I really don’t understand-

Answer:

Hellooo

Skeletal system is the framework which gives body shape. It consists mainly of bones.

Explanation:

thanks...hope it helps

Answer:

in a snug or hidden place

Answer:

D

Explanation:

Transcription = DNA to RNA

Translation = RNA to codons to create amino acids or proteins.

Invasive species provoke significant damages in the structure of native ecosystems. They also cause economical and socio-cultural problems.

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When talking about dispersion we refer to the change in a species´ range or distribution area.

When a species move and establish in a new area out of their original distribution range, they might be considered exotic or invasive, according to their

The introduction of invasive species has ecological, economic, socio-cultural consequences. Once an invasive species has been established, it overgrows. In the new areas, these species have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-, and these factors favor their establishment. They interact with native species by competing for resources such -water, place, radiation, exposure, shelter, food, etcetera-. They provoke significant damages in the structure of native ecosystems, causing severe damage in endemic species. They produce ecological imbalances in the trophic chains and the dynamics of communities. Invasive species are uncontrollable.

As they expand, they can also affect human in an economical manner and has socio-cultural effects. Many invasive species might cause crops loss by eating cultures. They attack farm animals. They affect buildings and other structures or ships by eating wood. They might even attack humans and cause health problems.  

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if an animal cell suddenly loses the ability to produce GTP. It would not be able to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane.

G proteins, sometimes referred to as guanine nucleotide-binding proteins, are a family of proteins that function as molecular switches within cells, relaying signals from a range of stimuli outside a cell to its interior.

Their ability to bind to and hydrolyze guanosine triphosphate (GTP) to guanosine diphosphate is governed by several different variables (GDP). They are "on" when they are bound to GTP and "off" when they are bound to GDP. The wider class of enzymes known as GTPases includes G proteins.

Thus, when the cell will not produce GTP then these G protein receptors are not activated and thus signalling will not be carried further.

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Neurotransmitters are required at the neuromuscular junction to initiate a new nerve impulse along the membrane of the muscle fiber and therefore make the muscles contract.

Neurotransmitters are the chemical messengers that help in transmitting electrical impulses to and from the brain by means of nerve cells. The electrical impulse is transmitted from one neuron to another by conversion into the chemical form by means of neurotransmitters.

Muscles are the loose masses of tissues that provide a definite shape to the body and also support the organs inside the body. The human body is composed of three types of muscles: skeletal muscles, smooth muscles and cardiac muscles.

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Answer: entomologist

Explanation: Entomologist because him/her is a person who studies or is an expert in the branch of zoology concerned with insects.

The best time to clean your boat to stop the spread of aquatic nuisance species is during every time you leave the water.

Guidelines for Halting the Spread of Aquatic Pest Species

Waterborne Nuisance Species are species that negatively affect aquatic environments or activities that rely on them, including aquaculture, agriculture, or recreation. Zebra mussels, quagga mussels , and hydrilla are just a few of the aquatic invasive species that frequently travel between rivers aboard boats and trailers. These creatures multiply when introduced into new waters, displacing local species and harming the water supply.

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The most likely responsible factor for the phenotype when VEGF is knocked out in mouse embryos is **D. Hemangioblasts will not be specified in the splanchnic mesoderm**.

Vascular Endothelial Growth Factor (VEGF) plays a critical role in the development of blood vessels, specifically by promoting the differentiation and proliferation of endothelial cells. When VEGF is knocked out in mouse embryos, the proper specification of hemangioblasts in the splanchnic mesoderm is hindered. Hemangioblasts are essential progenitor cells that give rise to both endothelial and blood cells. In the absence of VEGF, these hemangioblasts fail to differentiate properly, leading to severe defects in the vascular system and ultimately resulting in the observed phenotype.

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Sara is likely to discover the report I. Ten years ago, the weather was unseasonably cold, overcast, and dry. The narrow and dark tree ring indicates that there was limited growth during that year, which is typically associated with unfavorable environmental conditions like cold, overcast, and dry weather.

Sara found a cross-section of a tree trunk and noticed that the ring that corresponds to ten years ago is very narrow and dark. This suggests that the tree did not receive enough water and nutrients during that year, which could be caused by unfavorable weather conditions. Sara decides to research newspaper weather reports for that period to find out more information. After conducting her research, Sara discovers that ten years ago, the weather was unseasonably cold, overcast, and dry. This information matches the evidence from the tree ring, as the narrow and dark ring suggests that the tree did not receive enough water and nutrients during that year. The dry and cold weather conditions could have caused this, as the tree would not have been able to absorb enough moisture from the soil.

Based on the evidence from the tree ring and the newspaper weather reports, it can be concluded that ten years ago, the weather was unseasonably cold, overcast, and dry. This information is important because it shows how weather conditions can affect the growth of trees and other plants. By studying tree rings and weather patterns, researchers can learn more about past climates and make predictions about future climate change.

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The correct options are:

Lymph transports nutrients in the body.

Lymph circulates macrophages in the body.

In vertebrates, the lymphatic system, also known as the lymphoid system, is an organ system that is a part of the immune system and works in conjunction with the circulatory system. Lymphatic tissues, lymph nodes, lymphatic or lymphoid organs, and a vast network of lymphatic veins make up this structure. In the body, the lymphatic system, cholesterol is moved.

Because of this, their liquid color seems milk-like rather than translucent. The lymph node serves as a collection point for white blood cells, which aid in the battle against infection. Macrophages are one of the white blood cells. A hormone is not made by a lymph node. An antigen was a component of the microbe; it was not created by the body. Skin epithelial cells create the protein keratin.

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Growing food in ways which minimize water and fertilizer use and protect biodiversity while enhancing farmers' livelihoods is an example of sustainable sourcing.

Sustainable sourcing is the practice of procuring goods and services in a manner that preserves and improves the natural environment, social welfare, and economic well-being of current and future generations. The process of sustainable sourcing ensures that the procurement of products and services is completed in a way that minimizes any negative impact on the environment.

Additionally, sustainable sourcing also seeks to support social and economic development and protect the human rights of all parties involved. The use of sustainable sourcing practices is vital for addressing some of the most pressing environmental and social challenges facing the world today, including deforestation, greenhouse gas emissions, and water scarcity. It is also crucial for ensuring the availability of resources for future generations.

Therefore, sustainable sourcing is a critical component of many companies' corporate social responsibility (CSR) programs.

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Answer:

hope this helps:)

Explanation:

The thyroid gland uses iodine from food to make two thyroid hormones that regulate the way the body uses energy. The parathyroid glands are four tiny glands located behind the thyroid gland. The parathyroid glands produce a substance (parathyroid hormone) that helps control the amount of calcium in the blood.

Answer:

c. red, green and blue.

Explanation:

The three main colors, also known as the primary colors are Red, Green and Blue. The trichromatic theory believes that the human eye and receive light of three different wavelengths (which are red, green and blue) and is able to combine these three different wavelengths in order to see the entire visible spectrum that make up millions of different colors. As can be visualized by the attached picture below.

According to the trichromatic theory of color vision, the eye has cones sensitive to colors associated with red, green, and blue. Therefore, the correct option is C.

According to the trichromatic theory, commonly known as the Young–Helmholtz theory, the human eye has three different types of color-sensitive cones, each sensitive to a different range of light wavelengths. These cones are most sensitive to red, green and blue light respectively.

Our visual system is able to perceive a wide spectrum of colors by integrating information from these three different types of cones. Different levels of activation of these three cone types and stimuli lead to the perception of additional colors.

Therefore, the correct option is C.

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Glycolysis, the citric acid cycle, and oxidative phosphorylation are the three basic processes that take place during cellular respiration.

Respiration is the process by which dietary components are oxidised within cells to release energy. The body then uses this energy to carry out a number of physiological and biochemical functions.

Cellular respiration takes place in three stages. They consist of:

Glycolysis is the initial process that turns glucose into pyruvate.

Pyruvate produced during glycolysis is transformed into energy substances like ATP, NADH, and hydrogen ions during the Krebs cycle.

By using the hydrogen ions generated during Kreb's cycle, oxidative phosphorylation powers the electron transport chain and produces ATP.

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Answer:

the photosynthesis equation is as follows:6CO2+6H20+(energy)-C6H1206+602

Carbon dioxide + water + energy from light produces glucose and oxygen

Answer:When the long white truck drove through Roosevelt Arch on Jan. 12, 1995, it was almost like watching a modern-day Trojan horse arrive in Yellowstone.

Inside were eight gray wolves from Jasper National Park in Alberta, Canada. They became the first wolves to roam Yellowstone since the 1920s when the last pack was killed. By the end of 1996, 31 wolves were relocated to the park.

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A general term for a group of hereditary, progressive disorders affecting skeletal muscles is muscular dystrophy.

A group of diseases called muscular dystrophy result in progressive weakness and muscle loss. Mutations in genes that cause muscular dystrophy prevent the production of proteins that are necessary for healthy muscle formation. Thus, it is a hereditary disorder.

Multiple forms of muscular dystrophy exist. The most common type begins in childhood, typically in boys. Other kinds don't show up until you're an adult.

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Lamarckian and Darwinian ideas about evolution differ in their explanations for how species change over time. Lamarckism proposes that acquired characteristics can be inherited, while Darwinism emphasizes natural selection and variation as driving forces of evolution.

Lamarckian and Darwinian ideas about evolution have fundamental differences in their explanations:

Lamarckism, proposed by Jean-Baptiste Lamarck, suggests that acquired characteristics during an organism's lifetime can be passed on to the next generation. Lamarck argued that organisms change in response to their environment and these changes are then inherited. For example, if a giraffe stretched its neck to reach higher leaves, its offspring would inherit a longer neck.

On the other hand, Darwinism, formulated by Charles Darwin, centers around natural selection and variation. Darwin proposed that organisms with favorable traits are more likely to survive and reproduce, passing those advantageous traits to subsequent generations. This process, known as "survival of the fittest," leads to the gradual accumulation of beneficial traits in a population over time.

The key differences between Lamarckism and Darwinism are:

1. Inheritance of acquired characteristics: Lamarckism suggests it is possible, while Darwinism rejects this idea.

2. Mechanism of change: Lamarckism proposes that organisms change in response to the environment, while Darwinism emphasizes natural selection acting on variations already present in a population.

3. Timescale: Lamarckism implies rapid and continuous change, while Darwinism allows for gradual and cumulative changes over long periods of time.

In summary, Lamarckian evolution focuses on the inheritance of acquired characteristics, while Darwinian evolution emphasizes natural selection and the accumulation of beneficial variations over time. Darwin's theory of evolution by natural selection is widely accepted and forms the basis of modern evolutionary biology.

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Answer:

it should be the snake bc I have one and the mouse gets eat in by the snake

According to the food web in the diagram, the hawk and the snake are the organisms competing for the mouse as a food source.

FOOD WEB:

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The false statement about epigenetic modifications is:
c. Only non-DNA components of chromatin are modified with epigenetic markers.

Epigenetic modifications refer to changes in gene expression that do not involve changes to the underlying DNA sequence. These modifications can be inherited and can influence how genes are turned on or off in different cells or at different stages of development.

a. The tails of the nucleosome octamer components can be modified with methylation: This statement is true. Methylation of the tails of nucleosome octamer components, which are made up of histone proteins, can affect gene expression by either activating or repressing the associated genes.

b. The tails of the nucleosome octamer components can be modified with acetylation: This statement is also true. Acetylation of histone tails is another type of epigenetic modification that can influence gene expression. Acetylation generally leads to gene activation by relaxing the chromatin structure and allowing transcription factors to access the DNA.

d. Epigenetic modifications control whether a region is euchromatin or heterochromatin: This statement is true. Epigenetic modifications play a crucial role in determining whether a region of DNA is in a euchromatin state, which is more accessible for gene expression, or a heterochromatin state, which is more condensed and less accessible for gene expression.

In summary, the false statement is c. Only non-DNA components of chromatin are modified with epigenetic markers. Epigenetic modifications can occur on both DNA and non-DNA components of chromatin, such as histone proteins. These modifications can have significant impacts on gene expression and are essential for cellular development and function.

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Answer:

4.54 billon years

Explanation:

the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years

Answer:

Several processes move carbon from the geosphere to the atmosphere. Volcanic eruptions release carbon dioxide from molten rock beneath the earth's surface. The production of cement that's used for homes, skyscrapers, streets and other hardscapes around the world releases an enormous amount of carbon dioxide.

Explanation:

If a human embryo develops with a mutation that prevents smooth muscle from developing in the body and it survives to birth, the bodily functions that will be most heavily affected by this mutation are: Digestive system functions. So, option B is  accurate.

Smooth muscle plays a crucial role in the digestive system, as it lines the walls of various organs such as the stomach, intestines, and blood vessels. It is responsible for rhythmic contractions, called peristalsis, that propel food through the digestive tract and facilitate the absorption of nutrients. Without functioning smooth muscle, the ability of the digestive system to properly move and process food would be significantly impaired, leading to digestive complications and potential nutrient absorption issues.

While smooth muscle is also involved in other bodily functions, such as muscular movement (c) and blood vessel constriction/dilation, the digestive system functions would likely be the most heavily affected in this scenario. The heart (a) primarily consists of cardiac muscle rather than smooth muscle, and bone functions (d) are primarily regulated by other types of cells and tissues.

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Prokaryotic organisms are unicellular organisms that lack a nucleus and other membrane-bound organelles. They are found in the domains Bacteria and Archaea.

There are many components present in prokaryotic organisms. Some of them are discussed below:

Cell wall: This is a tough, protective layer that surrounds the cell membrane in bacteria and archaea. The cell wall is made up of peptidoglycan in bacteria and other materials in archaea.

Flagella: It is a whip-like structure that is used by many prokaryotic cells to move. The flagellum rotates like a propeller, allowing the cell to swim through liquid environments.

Pili or fimbriae: These are short, hair-like structures that extend from the surface of many prokaryotic cells. They are used for attachment to surfaces or other cells.

Capsule: It is a protective layer that surrounds the cell wall of some prokaryotic cells. The capsule is made up of a gel-like material that helps the cell to avoid being engulfed by immune cells such as macrophages.

Ribosomes: They are the site of protein synthesis in prokaryotic cells. Ribosomes are made up of two subunits that come together to form a functional ribosome.In conclusion, components that are present in prokaryotic organisms are cell wall, flagella, pili or fimbriae, capsule, and ribosomes.

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Most commonly, catabolic mechanisms like glycolysis that degrade energy molecules to create ATP need NAD+.

NAD+, an oxidizing agent that takes electrons from other molecules to become reduced, is present in cells in two different forms.

As a result of this reaction, NADH is produced, which can be employed as a reducing agent to provide electrons.

To supply energizing electrons for the electron transport chain, NADH is needed.

Therefore, ADP and NAD + molecules that form during cellular respiration have less energy than molecules they were produced from.

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Answer:ADP and NAD+ is correct

Explanation:

cytoplasm and plasma membrane

Pseudopodia are formed by some cells of higher animals (e.g., white blood corpuscles) and by amoebas. During amoeboid feeding, pseudopodia either flow around and engulf prey or trap it in a fine, sticky mesh.

The  fraction of time have modern humans been on this planet would be

4 × 10⁻⁸, therefore the correct answer is option A.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

As given in the problem we have to find out for what  fraction of time have modern humans been on this planet,

The  fraction of time have modern humans been on this planet would be

4 × 10⁻⁸, therefore the correct answer is option A.

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