A nonsense mutation occurs in the 267th codon of a gene that encodes a 500 amino acid protein. How many amino acids does the mutated polypeptide contain?.

Answer:

Mitosis is when the mother cell makes two daughter cells but Meosis 1 makes two daughter cells with there chromosomes shaped in Xs and Then Meosis 2 It continues to make more daughter cells from meosis 1s daughter cells

Explanation:

Answer:

The lowest measurable sea-level pressure is found at the centers of tropical cyclones and tornadoes, with a record low of 870 mbar (87 kPa; 26 inHg).

Answer:

if these are your choices:
desert
beach
sea level
mountaintop

its mountaintop

Explanation:

Answer:

Co-dominance

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

In Genetics, co-dominance can be defined as a phenomenon in which two (2) alleles of the same gene are present in a living organism and both are equally expressed to a degree or simultaneously.

This ultimately implies that, co-dominance is a phenomenon that typically involves the relationship between alleles i.e the two (2) versions of a gene present in living organisms. Also, a single version of a gene expressed by a living organism is referred to as an allele.

Hence, if there are three phenotypes present: Red, White, and BOTH RED AND WHITE, that means that the heterozygous shows both traits and you can think of it as having two "dominant" traits. This is an example of co-dominance.

Answer:

According to Chargaff's rule, if a DNA strand has 30% guanine before to semi-conservative replication, the  percentage of thymine that will have each new strand after replication will be 20% (option A).

Explanation:

A DNA molecule stores the genome of a living organism in a specific sequence of its nitrogenous bases adenine, guanine, cytosine and thymine. By knowing the percentage of a nitrogenous base in the DNA, the percentage of the other bases can be established using Chargaff's base pair rule.

Chargaff was able to establish that in a DNA molecule the ratio purine:pyrimidine is 1:1, so there must be the same amount of guanine as cytosine and a similar amount of adenine for thymine, taking into account the complementarity of the bases.

According to the base pair rule, if in a DNA strand there is 30% guanine, in the molecule there is:

In this case, Chargaff's rule is useful to determine the percentage of thymine that each new strand will have after replication, corresponding to 20%.

A person take in oxygen and take out CO2, the physical movement involved in this activity is called respiration.

The process of breathing in oxygen and exhaling carbon dioxide is generally referred to as respiration. But, in a more technical sense, the phrase refers to the chemical process that organisms undertake to liberate energy from food, which often entails the intake of oxygen and the emission of carbon dioxide.

Respiration is chemically the inverse of photosynthesis, which utilizes energy from the Sun to create organic molecules. Because the great majority of species need the oxygen produced by photosynthesis for respiration, photosynthesis and respiration are ecologically linked.

Most species on land, in freshwater, and in the seas, including plants, now employ cellular respiration to get the energy they require to live, develop, and reproduce.

The majority of energy in the biosphere is generated by photosynthesizing organisms. Some of that energy is then acquired by organisms such as animals that eat photosynthesizing organisms (called herbivores), which are then consumed by other organisms such as animals (carnivores), or by organisms that consume dead organisms (decomposers) to obtain energy for growth, reproduction, and other functions.

The chemical process of aerobic (with oxygen) respiration, also known as cellular respiration, is used by these creatures to derive energy from their food. Cellular respiration utilizes organic molecules from food (for example, the sugar glucose) and oxygen to create energy and heat, which are stored in the molecule adenosine triphosphate (ATP). Carbon dioxide and water are also produced during cellular respiration.

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Epithelial tissue can be classified according to cell shape and number of layers.

Epithelial tissues can be described as the tissues which form the outer covering of skin.

With concern to cell shape, epithelial tissues are divided into three main categories:

With concern to the number of layers, the epithelial cells are classified into two broad categories:

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Answer:

B. separating strands of DNA

Gel electrophoresis used for separating strands of DNA

Electrophoresis can be defined as a technique used to separate molecules of DNA, RNA or protein molecules on the basis of their electrical charge and size

Below are four major components of gel electrophoresis:

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Answer:

Description

Since its inception, life on earth has had to adapt to changing environmental conditions - this represents a driving force of evolution.

This module examines how organisms detect and respond to changes in their environment, and reviews the different behavioural, physiological and molecular mechanisms underpinning environmental (stress) adaptation.

Understanding these organism-environment interactions forms the very foundations of ecology. Examples are provided from a range of organisms, but a specific focus is given to terrestrial invertebrates (insects) and plants.

The term “environment” covers a broad spectrum of spatial scales, from changes occurring at the cellular level, to large scale geographic differences between major climatic zones (polar, temperate and tropical).

The process of “change”, and adaptation to these changes, will in turn be discussed across a broad spectrum of timescales. These include:

The requirement for rapid adaptation to potentially dramatic shifts in environmental conditions, e.g. when a parasite first enters its host

Longer-term changes and adaptations across seasonal timescales, e.g. hibernation/insect diapause

Adaptation on an evolutionary timescale, e.g. the ‘Red Queen’ hypothesis, across scenarios of past environmental changes, and extending out to current predictive climate change models

The main aims of this module are to provide students with information, guidance, and access to resources, that will allow them to:

Gain an in depth understanding of how organisms respond and adapt to changes in their environment.

Recognize that the term “environment” covers a continuum of spatial scales from molecular environments within cells, to broad-scale geographic environments and climatic zones.

Appreciate that adaptation to environmental change for an individual organism is transient and occurs across a temporal spectrum of seconds to seasons. For species, adaptation is long-term, but not fixed/permanent, and occurs across a timescale of generations.

Interpret the potential impact of climate change on species, communities and ecosystems. Specifically with respect to how the rate of environmental change may limit effective adaptation, and so result in changes in species distribution and abundance patterns

Become effective independent learners, capable of analysing and interpreting the scientific literature to help formulate and express their own ideas

Explanation:

hope it help to you read rhis to answer your question po

As the character is recesive and humans are diploid, the idividual must have both alleles with the information for red-green colour deficiency if she is a woman, or the only allele with that information if he is a man; this is because the gene for colour deficiency is located on the sexual chromosome X.

Therefore, if both grandmothers have the allele for colour deficiency but they have a heterozygous genotype, neither of the grandparets would have colour blindness, even though, they could give their offspring the red-green colour deficiency allele.

To sum up, 0 grandparents can be red-green colour deficient (but at least one must have the corresponding allele) and have a grandson/daughter with red-green colour deficiency.

Answer:

apes such as chimpanzees

Answer:

Natural selection is when a animal adapts to the area around it and it passes its genes down to it offspring

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Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.

Homeostasis is the body's ability to maintain a stable internal environment despite external changes.

In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.

These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.

For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.

Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.

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Answer:

B- news cells are produced

Explanation:

False

Explanation:

NASA uses telescopes to study stars

Answer:

A

Explanation:

The only answer that makes sense is A. Her hypothesis could've been wrong, for starters. That does NOT mean she's a bad scientist or should she come up with an excuse on why the results didn't support it. The best way to go about it would be either repeating the experiment multiple times and then changing one variable and testing that too.

Carbon dioxide and oxygen cannot pass through but move in and out

Answer:

After fertilization, a single cell divides successfully to form a multicellular structure. What happens next in order for this structure to develop tissues and organs to meet the needs of the organism? The cells undergo differentiation into particular body parts.

A multicellular organism develops from a single cell (the zygote) into a collection of many different cell types, organized into tissues and organs. Development involves cell division, body axis formation, tissue and organ development, and cell differentiation (gaining a final cell type identity).

Explanation:

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The steps required in chronological order for DNA repair mechanisms are as follows:

1. Recognize the damaged base(s)

2. Remove the damaged base(s)

3. Repair the gap with DNA polymerase and DNA ligase

4. Perform DNA recombination

5. Facilitate strand invasion

It's important to note that not all steps may be involved in every DNA repair mechanism. The specific order and combination of these steps can vary depending on the type of DNA damage and the repair pathway involved.

Initially, the damaged base(s) need to be recognized by specific DNA repair proteins. These proteins identify and locate the damaged regions in the DNA molecule.

Next, the damaged base(s) are removed. There are different mechanisms for this step depending on the type of DNA damage. For example, base excision repair (BER) involves the removal of a single damaged base, while nucleotide excision repair (NER) removes a stretch of nucleotides containing the damage.

After the damaged base(s) are removed, the gap in the DNA strand is repaired. DNA polymerase synthesizes a new complementary strand to fill the gap, and DNA ligase seals the nick to ensure the integrity of the DNA molecule.

In some cases, DNA recombination may be necessary for DNA repair. This step involves the exchange of genetic material between different DNA molecules, which can help in repairing damaged regions.

Lastly, facilitating strand invasion may occur during certain repair processes, such as homologous recombination. This step involves the invasion of a homologous DNA molecule to facilitate repair and exchange of genetic material.

It's important to remember that not all of these steps are used in every DNA repair mechanism. The specific order and involvement of these steps depend on the particular repair pathway and the type of DNA damage being repaired.

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The protons are pumped across the inner mitochondrial membrane from the inner matrix to the intermembrane space by the energy employed in the electron transport chain, creating a significant gradient in the hydrogen concentration. When it was discovered, this process was known as chemiosmosis.

The inner or cytoplasmic membrane controls the flow of nutrients, metabolites, macromolecules, and information into and out of the cytoplasm and preserves the proton motive force necessary for energy storage. It is impermeable to polar molecules.

Proteins that are essential for mitochondrial energetics and apoptosis are found in the intermembrane region between the outer and inner membranes (process of programmed cell death). The inner membrane is significantly less permeable to ions and molecules than the outer membrane.

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An exercise physiologist would study the human body at the organ system level.

Anatomy and physiology are two important fields of study that provide the foundation for exercise physiology. Anatomy deals with the structure of the body, while physiology focuses on the function of the body's organ systems.

By understanding the structure and function of the human body at the organ system level, exercise physiologists can design effective exercise programs that target specific physiological adaptations, such as improvements in cardiovascular fitness, muscular strength, and endurance. Additionally, exercise physiologists may also study the body at the cellular and molecular levels to gain a deeper understanding of the physiological mechanisms that underlie exercise-induced adaptations.

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Answer: I'm doing the same homework. I'm pretty sure that the 6 hexagons are the startch glucose. Try page 2

Explanation:

Each monomer is correctly connected to its polymer in the attached image in which amino acid is attached with protein, the nucleotide is connected to DNA, the fatty acid is attached to fat or lipid, and glucose or sugar is attached to carbohydrates.

Monomers are the basic unit or building blocks of larger molecules known as polymers. Polymers are made up of two or more monomers or long chains of monomers attached together.

The macromolecules are polymers and made up of their particular monomers:

Thus, the correct answer is attached as the image.

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The axial complex of echinoderms is a characteristic feature of their body plan, which plays an important role in their overall organization and functioning.

It is composed of three distinct chambers, each of which gives rise to specific parts of the echinoderm body plan. These chambers are the coelomic cavities, which are formed during embryonic development.
The first chamber is the oral coelom, which gives rise to the oral tube feet and other structures involved in feeding and digestion. The second chamber is the aboral coelom, which gives rise to the aboral tube feet, spines, and other structures involved in locomotion and protection. The third chamber is the axial sinus, which is located at the center of the axial complex and plays a key role in fluid circulation and waste removal.
Together, these three chambers form the axial complex of echinoderms, which is essential for their survival and adaptation to their environment. By allowing for efficient movement, feeding, and waste removal, the axial complex helps echinoderms to thrive in diverse marine ecosystems. Overall, the development and functioning of the axial complex is a fascinating area of study in echinoderm biology, and one that continues to yield new insights into the evolution and diversity of these fascinating creatures.

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Answer:

b

Explanation:

because the more predators less prey and less organisms

It seems unlikely that biodiversity will result in fewer prey animals surviving in the environment due to the diversity of predators. So, the correct option is B.

The variety of all living things and how they interact with one another and the environment are referred to as biodiversity. Along with species diversity both inside and between them, this also refers to ecosystem and landscape diversity.

Because it helps ecosystems function and provide services like pollination, nutrient cycling, or climate management, biodiversity is significant. For human communities, it also has significant cultural, social, and economic importance.

The range and variety of life on Earth is referred to as biodiversity or biological diversity. A measure of variation at the levels of genes, species, and ecosystems is called biodiversity.

Therefore, the correct option is B.

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If we are studying a histone complex that contains an unusually high level of modification with acetyl groups, then we can conclude about the nucleosomes containing this histone complex contain actively transcribed genes, i.e., they are subject to epigenetic regulation (Option E).

Epigenetic regulation is the control of gene expression due to chemical modifications in the DNA  and associated histones (methylation in the case of DNA, while histone modifications are diverse and they also include histone acetylation).

Therefore, with this data, we can see that epigenetic regulation also involves histone acetylation which is able to increase the transcription of genes by opening the chromatin structure in the heavily acetylated chromosome regions.

Complete question:

You are studying a histone complex that contains an unusually high level of modification with acetyl groups. What can you conclude about the nucleosomes containing this histone complex?

A. DNA is tightly bound to these histones.

B. Histone acetylation leads to degradation of histone tails and alteration of nucleosome structure.

C. They are part of heterochromatin.

D. They are most likely derived from a condensed Barr body.

E. They contain actively transcribed genes.

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Answer:

ice cube hopes this hope

Answer:

Skin color, a polygenic trait, is also determined by environmental factors.

Explanation:

In humans, skin color or pigmentation is a polygenic trait and is also determined by environmental factors such as exposure to the sun.

Polygenic traits are the traits which are controlled by two or more genes located on different chromosomes. For example, height, skin color, and color of the eyes.

John and Pat carry identical DNA however they exhibit different interaction of the polygenes and working conditions (environmental factors). For example, John works in a movie theatre and thus does not have much exposure to sun whereas Par works on the beach which is an open area and thus experience a lot of exposure from the sun.  

Exposure to the sun leads to the darker skin and thus polygenic interactions and different environmental conditions lead to the variation in skin pigmentation in John and Pat.

Answer:

D and 4

Explanation:

Answer:

Its D and the last one is 4

Explanation: