Question 1 of 10
What is the goal of a conclusion?

Answer:

The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), and thymine (T).

Explanation:

Triploid watermelons are produced by crossing a tetraploid strain with a diploid plant because the resulting hybrid cell contains an uneven number of chromosomes that cannot be divided evenly during meiosis, resulting in a nonviable gamete.

To produce triploid watermelons, a tetraploid (4n) strain is crossed with a diploid (2n) plant. This hybridization produces a triploid (3n) individual. The reason for this is that during meiosis, homologous chromosomes pair up and separate, resulting in four haploid gametes.

However, in a hybrid cell with an uneven number of chromosomes, this process cannot occur evenly, resulting in a gamete that is nonviable. As a result, the remaining three gametes will be viable and will contain an uneven number of chromosomes, resulting in a triploid individual.

In a cross between a heterozygous purple-flowered plant and a white-flowered plant, the expected ratio of genotypes among the F1 offspring is 1:1 for heterozygous purple-flowered plants and homozygous white-flowered plants, and the expected ratio of phenotypes is 1:1 for purple-flowered and white-flowered plants.

A pedigree showing two sons and two daughters produced by a red-green color-blind father and a homozygous mother with normal color vision would reveal that all the daughters are expected to be carriers of color blindness, and none of the sons are expected to be color-blind.

This is because the gene responsible for red-green color blindness is located on the X chromosome, and males only inherit one X chromosome from their mother, making them more susceptible to X-linked recessive disorders.

Daughters, on the other hand, inherit two X chromosomes, one from each parent, and only need one copy of the mutated gene to be a carrier.

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Triploid watermelons are produced by crossing a tetraploid strain with a diploid plant and because the resulting hybrid cell contains an uneven number of chromosomes that cannot be divided evenly during meiosis, resulting in a nonviable gamete.

A tetraploid (4n) strain and a diploid (2n) plant are crossed to create triploid watermelons. Triploid (3n) individuals are the result of this hybridization. This is because four haploid gametes are produced when homologous chromosomes link up and split during meiosis.

The expected ratio of genotypes in the F1 offspring of a cross between a heterozygous purple-flowered plant and a homozygous white-flowered plant is 1:1, and the expected ratio of phenotypes is 1:1 for purple-flowered and white-flowered plants.

Because the gene for red-green color blindness is located on the X chromosome and males only inherit one X chromosome from their mother, they are more susceptible to X-linked recessive disorders.

A pedigree showing two sons and two daughters born to a red-green colorblind father and a homozygous mother with normal color vision would show that all the daughters are expected to be carriers of color blindness while none of the sons are expected to be color blind

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Answer:

either -20.01 or -1.79

Explanation:

-9/11-10/9=-20.01

9/11-10/9=-1.79 it is probably the 20.01 answer.

Answer:He contributed to the discovery of cells while looking at a thin slice of cork

Explanation:

Robert Hooke (1635-1703) is an English physicist. He contributed to the discovery of cells while looking at a thin slice of cork. He then thought that cells only exist in plants and fungi. In 1665, he published Micrographia

Answer:

Hi there! Robert Hooke used a microscope to view cells for the first time in 1665, he saw the thick cell walls of a cork sample, which comes from trees.

Explanation:

Hope this helped!

The answer is B.

Reason:

The Aleutian Arc volcanism is the result of the active subduction of the Pacific Plate beneath the North American Plate.

Answer: Hello!

The region is affected by a subduction zone, the region may have active volcanoes, and that the region is close to a convergent boundary. From the map it can be seen that the region is close to the continents, therefore, it is possible that there is the boundary of tectonic plates surrounding it. One can also see the presence of islands, thus, it is quite possible that there lies a subduction zone close to them. This also demonstrates that the boundary is convergent, as transform boundaries do not result in elevation. Close to the convergent boundaries, one can witness recurrent volcanoes and shallow earthquakes.

Explanation:

Mark me brainest please. Hope I helped! Hope you make an 100%

-Anna♥

Answer:

B

Explanation:

Answer:

The second option (i think)

Explanation:

Chromosomes are the things that make organisms what they are. They carry all of the information used to help a cell grow, thrive, and reproduce. Chromosomes are made up of DNA. Segments of DNA in specific patterns are called genes.

Answer:

thx

Explanation:

If proteins that should be synthesized in the rough endoplasmic reticulum are being synthesized on free ribosomes in the cytoplasm, then this would most likely be due to a lack of ER signal sequence in the amino acid sequence of the protein.

Eukaryotic cells are cells that have a nucleus enclosed by a nuclear envelope and membrane-bound organelles that carry out specialized functions.

Ribosomes are responsible for protein synthesis, which can occur in the cytoplasm or on the surface of the endoplasmic reticulum (ER).

Free ribosomes in the cytoplasm are responsible for synthesizing proteins that are intended to function within the cytoplasm or the nucleus, while ribosomes on the rough ER are responsible for synthesizing proteins that are intended to be secreted from the cell or to be present within the cell membrane.

The signal sequence within a protein is responsible for directing the protein to the correct location within the cell. The signal sequence binds to the signal recognition particle, which transports the ribosome to the surface of the ER, where the protein is synthesized into the ER lumen.

However, if the protein lacks the ER signal sequence, it will not be directed to the rough ER for synthesis but will instead be synthesized on free ribosomes in the cytoplasm.

Therefore, the most likely reason that proteins intended for synthesis on the rough ER are being synthesized on free ribosomes in the cytoplasm is due to a lack of ER signal sequence in the amino acid sequence of the protein.

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Answer:

heterotrophs

Explanation:

they cannot make food on their own.

Photosynthesis is a process by which plants and animals make their food in the presence of sunlight, water and carbon dioxide.

True

The brain and spinal cord make up the central nervous system.

All of the body's components are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system. The nerve cell, or neuron, is the building block of the neurological system. There are around 100 billion neurons in the human brain.

A neuron has a cell body, which contains the cell nucleus, as well as distinct extensions known as axons and dendrites (pronounced AK-sonz) (pronounced DEN-drahytz). Nerves are collections of axons that are present throughout the body. Neurons can communicate even across great distances because of their axons and dendrites.

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Answer:

only depends on the human some can be mature for only being 15 and others it's 40 but it only depends on the mind of said person

Answer:

the answer is D

Answer:

D

Explanation:

Photosynthesis' whole point is that it makes its own food in order to grow.

Answer:

Children (6-13 years): very rare

Teenagers (14-18 years): very rare

Young adults (19-40 years): rare

Adults (41-60 years): very common

Seniors (60+ years): very common

Answer:

The average age for menopause, in the US, is 51. It can happen any time in your 40s-50s too, though.

Explanation:

Answer:

predators

Explanation:

Answer:

Explanation:

Example of making qualitative observation is that as i observed that one litre of water weighs 1000g and one litre of ethanol weighs 789g so it is an example of quantitaive observation

Answer:

Microevolution

Explanation:

I just know

Answer:

biosphere is the highest level.

Explanation:

Answer:

global ecological system

Explanation:

It is the highest level of organization. It is the global ecological system which consists of all the living organisms and other factors which supports life. Biosphere mainly refers to the part of the earth’s crust. This was a brief introduction to the Ecological Levels of Organization in an ecosystem.

Answer:

Mid Atlantic Ridge theory

Explanation:

I learned about this a last term.

Answer:

It is Continental Drift Teory (pretty much it is too late for me to answer)

Explanation:

I found this on microsoft and on quizllet. It is acutually correct! Hope this helps to anyone that is viewing this!!

Answer:

Most hormones circulate in blood, coming into contact with essentially all cells. However, a given hormone usually affects only a limited number of cells, which are called target cells. A target cell responds to a hormone because it bears receptors for the hormone.

Answer:

According to toppr

   Receptors are specific proteins located on target tissues to which specific hormones bind to produce their effect.

   Binding of a hormone to its receptor leads to the formation of a hormone-receptor complex. Formation of Hormone-Receptor complex leads to certain biochemical changes in the target tissue.

   Hence Receptor site responds to a hormone.

   So, the correct answer is 'Receptor'.

Not my own words, I have cited so I am not plagerizing

Explanation: :)

The type of rejection described is acute humoral rejection, which is primarily due to the presence of preformed antibodies in the recipient's blood.

These antibodies recognize and bind to antigens on the surface of the transplanted kidney, activating the complement system and causing inflammation and damage to the blood vessels. This leads to the deposition of immunoglobulin and complement proteins in the blood vessel walls, as observed in the histological examination.

Acute humoral rejection is a rare but severe complication of kidney transplantation, and it can occur within minutes to hours after transplantation. It is more common in patients who have previously undergone kidney transplantation, blood transfusions, or pregnancies.

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The type of microbes that is most similar to animals in terms of cellular structure and metabolism is the protozoa. Option 2 is correct.

Protozoa are unicellular eukaryotic organisms that share similarities with animals in terms of their cellular structure and metabolic processes. Like animals, protozoa have membrane-bound organelles, including a nucleus, mitochondria, and other specialized structures. They also possess a flexible cell membrane, allowing them to move and respond to stimuli in their environment.

In terms of metabolism, protozoa obtain energy through various pathways similar to animals. They can undergo aerobic respiration, utilizing oxygen to produce ATP. Some protozoa can also engage in anaerobic metabolism under low-oxygen conditions. Additionally, protozoa can ingest and digest organic matter, similar to animal feeding habits. Option 2 is correct.

The complete question is

Which of the following types of microbes is most similar to animals in terms of their cellular structure and metabolism?

1. Bacteria

2. Protozoa

3. Fungi

4. Archaea

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All DNA polymerases have an open right-hand-like fundamental structure made up of subdomains called the palm, fingers, and thumb. The palm's active sites include amino acids that are crucial for catalysis. Nucleotide-binding and recognition depend on the fingers.

A class of enzymes known as DNA polymerases is responsible for catalysing DNA synthesis during replication.

DNA polymerases' major function is to efficiently and properly replicate the genome to maintain the genetic code and ensure that it is faithfully passed down through the generations.

DNA polymerase (pol) is a tiny, two-domain eukaryotic DNA polymerase. During the repair of simple base lesions, each domain provides an enzymatic activity (DNA synthesis and deoxyribose phosphate lyase). The terms "polymerase domain" and "lyase domain" are used to describe these domains.

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Answer:  

The deposition of acidifying air pollutants causes acidification of surface waters (lakes, rivers and streams) and forest soils, leading to loss of nutrients such as potassium and magnesium from soils and the release of toxic aluminium into soils and waters, resulting in adverse effects on animals and plants.

Explanation:      

The tetrahedral intermediate is initially formed during the nucleophilic attack on the carbonyl carbon in a reaction. This intermediate is a transient species, meaning that it is very reactive and has a short lifespan. The tetrahedral intermediate has a tetrahedral shape, and the carbon atom in the center of the tetrahedron is sp3 hybridized.

The four atoms that are bonded to the central carbon are arranged in a tetrahedral geometry. The hybrid orbitals of the central carbon atom overlap with the orbitals of the nucleophile and the carbonyl oxygen atom to form new covalent bonds. The tetrahedral intermediate is formed before it collapses and re-forms the carbonyl functional group.

The structure of the tetrahedral intermediate initially formed in the reaction shown can be represented as shown below: \(\ce{R-C(H)=O + HNR2 -> R-C(H)(NR2)-O-H}\) where R represents an alkyl or aryl group. The tetrahedral intermediate formed after nucleophilic attack by the amine molecule.

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Answer:

3. Nucleotides

Explanation:

Answer:

I think the heat cools and the bloon is brought back down

Explanation:

hope this helps

Answer:

The bonds that will break at high temperature are hydrogen, ionic and Van der Waal's interactions. Covalent bonds will not break.

Explanation:

Answer:

Bonds in the tertiary structure of an enzyme include the covalent ,hydrogen, ionic , as well as Van der Waal's interactions.

An Enzyme is a chemical catalyst found in living organisms which helps to regulate the biochemical processes of the body. An example includes pepsin, ptyalin etc.When heat is applied to an enzyme, the unique structure is usually altered in the process known as Denaturation.

Bonds such as the hydrogen ,ionic and Van der waals force are broken when subjected to high temperatures. The covalent bond however , doesn't get affected or broken which is because it is stronger as a result of its formation involving the sharing of electrons.This makes it more stable and tightly held together.

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Answer:

Traits are determined by genes so it's the manifestation of a gene coded for the DNA :3

Explanation:

:3