells: This is the initial stage of a frog's development. It starts with the fertilization of the egg and the formation of a zygote. At this stage, the cells are not yet specialized and are in the process of dividing and multiplying.

2. Developing tadpole: After the beginning ball of cells, the zygote undergoes further development and transforms into a tadpole. The tadpole stage is characterized by the presence of gills and a tail. The cells in this stage are becoming more specialized but are still relatively unspecialized compared to the adult frog stage.

3. Adult frog: The adult frog stage is the final stage of the lifecycle. At this point, the tadpole has undergone metamorphosis and has transformed into a fully developed frog. In this stage, the cells have become highly specialized to perform specific functions necessary for the frog's survival, such as muscle cells, nerve cells, and specialized organs like the heart and lungs.

4. The same amount at all stages: It is not accurate to say that there is the same amount of specialized cells at all stages of the frog's lifecycle. As the frog develops and goes through metamorphosis, the cells differentiate and specialize to fulfill specific roles and functions required for each stage of development. The highest concentration of specialized cells is found in the adult frog stage.

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Answer is B) decay at a constant rate

Answer:

B

Explanation:

Answer: Robert Hooke

Explanation: I already take the test

Robert Hooke was not involved in solving the mystery of the configuration of the DNA molecule.

Robert Hooke saw little, box-like cavities, which he depicted and referred to as cells. He had stumbled across plant cells! Hooke's finding laid the groundwork for cell theory by revealing cells as the tiniest constituents of life.

DNA Molecule- Nucleotides are chemical building units that make up DNA. A phosphate group, the sugar group, and one of four different nitrogen bases make up these building components. Nucleotides are joined together into chains, with both the sugar and phosphate groups switching places, to create strands of DNA.

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The ancestors of land plants were probably green algae similar to charophytes that lived in coastal marshes or lake fringes.

The two main types of green algae are charophytes and chlorophytes, and it is generally accepted that charophytes are the closest living relatives of land plants. Land plants developed within Charophyte algae more than 450 million years ago, according to analyses of morphological and genomic evidence.

The six different categories of charophyte algae are the Mesostigmatales, Chlorokybales, Klebsormidiales, Charales, Coleochaetales, and Zygnematales. They are primarily freshwater green algae with a variety of morphologies. The last three of them, the Charales, Coleochaetales, and Zygnematales, have traditionally been regarded as the first terrestrial plants.

Over the past ten years, there has been debate over which category of charophyte algae is more closely linked to terrestrial plants.

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Answer:

im sorry there are no options to the question

Answer:

Speed = Distance/ Time taken

Answer:

B

Explanation:

in translation, DNA is translated into RNA

Answer:

Enzymes have an activation site that fits a substrate. when the substrate is attached to the enzyme, the enzyme acts as a catalyst and breaks the substrate apart or binds it together. denaturing occurs when the control changes the enzymes shape.

Explanation:

Make me brainliest

In the image, the form of DNA sequence that is highlighted therein is C. SNP profiling.

SNP profiling is a way of categorizing the genetic variations of a single nucleotide. In the diagram, we can see a DNA strand and the nucleotides that make it up.

Also, we can see how these nucleotides are categorized by their genetic variations. So, the term that represents the image in the figure is SNP profiling.

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This recruitment allows the enzyme to be readily available at the membrane, where it can interact with its substrate and initiate cellular signaling pathways in response to the toxin-induced calcium influx.


The most likely reason that sphingomyelinase can quickly respond to a toxin that facilitates calcium entry into the cell is due to its recruitment to the membrane by specific phospholipids called sphingomyelins.

Sphingomyelinase is an enzyme that hydrolyzes sphingomyelin, a specific type of sphingolipid found in cell membranes. Sphingomyelinase activation can be triggered by various factors, including cellular stress, pathogens, or toxins.

When a toxin facilitates calcium entry into the cell, it can disrupt the normal calcium homeostasis, leading to an increase in intracellular calcium levels. This increase in calcium can serve as a signaling mechanism to activate sphingomyelinase.

Specific phospholipids, such as sphingomyelins, play a crucial role in recruiting sphingomyelinase to the cell membrane. These phospholipids act as binding sites for sphingomyelinase and help localize the enzyme to the appropriate cellular compartments. Therefore, when the toxin-induced calcium entry occurs, sphingomyelinase can quickly respond by being readily available at the membrane to interact with its substrate, sphingomyelin.

Once activated, sphingomyelinase catalyzes the hydrolysis of sphingomyelin into ceramide and phosphorylcholine. This reaction generates ceramide, a bioactive lipid involved in various cellular processes, including cell signaling, apoptosis (programmed cell death), and inflammation. The rapid response of sphingomyelinase to a toxin-induced increase in intracellular calcium levels allows for the timely production of ceramide, facilitating downstream signaling events and cellular responses to the toxin.

In summary, sphingomyelinase can quickly respond to a toxin that facilitates calcium entry into the cell due to its recruitment to the membrane by specific phospholipids, such as sphingomyelins. This recruitment allows the enzyme to be readily available at the membrane, where it can interact with its substrate and initiate cellular signaling pathways in response to the toxin-induced calcium influx.
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Answer:

Pituitary. The pituitary gland is located below the brain. Usually no larger than a pea, the gland controls many functions of the other endocrine glands.

According to Charles Darwin, natural selection differentiates shell shapes between tortoises from the Hood and Isabela islands. He hypothesized that tortoises with shells better suited to their specific environments are likely to survive and pass on their advantageous characteristics to their offspring.

On each island, distinctive shell shapes emerged due to the gradual accumulation of advantageous characteristics suited to particular environmental circumstances.

Your mother's genotype was 2)HH. A person's genotype is their unique sequence of DNA.

As this is autosomal dominant disorder the allosomes X and Y have no part. The child is negative for the disease and is homozygous recessive. So the child’s genotype is hh. Father is also negative for the disease and his genotype will also be hh. As the mother is positive and the disease is autosomal dominant, she should have at lease one dominant allele H. As the child is negative she should have one recessive allele h.

This makes the genotype of mother Hh heterozygous dominant.

Thus, the correct option is 2.

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Complete question:

Your mother has Huntington's disease, an autosomal dominant disorder. Your father is not diseased. You get tested and find out you are homozygous recessive. Your mother's genotype was: 1) HH 2) HH 3) hh 4) XHXH 5) XHXh 06) XhXh 7) XHY

Histones have been found in both archaeal and eukarya species. There are two histones in archaeal species, four in eukaryal species, is the difference between archaeal and eukaryal species.

All living species are regularly classified into three primary domains based on DNA sequence comparisons and structural and biochemical comparisons: Bacteria, Archaea, and Eukarya. Bacteria and Archaea are both prokaryotes, which are single-celled microorganisms with no nuclei, whereas Eukarya includes ourselves and all other animals, plants, fungi, and single-celled protists, which are all organisms with nuclei that separate their DNA from the rest of the cell. The fossil record reveals that the first living species were prokaryotes (Bacteria and Archaea), while eukaryotes evolved a billion years later. Based on the type of cell in the organism, all life can be categorised into three domains: Archaea cells lack a nucleus and have a distinct cell wall than bacteria. Eukarya: cells have a nucleus.

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Answer: the yellow dye molecules are smaller than the red dye molecules

Explanation: the smaller the molecules the easier it is to transport

Answer:

D) The yellow dye molecules are smaller than the red dye molecule

Explanation:

it makes sense and i did it before

An antigenic drift occurs when there is a minor change in antigenicity caused by small mutations in a single influenza virus strain.

These mutations typically occur in the surface proteins of the virus, such as hemagglutinin (HA) and neuraminidase (NA). Antigenic drift happens due to errors in the replication process of the viral RNA, which causes genetic variations in the viral strains.

These minor alterations can lead to changes in the virus's antigenic properties, allowing it to evade the host's immune system more effectively. This is because the host's immune response, developed based on prior exposure to influenza viruses, may not recognize the new variant as effectively. Consequently, the host may be more susceptible to infection by the mutated virus.

Antigenic drift plays a significant role in seasonal influenza epidemics, as it requires ongoing updates of vaccines to maintain their effectiveness. Vaccine developers closely monitor these drifts and update vaccine compositions to target the most relevant circulating strains.

In summary, an antigenic drift is a minor change in the antigenicity of an influenza virus strain due to small mutations, which can potentially impact the effectiveness of the host's immune response and the seasonal influenza vaccine.

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Answer:

A

Explanation:

Answer:

Earth's physical layers: includes lithosphere, based on density of each layer

Earth's Compositional Layers: includes crust, based on chemical makeup of each layer

Explanation:

Earth's physical layers - lithosphere, based on density of each layer

Earth's Compositional Layers - crust, based on chemical makeup of each layer.

The physical layers of the Earth include the asthenosphere and lithosphere. The asthenosphere is the zone of Earth's mantle that lies below the lithosphere. On the other hand, the lithosphere simply means the rocky outer part of the Earth.

The compositional layers of the Earth include the mantle, the crust, the outer core, and the inner core. The crust is the outermost part of the Earth. It is the top component of the lithosphere.

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After initial infection, some infectious agents go into a dormancy, or latent phase, but may reemerge to produce a recurrent disease state.

During the latent phase, the infectious agent remains present in the body but is inactive, evading detection and immune response. The agent can remain dormant for long periods and may reactivate when the host's immune system becomes weakened or compromised. Latent infections can occur with a variety of infectious agents, including viruses, bacteria, fungi, and parasites, and can lead to the recurrence of diseases such as tuberculosis, herpes, and malaria. Effective treatment of latent infections often requires a different approach than the treatment of active infections.

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Answer:

C

Explanation:

True. Analysis of plant residues on artifacts can help to define the function of the vessels being studied.The study of organic residues from prehistoric ceramics is a subfield of archaeology. This study is useful in the understanding of the subsistence strategies of past human societies, which is mainly due to the fact that organic residues are preserved by pottery vessels.

An organic residue can be defined as a residue that has remained from the primary or secondary uses of pottery vessels.Analysis of organic residues can help identify food remains, medicine, or cosmetics, as well as document the use of ceramics as serving or storage containers, as well as evidence of trade.

Prehistoric ceramic vessels were mainly used for cooking and serving food, storing and consuming beverages, and as part of funeral rites in the Mesoamerican region. Organic residue analysis can provide information on the specific plants or animals used, the methods of processing and cooking, and even the age and origin of the ceramics.

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Answer:

It an example of newton's first law. So the answer is A

Answer:

Heterotrophs

Explanation:

they depend on other organisms for their food(autotrophs or heterotrophs)

If a person does not consume the minimum daily requirement of carbohydrates then the body will use stored glycogen and the person will look unhealthy and become weak after some time.

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Answer:

below

Explanation:

Bacterial cells and human cells share some similarities in terms of basic cell structures, such as having a plasma membrane that separates the cell from its environment and a cytoplasm that contains various organelles and molecules necessary for cellular function. Both types of cells also have DNA as their genetic material, although the organization and structure of bacterial DNA is different from that of human DNA.

However, there are also significant differences between bacterial cells and human cells. Bacterial cells are typically much smaller and simpler in structure than human cells, and they lack many of the specialized organelles and structures found in human cells, such as a nucleus, mitochondria, and complex cytoskeletal structures. Additionally, bacterial cells are prokaryotic, meaning that their DNA is not contained within a nucleus, while human cells are eukaryotic, meaning that they have a nucleus and other membrane-bound organelles.

Overall, while there are some similarities between bacterial cells and human cells in terms of basic cell structures and DNA as genetic material, there are also significant differences between the two types of cells due to their different evolutionary histories and functional requirements.