This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true about individuals 3 and 4?
At least one is heterozygous for the trait.
They are both homozygous dominant for the trait.
They are both heterozygous for the trait.
At least one is homozygous for the trait.

Mitochondria and vacuoles perform distinct roles within a cell, with the mitochondria providing energy through cellular respiration, and the vacuoles storing water, nutrients, and waste and maintaining the shape of the cell. The energy provided by the mitochondria is critical for the function of the vacuoles, and indeed all other parts of the cell.

The mitochondria and vacuole in a cell carry out distinct but interconnected roles. The mitochondria, often called the 'powerhouse of the cell', is where cellular respiration occurs. This process converts energy stored in nutrient molecules such as glucose into adenosine triphosphate (ATP), a form of energy that the cell can use.

On the other hand, vacuoles serve as a storage and transport system. They not only store water, nutrients, and waste products, but also help in maintaining the shape of the cell. In plants, enzymes within vacuoles can break down macromolecules. Some vacuoles, known as contractile vacuoles, can excrete excess water and waste from the cell through a process called endocytosis, where the vacuoles merge with the cell membrane and expel waste into the environment.

While their functions may seem separate, the energy provided by the mitochondria is critical for the function of the vacuoles, and indeed all other parts of the cell. Thus, the mitochondria and vacuoles work together to ensure the cell can function and survive.

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Answer:

When discussing the Earth's magnetic field we could say that the Earth has a GEOMAGNETIC NORTH POLE. The magnetic field changes every several hundred thousand years and thus the north and south magnetic poles swap places. Hope this is the answer that you are looking for.

North Magnetic Pole

Explanation:

    The terrestrial magnetic field is what makes possible the existence of compasses, used for location in space. Thanks to this invention, the great navigations could happen.

    The dynamo theory is the most accepted for the explanation of the terrestrial magnetic field. According to this idea, iron and molten nickel, about 3,000 km deep, move around generating electrical currents that trigger the magnetic field.

Magnetic poles

     A magnet has a north pole and a south pole. The magnetic field generated by the magnets, which is the region near the magnet where another magnet or materials such as iron and steel are attracted, is represented by exiting the north pole and entering the south pole.

    When the magnetized needle of a compass aligns with the earth's magnetic field, the north pole of the needle points to the northern region of the planet and the south pole of the compass magnet points to the southern region of the planet.

    The attraction occurs only between different poles, that is, if the north pole of the needle points to the geographic north, it means that what we call geographic north is the magnetic south pole of the earth. Similarly, the geographic south pole of the planet must be the magnetic north pole. The image above reveals this inversion between the magnetic and geographic poles.

    The earth is a giant magnet, and its magnetic field protects us from particles from the sun.

The correct answer is option C

The small intestine known as Duodenum is the next organ in the digestive system. Liver comes before the stomach and the large intestine surrounds the small intestine and its function also starts when the di-gested food passes from the small intestine to the large intestine. Kidney is the part of urinary system and not the digestive system.  

Answer:

gall bladder

Explanation:

Answer:

genetic variation

Explanation:

trust in me

Answer: C. a population in Florida

As a biologists is writing about a report on group of rattlesnakes that all lived in the state of Florida. It is mentioning about the species of a particular snake but a group of organisms considering a group or organisms which breed with one another and produce offsprings that can reproduce together. All these features can be defined under a single term called as population. Members of species that are be breed with each other and can produce viable fertile offsprings is called as population. Therefore, in this report biologist is describing about population in Florida.

Answer:

The correct answer is option C, a population in Florida

Explanation:

The population description is an efficient language is termed as demographics. The descriptive components of the demographics are –  

a) Population Size – It gives the number of individuals within a population

b) Population Density – It defines the size of a population with respect to the space occupied by it

c) Age Structure of the Population – It categorizes different individuals in a population group to different age sections

d) Fecundity – It describes about an individual that is able to produce during a given period of time  

e) Morality – It gives the death and birth rate of a population

f) Sex ratio

Answer: The correct answer is -

c. the leg.

Skeletal muscle is one of three major categories of muscle tissues (other two being smooth muscle and cardiac muscle.

This is striated muscle tissue, which is voluntary in nature (therefore also termed as voluntary muscle) and lies under the somatic nervous system.

Majority of skeletal muscles are connected to bones with the help of tendons (which are bundles of collagen).

Skeletal muscles provide support to the body and assist in movement. This is because contraction of skeletal muscle allows pulling of tendons, which are basically attached to bone. This assist in movement of legs (such as walking, jumping).

This indicates that every physical activity performed by an organsim is related to skeletal muscle.

Thus, muscles associated with legs are example of skeletal muscles.

Therefore, option c) is the right answer.

Answer:

The correct answer is - test tube 4.

Explanation:

The sprig of Elodea produces carbon dioxide and oxygen after the incubation of 24 hours whereas the snail releases the oxygen in the test tube during the incubation period. The presence of both gases gives a yellowish color to the test tube solution.

Incubation is the process in which organisms or anything at a precise environment and temperature so it can develop properly.

Thus, the correct answer is- test tube 4.

The following is NOT a product of the Krebs Cycle is FADH2. The correct option is D.

The Krebs cycle is also called the tricarboxylic acid and citric acid cycle. This cycle works under aerobic conditions. This produces energy in bodies. Krebs cycle converts acetyl CoA molecules into NADH.

Pyruvic acid and acetyl-CoA combine to create glucose in this mechanism. The Krebs cycle, commonly known as the aerobic stage because it takes place in the presence of oxygen, is the second step of cellular respiration.

Given that anaerobic organisms cannot survive in the presence of oxygen, we might infer from this that not all living things participate in the Krebs cycle. NADH is not produced in this cycle.

Therefore, the correct option is D. FADH2.

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The correct answer is - d. all of the above.

The fish populations and other aquatic resources can be affected by multiple factors. The water temperature is a defining factor, if it is colder than lots of marine life will dye out and be replaced with other species, and vice versa, if its too warm lots of marine life adapted to colder conditions will die out. Diseases are always an impact factor in any environment, so if a dangerous, fatal, disease appears, it can demolish the populations of the aquatic organisms. The water quality is becoming an ever-growing concern, and that is because of the human activity. If the water gets polluted, or eutrophicized, the marine life will very quickly die out and leave empty waters behind it.

The correct sequence of events in gene expression is DNA to RNA to protein, starting with transcription and followed by translation. In transcription, DNA is transcribed into mRNA, which is then translated into a protein with the help of tRNA. cDNA helps in understanding an organism's proteins by representing only expressed genes.

The correct sequence of events in transcription and translation is DNA to RNA to protein. The process starts with transcription where DNA is converted into mRNA (messenger RNA). This happens in the nucleus of the cell. The mRNA then travels out of the nucleus to the cytoplasm where translation occurs. During translation, the mRNA is read by a ribosome, and tRNA (transfer RNA) brings the appropriate amino acids to create a polypeptide chain, which will fold into a functional protein.

The differences between a sequence of DNA and the sequence of mature mRNA include the removal of introns (non-coding regions) from the pre-mRNA during RNA processing, resulting in only exons (coding regions) being included in the mature mRNA. Additionally, a 5' cap and a poly-A tail are added to the mRNA for stability and regulation of translation.

Complementary DNA (cDNA) created by reverse transcribing mRNA can be particularly useful for understanding an organism's proteins because it represents only the expressed genes and skipping non-coding regions, allowing for a simpler analysis of the coding potential of a genome.

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Answer:

D: Telophase

Explanation:

Answer: Option D

Explanation:

At the time of DNA replication the nitrogenous bases used is thymine because DNA is the end product of replication.

Whereas, in case of translation the end product is mRNA in which the nitrogenous base used is uracil.

Both of the process combinely helps in cell division and formation of new cells.The proliferation of cell is very crucial and important step inside the cell.

The right answer is B. glaciers and polar ice caps.

The hydrosphere is the part of the globe occupied by water (or ice). it includes oceans, rivers, lakes, glaciers, polar ice caps...

Glaciers and polar ice caps are the only solid elements in the hydrosphere (rocks and minerals are not part of the hydrosphere but the lithosphere).

The hydrosphere includes materials that are not in liquid form, such as glaciers and polar ice caps, which are the largest stores of fresh water, greater than groundwater, lakes, and streams.

The materials included in the hydrosphere that are not in liquid form are glaciers and polar ice caps. These represent significant stores of freshwater and are part of the Earth's hydrosphere, even though they are in solid form. The largest store of fresh water in the hydrosphere is not the ocean, but rather glaciers and ice caps, followed by groundwater. The majority of Earth's freshwater is locked up in these reservoirs, vastly more than what is found in lakes and streams.

Answer: The correct answer for the blank is-

A. tropism.

Tropism is a biological process that indicates growth of a plant in a particular direction in response to any external stimuli (any change in the environment that induces a specific response in a biological system).

For example - Phototropism in plants is a type of tropism process in which plants tend to grow towards the direction of sunlight.

Thus, option A) is the right answer.

Protista is not valid under evolutionary classification because it's considered a paraphyletic group. In this kingdom, groups have closer common ancestors with groups outside of Protista than within it. This is inconsistent with evolutionary classification, which emphasizes common descent and shared ancestry.

The kingdom Protista is not valid under evolutionary classification primarily because this group is considered to be paraphyletic. A paraphyletic group consists of all the descendants of a common ancestor, excluding one or more groups. For instance, Protista includes various groups that hold the closest common ancestors in kingdoms outside of Protista, rather than within the same kingdom.

This is inconsistent with the principles of evolutionary classification, which emphasizes the concept of common descent. This approach to classification orders organisms based on their evolutionary relationships, meaning that all members of a particular group (whether it's a domain, kingdom, phylum, etc.) should share a most recent common ancestor that is not the ancestor of any organisms outside the group.

So, although some members of Protista are closely related, the kingdom as a whole does not meet these criteria, because it lacks that shared ancestry. Therefore, it is not recognized as a valid group in the current understanding of evolutionary classification.

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Answer: animals cell get energy by..

Animals obtain energy by eating plants. The only form of energy a cell can use is a molecule called adenosine triphosphate (ATP). Chemical energy is stored in the bonds that hold the molecule together. ADP can be recycled into ATP when more energy becomes available.

Explanation:

The cells of animals considerably rely on the process of cellular respiration in order to get energy.

Cellular respiration may be defined as a process through which cells of living organisms produce energy with the help of the breakdown of food molecules into simpler substances.

Cellular respiration, also known as aerobic respiration significantly involves the sequence of chemical reactions which initiate with the reactants like sugar (glucose) in the presence of oxygen in order to produce carbon dioxide, water, and energy. Here, the energy that is synthesized must be in the form of ATP.

Cellular respiration is again split into a variety of reactions like glycolysis, the Citric-acid cycle, oxidative phosphorylation, etc. But the ultimate aim of all remains the same which is the production of energy.

Therefore, the cells of animals considerably rely on the process of cellular respiration in order to get energy.

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Answer:

[tex]120[/tex] N-m

Explanation:

Work done is equal to the product of  mass of an object and the distance by which it is displaced.

Hence, mathematically the relationship between work done (W), Mass of an object (M) and its displacement (D) is equal to

[tex]W = M * D[/tex]

Substituting the given values in above equation, we get -

[tex]W = 20 * 6\\W = 120[/tex] N-m

Hence, work of [tex]120[/tex] N-m is done here

Answer:

Scientifc therory is the correct answer

Explanation: