You are looking at a slide of skin under the microscope. You accurately determine that you are looking at a mole by the increased numbers of melanocytes in the______________.

Answer:

B

The discovery of DNA and genes would imply that traits come from genes, which are found in DNA. Mutations create variations, which prove Darwin's theory to be correct; if natural selection was a random process that made organisms better suited to their environment, then there would not be genetic variability in any organisms.

A pedigree is a representation of a family history tracking a trait and  showing the inheritance pattern of the trait and its expression. The whole progeny expresses unattached earlobes.

The autosomal recessive trait is the characteristic that is coded by a gene located in an autosomal chromosome (this is, not a sex chromosome).

This trait is recessive because it is coded by the recessive allele, meaning that the dominant allele hides its expression.

The presence of only one dominant allele in the genotype is enough for the idividual to express free earlobes.

             Genotype                                  Phenotype    

EE, Homozygous dominant                  Free earlobes

Ee, Heterozygous                                  Free earlobes

ee, Homozygous recessive                   Attached earlobes

The pedigree is the representation of a family history conserning a certain trait. In this case, attached earlobes.

The pedigree shows the expression -and inheritance pattern- of the trait through several generations.

To correctly interpret a pedigree, we need to know that

Family members

→ Individuals are represented with geometrical figures.

→ Males are squares

→ Females are circles

Trait/Phenotype

→ Healthy/normal/not affected  individuals are represented with empty figures

→ Affected/mutated individuals are represented with solid black figures

Generations

→ Each file is represented with a roman number, indicating the Generation.

In the exposed example, we will assume that

According to this pedigree,

I- 1- man with attached earlobes (shaded)

I- 2- woman with unattached earlobes (empty)

II-1 - man with attached earlobes (shaded)

II-2 -woman with unattached earlobes (empty)

II-3 - man with attached earlobes (shaded)

II-4- do not have information

II-5 - woman with unattached earlobes (empty)

III-1 - man with attached earlobes (shaded)

III-2 - woman with attached earlobes (shaded)

III-3 - man with attached earlobes (shaded)

III-4 - no information

III-5 - No information

III-6 - woman with unattached earlobes (empty)

Since we so not have enough information, we will assume

Individual III-6 is a woman that expresses unattached earlobes. Since we do not know her genotype (homozygous or heterozygous), we will represent it as E- ⇒ The symbol - represents either the dominant or recessive allele.

This woman marries a man who was homozygous for unattached earlobes, EE.

Cross:

Parentals)  E-    x     EE

Gametes) E   -     E     E

Punnett square)  E       -

                    E     EE     E-

                    E     EE     E-

F1) 50% homozygous dominant EE

     50% is expected to be either homozygous dominant EE or heterozygous Ee

     100% is expected to have unattached earlobes.

Their whole progeny is expected to express unatached earlobes, because the father (EE) can only provide dominant alleles, and the simple presente of a dominant allele is enought to express the dominant trait.

IMPORTANT NOTE:

Up to this point we consider shaded shapes as individuals carring the trait attached earlobes. So, according to this reasoning, all shaded individuals must express the recessive trait and genotype ee.

However, according to the provided explanation, shaded individuals express the dominant trait.

If this is the case, individual III-6 is homozygous recessive ee expressing attached earlobes.

When she marries a homozygous dominant man expressing unattached earlobes EE, their children will only be heterozygous Ee and express unattached earlobes.

You will find both options in the attaced files. In any case, the whole progeny expresses unattached earlobes.

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Answer:

all of their children would have unattached earlobes

Explanation:

Neurons and mature red blood cells do not divide. Skin cells and stomach cells grow and divide rapidly and regularly.

Neurons are cells of the nervous system that do not have centrioles because the centriole is an important organelle for cell division.

Red blood cells do not have nuclei or other organelles required for DNA and RNA synthesis. So they can't divide.

Skin cells lose dead cells every day. So they divide rapidly and regularly to replace the lost cells to prevent infection.

The cells lining the stomach undergo wear and tear during food absorption, digestion, and waste elimination. So these cells also divide rapidly and regularly to replace the lost cells.

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Explanation:

The small ribosomal subunit has cleft in the upper third, and it the subunit which binds to the -AGGAGGU - sequence of the mRNA molecule. The large subunit is more complex and has two protuberances, a valley and a stalk as well as a polypeptide exit site.

All are the ways in which DNA does not differ with RNA.

All living cells comprise of ribonucleic acid (abbreviated RNA), a nucleic acid with properties that are comparable and different to those of DNA. However, RNA is often single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of alternate phosphate groups and the sugar ribose.

A single-stranded molecule called RNA has a shorter nucleotide chain than other molecules. DNA is self-replicating; it reproduces itself. RNA cannot duplicate itself. In the same way that DNA damage causes checkpoints that lead to apoptosis, damaged RNA may merely interfere with a cell's normal functions or it may cause apoptosis.

LSM1 of budding yeast is an additional gene with a putative function in RNA damage control. Resistance to UV light results from the deletion of LSM1.

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Lighter colored mice were more likely to avoid predators and to reproduce. Therefore, option (D) is correct.

The lighter brown coloration of the deer mice in the Sand Hills of Nebraska is likely an adaptation that provides them with a survival advantage in their specific habitat. The light, sandy soil in the area may offer better camouflage for lighter colored mice, making them less visible to predators and increasing their chances of survival.

As a result, these mice would have a higher likelihood of successfully reproducing and passing on their lighter coloration traits to future generations.

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Answer:

She has to get la man with a type AB group

Explanation:

Because the woman is a type B group

Answer:

3:1 (Tall=75%)(Short=25%)

pH indicates the level of H+ ions, where low pH indicates too many H+ ions and high pH. However, different body fluids have different pH values.

pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic.

Low-pH water will corrode or dissolve metals and other substances. Pollution can change a water's pH, which in turn can harm animals and plants living in the water.

The abnormalities in acid-base balance are of two types: acidosis and alkalosis. In acidosis, the blood pH is low or there is too much acid in the blood, while in alkalosis, the blood pH is high or there is too much base in the blood.

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Answer:

The seven characteristics that Mendel evaluated in his pea plants were each expressed as one of two versions, or traits. Mendel deduced from his results that each individual had two discrete copies of the characteristic that are passed individually to offspring. We now call those two copies genes, which are carried on chromosomes. The reason we have two copies of each gene is that we inherit one from each parent. In fact, it is the chromosomes we inherit and the two copies of each gene are located on paired chromosomes. Recall that in meiosis these chromosomes are separated out into haploid gametes. This separation, or segregation, of the homologous chromosomes means also that only one of the copies of the gene gets moved into a gamete. The offspring are formed when that gamete unites with one from another parent and the two copies of each gene (and chromosome) are restored.

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Answer: invasive species don’t help each other

Explanation:

The resting phase of the cell cycle is called interphase.

Interphase is a critical stage in the cell cycle during which the cell prepares for division by going through different activities such as growth, DNA replication, and protein and organelle production. It is the longest phase of the cell cycle and is separated into three subphases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).

The cell develops in size, synthesises RNA and proteins, and performs its regular duties during the G1 phase. The cell enters the S phase after passing through the G1 checkpoint. The DNA of the cell is reproduced during the S phase, resulting in the production of two identical copies of each chromosome.

This ensures that during cell division, each daughter cell receives a complete set of genetic material. The cell enters the G2 phase after DNA replication, where it continues to expand and prepares for mitosis.

Interphase is not a real resting phase because the cell is actively engaged in multiple cellular functions. However, because the cell is not visibly dividing at this period, it is commonly referred to as the resting phase.

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The correct answer is option a) 5 TAAGCCATT 3.

During DNA replication, the new strand is synthesized in the 5' to 3' direction, opposite to the direction of the template strand. The sequence of the newly synthesized strand is complementary to the template strand, meaning that each nucleotide in the new strand pairs with its complementary nucleotide in the template strand.

In this case, the template strand has the sequence 5 AATGGCTTA 3. The complementary sequence of adenine (A) is thymine (T), and the complementary sequence of cytosine (C) is guanine (G). Therefore, the sequence of the newly synthesized strand will be:

5' - TAAGCCATT - 3'

Note that this sequence is complementary to the template strand and is written in the 5' to 3' direction. Option a) correctly depicts this sequence. Option b) is the same as the template strand, and option c) is identical to the original strand. Option d) is not the correct complement to the original sequence.

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Aquaculture as a form of farming is always characterised by the farmer's efforts to increase the rate and calibre of aquaculture species' growth.

Contrasted with commercial fishing, which includes capturing wild fish, aquaculture involves raising populations of freshwater, brackish water, and saltwater species in Aquaculture or semi-natural environments.

Systems of culture and rearing in which human intervention is focused on stock reproduction in addition to capture are referred to as extensive aquaculture. These approaches, as opposed to fishing, allow for the selective expansion of production of the species that are most in demand by humans.

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Answer:  The correct answer is The farmer tries to improve growth rate and quality of aquaculture species.

Explanation:  This answer has been confirmed correct.

Aquaculture involves the farmer taking specific actions to improve the growth rate and quality of the species that they raise in captivity.

1. The absence of a nucleus also affects the functions of prokaryotic cells.

2. Bioengineers can create artificial tissues and organs using principles of mass transfer.

3. The use of genetically modified (GM) food is controversial due to several reasons such as safety concerns, Environmental impact, Ethical considerations, and Labeling and consumer choice.

4. Importance of Biomaterials in Bioengineering Compatibility with Biological Systems are controlled Drug Delivery, Tissue Engineering and Regenerative Medicine.

5. Ethical Issues in Biotechnology are Manipulation of Living Organisms, Human Enhancement and Designer Babies etc.

1. Prokaryotic cells are limited in several ways due to the lack of a nucleus. First, they do not have a well-defined organelle structure, so their metabolic processes are not as efficient as those in eukaryotic cells.

They also have limited control over gene expression since their DNA is not contained within a membrane-bound nucleus. This lack of control over gene expression can be both a limitation and an advantage for prokaryotic cells.

2. Bioengineers can use principles of mass & heat transfer to address a wide range of problems in human health. For example, they can develop drug delivery systems that use controlled release mechanisms to optimize the dosage & timing of medication delivery.

3. The use of genetically modified food is controversial for several reasons. Some people are concerned about the potential health risks associated with consuming genetically modified organisms (GMOs).

Others worry about the impact of GMOs on the environment, including the potential for unintended consequences such as the spread of modified genes to non-modified organisms.

4. Biomaterials are an important part of bioengineering because they provide the foundation for many medical devices & tissue engineering applications.

Biomaterials are synthetic or natural materials that are used to replace or repair damaged tissues or organs in the body. They can be used to create implants, artificial organs, or scaffolds for tissue regeneration.

5. Biotechnology raises more ethical issues than many other fields in engineering because it involves manipulating living organisms & their genetic material.

Some of the ethical issues that arise in biotechnology include concerns about the safety & efficacy of genetically modified organisms, the potential for unintended consequences & environmental impacts, & the social & economic impacts of biotechnology on society.

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Among the given options, the statement that Abigail is most likely to include on the flyer for acupuncture aftercare is C. "The dog or cat may exhibit sleepiness for a day or two after treatment."

Abigail is tasked with creating an aftercare flyer for new patients after their first acupuncture treatment at a holistic veterinary clinic. The purpose of the flyer is to provide helpful information to owners and minimize the need for phone calls and inquiries.

This statement is relevant and important because it informs pet owners about a common post-treatment effect of acupuncture, which is temporary sleepiness in their pets.

By including this information, Abigail can prepare owners for this normal reaction and alleviate any concerns they may have. It helps manage their expectations and ensures that they don't worry unnecessarily if their pet appears sleepy after the treatment.

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Autotrophs and heterotrophs differ in that the latter depends on external sources for their foods while the former has the capacity to synthesize their own foods.

Autotrophs are living organisms that have the capacity to synthesize their own foods. They are able to do so by a process known as photosynthesis.

Autotrophs have the capacity to use radiant energy from the sun to manufacture carbohydrates because they possess a green molecule known as chlorophyll.

Heterotrophs, on the other hand, have no capacity to synthesize their foods. Thus, they depend on external sources. They can be herbivorous, carnivorous, or omnivorous that feed on plant only, meat only, or both plant and meat respectively.

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"The derived shared characteristic 'Terrestrial during all stages' should be placed at the base of the tree diagram."

SupThe characteristic "Terrestrial during all stages" is a shared characteristic among all five species being compared in the branching tree diagram. This means that it is a characteristic that all of these species have in common, and therefore it is likely that it was present in their common ancestor.

Since the base of the tree represents the common ancestor of the species being compared, it makes sense to place this characteristic at the base of the tree. This also helps to show that this characteristic is a defining trait of the group of species being compared and that it has been present in their lineage since their common ancestor.

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Answer: decrease in biodiversity - loss of habitat

Explanation:

Answer:loss of habitat and decrease in biodiversity

Explanation:

Answer:

D

Explanation:

Crayfish depend upon small invertebrates for survival. If there is a large decrease in the number of small invertebrates, then there aren't enough nutrients to go around, and so crayfish that don't get nutrients will start dying out.

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The question is unclear, is there more to it?

I cannot answer this question without knowing the circumstances, but it is good to remember that mutualism is where both species and/or participants benefit, and parasitism is where one species benefits and the other one is harmed.

Think of mutualism like the word mutual, so when people say " the feeling is mutual" it means that both parties feel and/or express the same feelings. Parasitism should be thought of like a parasite. When one is infected or has contracted a parasite, the parasite will live off of its host body making it ill or even causing death as it drains resources from its host to benefit itself.

Answer:

Three functions of ovaries are listed below:

1. Oocytes (the female gamete) need to be protected and given refuge by the ovaries in order to be fertilised.

2. To create the hormones relaxin, inhibin, oestrogen, and progesterone.

3. Ovulation, the process by which each menstrual cycle results in the release of one egg.

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Explanation:

Answer:

A. X-inactivation

The use of radon studies will help the scientists to get an idea about many scientific ideas. The purpose of studying radon pollution levels is to improve air quality and human health. Correct answer is option B.

The level of harmful substances on environment that are causing adverse effects on atmosphere dealing with the harmful effects and their side effects.

To improve air quality and human health the studies of radon to pollution levels will help to study about the air quality and the human health.

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Answer:

B. Pollution and boat traffic

Explanation:

The ocean ecosystem is most impacted by pollution and boat traffic. Thus, option C is correct.

Aquatic environment with concentrated saline conditions, including open oceans, deep sea oceans, and coastal marine ecosystems, each with assorted physiological and biological features.

Marine ecosystems are consist of biotic and abiotic factors. Biotic factors include living organisms, including plants, animals, and microorganisms. Abiotic factors include non living things, including amount of nutrients, availability of gases, sunlight, temperature, and pressure.

But pollution and boat traffic has direct and deadly effect on wildlife. after consumption of microplastic thousands of animals live sea turtles and seals are killed. Nitrogen emitted by boats in oceans disturbs the ecosystem. Therefore Option C is correct.

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Answer:

B and C

Explanation:

Diffusion happens across the concentration gradient, the gradient goes from high to low concentration. This is natural and requires no energy. The only type of diffusion that requires energy is called active transport, this is when molecules move from low to high.

Answer:

B and c

Explanation: