Which of these is NOT found in prokaryotic cells?

A. Nucleus

B. Cytoplasm

C. Ribosomes

Gene expression can be described as the type of control that blocks the production of mRNA.

Gene expression can be described as the ability of a gene to be transcribed and translated. The expression of a gene depends on the requirement of the protein that it forms in the body.

If a protein that is synthesized by a particular gene is already present in enough amounts in the body, then the gene expression needs to be stopped. This can be done by blocking the synthesis of mRNA. If mRNA synthesis is blocked, the no ore proteins that were being formed from the expression of that gene will be able to form.

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Answer:

Salmon act as an ecological process vector, important in the transport of energy and nutrients between the ocean, estuaries, and freshwater environments

Answer:

ethylene

Explanation:

It is the simplest of the alkenes, consisting of two carbon atoms connected by a double bond.

Answer: The altitude of Polaris when it is viewed from the top of new york state's mt. Marcy is 44 degrees.

Explanation:

The self-regulating process by which an organism can maintain internal stability while adjusting to changing external conditions is known as homeostasis.

To provide energy to the body's cells, the bloodstream transports glucose, a type of sugar produced by the digestion of carbohydrates and other foods. Glycogen is primarily stored in the liver as unutilized glucose.

The hormones insulin, glucagon, and others fluctuate to maintain normal blood sugar levels. Blood sugar levels can fall too low called hypoglycemia or rise too high called hyperglycemia if either too little or too much of these hormones are present.

After a meal, blood glucose levels typically rise. Cells in the pancreas release insulin when blood sugar levels rise. This causes the body to absorb glucose from the blood and returns blood sugar levels to normal. The pancreas other cells release glucagon when blood sugar drops too low, causing the liver to convert stored glycogen back into glucose and release it into the blood. As a result, blood sugar levels return to normal.

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The liver with its histologic composition as mostly epithelial tissue, is a glandular organ that functions to secrete many substances to the blood or digestive tract, detoxify chemicals and synthesize molecules utilized by all the cells of the body.

What is an epithelial tissue?

An Epithelial tissue is one of the four tissue types in living things. Epithelial tissues are thin tissues that cover all the exposed parts of the body form ing the external skin, the inner lining of the mouth, the ventricular system of the brain,  the lining of hollow parts of every organ such as the heart, lungs, eyes, ears, secretory glands, the urogenital tract, as well as the ventricular system of the brain and central canals of the spinal cord, digestive tract etc.

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Calmodulin binds to calcium ions in smooth muscle cells, resulting in the contraction of the tissue.

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Most people's height is determined primarily by a combination of genetic variants with modest effects on height, as well as a smaller contribution from environmental factors (such as nutrition).

More than 700 such gene variants have been identified, with many more expected. Human characteristics such as height, eye color, and hair color vary slightly because they are controlled by many genes, each of which contributes a small amount to the overall phenotype. Height, skin color, and eye color are three examples of polygenic traits in humans. Multiple genes control these characteristics. Polygenic traits do not follow Mendel's pattern of inheritance because multiple genes are involved.

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In terms of plate tectonics, metamorphic rocks in the process of forming is found in the place or area where the plates meet.

This type of rock are formed when the preexisting ones are transformed into a new one and they are formed deep in the earth or at the area where the tectonic plates sue to increase in temperature, pressure etc.

Metamorphic rock is formed from the combination of  of these factors. The rock is present deep within the Earth or where tectonic plates meet which is what is responsible for the combination of different elements in other to form a new one.

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One rhed (region of high electron density) is in a molecule that contains 3 atoms that has 1 triple bond, 1 single bond and no lone pairs on any of the atoms.

Higher electron density indicates that a part of the molecular structure, such as resonance or inductive processes, is moving the negative charge toward an atom or group of atoms in the molecule. A reduced electron density in an atom or group indicates that a feature of the molecular structure is dispersing negative charge. Triple and double bonds are included in the list of high electron density regions. One area of high electron density is an unpaired electron. You can employ any of the resonance structures for molecules or ions that have them. There is only one area of high electron density in a molecule with three atoms, one triple bond, one single bond, and no lone pairs on any of the atoms.

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Complex wind patterns that change direction and vary the way sand is piled upon the dune are what cause these dunes to grow.

By shifting the wind's direction, the sand accumulates on several sides of the dune and is prevented from achieving the angle of repose, which prevents the dune from collapsing.

The bigger sand grains will be dumped in front of any obstructions on the shore and driven up them, while smaller grains of sand are frequently dropped behind them. Sand ridges begin to grow as a result of this process and can eventually turn into a sand dune.

The wind energy environment regulates dune field patterns. The geographical distribution of continental rivers and the accessibility of sand are further critical elements influencing dune formation and evolution.

Problems such as the disappearance of the flora that covers the surface of dunes can be brought on by house and industrial growth, as well as by the use of mechanical instruments and garbage dumping on beaches.

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Answer:

Any kind of plant, really!

Explanation:

Plants pursue photosynthesis. Cactuses, Roses, Sunflowers, succulents!

Answer:

C

Explanation:

True, Typically, two groups are used in an experiment, and one is contrasted with the other. The experimental group is the first group, and the control group is the second.

The independent variable that is being tested for is altered for the experimental group because they are given the test sample or go through the experimental process.

The independent variable is held constant for a control group because they do not participate in any experimental testing. On the basis of the aforementioned data, it can be deduced that the rats in the experiment are divided into two groups: those that get leptin are the experimental group, and those who receive no treatment are the control group.

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The endoplasmic reticulum is one of the structures that will be found in eukaryotic cells but not in the cells of bacteria.

What is a eukaryotic cell?

Every creature or cell with an identifiable nucleus. The nucleus of a eukaryotic cell, which houses the well-defined chromosomes (bodies holding the genetic material), is surrounded by a nuclear membrane.

Large and sophisticated creatures are made up of eukaryotic cells, which have a nucleus surrounded by the nuclear membrane. Eukaryotic cells are found in fungi, plants, mammals, and protozoa. They are categorized as belonging to the Eukaryota kingdom.

They can sustain diverse conditions within a single cell, enabling them to perform numerous metabolic processes. They are able to grow several times larger than prokaryotic cells because to this.

Hence it is the Endoplasmic reticulum that is not present in bacteria.

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Answer: Abiotic factors, which are the nonliving components, that describe a biome, include the climate, amount of precipitation, and soil type. On the other hand, biotic factors, which are the living components, include the plant and animal life.

Explanation:

The concentration gradient will be in the direction from the cell to the outside of the cell .

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According to the definition of photosynthesis, the process only occurs in the chloroplasts using photosynthetic pigments like carotene, xanthophyll, chlorophyll a, and b.

Photosynthesis is a process used by all green plants and a few other autotrophic organisms to create nutrition from carbon dioxide, water, and sunlight. Oxygen is a byproduct of the photosynthesis process. In the presence of sunlight, which serves as a catalyst, the process' reactants are carbon dioxide and water, while its output is glucose and oxygen. By confining a leaf in a closed, transparent chamber and monitoring the decline in carbon dioxide content as a function of time, the rate of photosynthesis may be calculated.

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In  gene a mutant, causes oligodendrocytes to enwrap sections of axon so that nodes of ranvier are more closely spaced then they will travel slower.

The fundamental physical and functional unit of heredity is a gene. DNA constitutes gene. Some genes serve as instructions for producing molecules known as proteins. Many genes, however, do not code for proteins. From a few hundred DNA bases to more than 2 million bases, human genes can range in size. Between 20,000 and 25,000 genes are thought to be present in humans, according to the Human Genome Project, a multinational scientific project that aimed to decipher the human genome's sequence and catalog its genes.

Each gene is present in two copies in every person, one from each parent. Less than 1% of all genes are slightly variable from person to person, but the majority of genes are the same in all people.

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Answer:

The Carbon cycle is the biogeochemical cycle by which carbon is exchange among the biosphere, Pedosphere, geosphere, hydrosphere, and atmosphere of the Earth

I Hope I'm right

Blood type can also be called blood group. The most commonly used blood grouping system is the ABO blood group system. According to it, there are four types of blood groups: A, B, AB and O. This classification is made on the basis of presence or absence of certain antibodies and antigens.

Genotype is defined as the genetic composition of an organism. It depicts the complete set of genome.

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Answer:

Abiotic factor: Water | Biotic factor: Trees

Explanation:

Abiotic factors are non-living components within an ecosystem. Biotic factors are living organisms within an ecosystem. By removing the abiotic factor, water, an ecosystem will drastically decline. Just like humans, plants and animals depend on water. When drought hits, food supplies can be reduced and habitat compromised. Damage may be temporary, and habitat and food supplies may return to normal once the drought is over. By removing the biotic factor, trees, an ecosystem will suffer from material loss and climate change. Without trees, the land would be hot and dry, and dead trees would inevitably lead to large wildfires. This causes sun-blocking soot to blanket the skies, leading to years of crop failure and global famine.

Answer:

False.

Explanation:

In the given Punnett Square, while there are two offsprings with the recessive trait, the dominant trait will show up. This means that they will carry the trait, but the recessive trait will not show.

Dominant trait is defined as "the characteristic that appears in an offspring".

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At high latitudes, the polar cell is influenced by a high-pressure system at the poles and easterly winds.

The Polar cells, which extend between 60 and 70 degrees north and south to the poles, are the smallest and weakest cells. At the surface of these cells, air dips over the highest latitudes and flows outwards toward the lower latitudes.

The polar cell is formed when a portion of the air rising near 60° latitude diverges at great altitude toward the poles. The Hadley cell's high-level air is collided with at 30° latitude while the remainder travels toward the equator.

The surface winds of the Ferrel cell feed warm, moist air from the tropics into the northern hemisphere. The Polar cell then encounters this as it moves south and is chilly and dry.

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Answer:

they attract the water molecules still in the plant, helping to pull water up through the stems from the roots

The type of inheritance pattern that is best described when indicating a recessive allele that causes a human genetic disorder called phenylketonuria associated with different genes which encode for the same trait is Pleiotropy (Option d).

Pleiotropy is a genetic phenomenon in which one gene alters the phenotypic expression of more than one simple trait, thereby ending the same product for different features in an organism.

Therefore, we can conclude that Pleiotropy is a genetic phenomenon that occurs when the allele of a gene encodes a product that affects more than one phenotypic trait.

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