Errors during meiosis can result in gametes with aneuploidy - abnormal number of chromosomes. If those gametes mate and the organism develops, a series of syndromes are attributed to an individual with aneuploidy. Provide an example of a disorder resulted from errors in meiosis. Is this disorder inherited? Explain.

                                                  Explanations:

Physical change: Physical change is like when the appearance of an object or whatever is changed, and doesn't look much different. Not in a completely new unrecognizable form/substance.

Chemical change: Chemical change is when the appearance of an object is fully changed, unrecognizable, and into a new form/substance

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Does it have legs? (Yes/No)

Yes: Go to 2

No: Go to 3

Does it have more than 4 legs? (Yes/No)

Yes: Grasshopper

No: Snake

Does it have eight legs? (Yes/No)

Yes: Spider

No: Grab

To formulate a dichotomous key using the given organisms (snake, grasshopper, crab, spider), we can follow this structure:

Does the organism have legs?

Yes: Go to question 2.

No: It's a snake.

Does the organism have more than four legs?

Yes: Go to question 3.

No: It's a grasshopper.

Does the organism have a hard exoskeleton?

Yes: It's a crab.

No: It's a spider.

This dichotomous key helps differentiate between the organisms based on their characteristics. By answering the questions sequentially, one can identify the correct organism.

It starts by determining if the organism has legs or not, leading to the snake if it lacks legs. If the organism has legs, the key proceeds to assess the number of legs, identifying the grasshopper if it has four or fewer legs.

Finally, the presence or absence of a hard exoskeleton distinguishes between the crab and spider, with a hard exoskeleton indicating a crab and its absence indicating a spider.

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Answer:

Sea levels during the ice age were higher than today is not true concerning the Pleistocene ice age.

Explanation:

The Pleistocene ice age was a period of repeated glaciations that occurred from about 2.6 million to 11,700 years ago. During this time, large ice sheets covered much of North America, Europe, and Asia, and sea levels were much lower than they are today.

Option A is true, as Earth began warming out of the ice age about 18,000 years ago, marking the end of the last glacial period and the beginning of the current interglacial period.

Option B is true, as the glaciers stopped advancing about 15,000 years ago, although some small glaciers still exist today.

Option D is true, as forests and grasslands became more common after the ice age, as the climate warmed and the glaciers retreated.

Option C is not true, as sea levels during the Pleistocene ice age were actually lower than they are today, due to the amount of water that was locked up in the continental ice sheets. As the glaciers melted and the water returned to the oceans, sea levels began to rise, eventually reaching their current levels.

Answer: option c

Explanation: I took the test

Answer:

hope it helps :)

Explanation:

Fermentation happens in anaerobic conditions. Fermentation begins with glycolysis which then breaks down glucose into 2 pyruvate molecules and produces two ATP and two NADH. Fermentation allows glucose to be continuously broken down to make ATP due to the recycling of NADH to NAD+.

Answer:

Explanation:

Using functional magnetic resonance imaging (fMRI), we measured brain activity of human participants while they performed a sentence congruence judgment task in either the visual or auditory modality separately, or in both modalities simultaneously. Significant performance decrements were observed when attention was divided between the two modalities compared with when one modality was selectively attended. Compared with selective attention (i.e., single tasking), divided attention (i.e., dual-tasking) did not recruit additional cortical regions, but resulted in increased activity in medial and lateral frontal regions which were also activated by the component tasks when performed separately. Areas involved in semantic language processing were revealed predominantly in the left lateral prefrontal cortex by contrasting incongruent with congruent sentences. These areas also showed significant activity increases during divided attention in relation to selective attention. In the sensory cortices, no crossmodal inhibition was observed during divided attention when compared with selective attention to one modality. Our results suggest that the observed performance decrements during dual-tasking are due to interference of the two tasks because they utilize the same part of the cortex. Moreover, semantic dual-tasking did not appear to recruit additional brain areas in comparison with single tasking, and no crossmodal inhibition was observed during intermodal divided attention.

Answer:

The main direct cause of biodiversity loss is land use change

The selected bone is the femur, which is the thigh bone in the human body. It is the longest and strongest bone in the body, and its form directly corresponds to its function.

The femur is a long, cylindrical bone with a slightly curved shape. This design provides strength and stability, allowing it to support the body's weight during standing, walking, and running. The femur's shape also enables it to resist bending and torsional forces, reducing the risk of fractures.

At the ends, the femur has rounded surfaces that articulate with the hip socket and the tibia, forming the hip and knee joints, respectively. These smooth, rounded ends facilitate smooth movement and provide a wide range of motion. Thus, the form of the femur, with its length, curvature, and articulating surfaces, is essential in supporting weight, resisting forces, and enabling mobility.

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Answer: B

Explanation:

Before asking a question that could lead to a scientific experiment, a scientist would most likely conduct background research and review existing knowledge on the topic.

Scientific research is built upon a foundation of existing knowledge and understanding. Before formulating a question that can be tested through an experiment, scientists typically conduct thorough background research to familiarize themselves with previous studies, theories, and observations related to their topic of interest.

This helps them gain a comprehensive understanding of the subject matter, identify gaps in knowledge, and formulate meaningful questions that can be investigated through scientific experiments. By conducting this preliminary research, scientists ensure that their questions are informed, and relevant, and contribute to the advancement of scientific knowledge in their field.

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Given that the volume of an egg in a 0% sugar solution is 810.538666666666. We are to find the % change in the volume of the egg to the nearest tenth (0.1).

First, we will determine the final volume of the egg when it is placed in the sugar solution.

Let's assume that the % change in volume is x. We know that the % change in volume is given by:

x = (Final volume - Initial volume) / Initial volume * 100

Substituting the given values, we get:

\(x = (V - 810.538666666666) / 810.538666666666 * 100.\)

Therefore, to the nearest tenth, the % change in the volume of the egg in the 0% sugar solution is given by:

\(x = (V - 810.538666666666) / 810.538666666666 * 100x = (V / 810.538666666666 - 1) * 100.\)

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Answer:

Also refered to as consumers, heterotrophs are organisms that obtain their energy (nutrition) from organic compounds/materials. In other words, they are organisms that are unable to produce their own food (unlike autotrophs) and therefore have to consume/ingest organic compounds as a source of energy.

Answer:

option 2, skin

Explanation:

Answer:

b skin

Explanation:

The following are the features that all chordates have at some point in their life are notochord, dorsal nerve cord, and pharyngeal sit. Therefore, the correct answer is notochord, dorsal nerve cord, pharyngeal sit.

Chordates are a phylum of creatures that possess a notochord, a dorsal nerve cord, and pharyngeal slits at some time in their lives. Animals like humans, birds, fish, amphibians, and reptiles are examples of chordates. They are divided into three subphyla: Urochordate, Cephalochordate, and Vertebrate.

Features of chordates:

Notochord: A notochord is a flexible rod located between the digestive tube and the nerve cord that supports the body.

A notochord's main purpose is to offer support throughout the chordate's development. It persists throughout the animal's life in some animals, but in most vertebrates, it is replaced by a vertebral column.

Dorsal nerve cord: The dorsal nerve cord is a nerve cord located above the digestive system that runs dorsally from the brain and is the animal's main nervous system. The dorsal nerve cord is hollow and develops from a plate of ectodermal cells that rolls into a tube during embryonic development.

Pharyngeal sit: Pharyngeal sit also known as pharyngeal clefts, are a series of openings found on the pharynx's lateral side. These are frequently modified into gills in aquatic animals or ear and neck in terrestrial animals. In humans, the pharyngeal slit forms the auditory tube, tonsils, thymus, and parathyroid glands.

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The features that all chordates have at some point in their life are "notochord," "dorsal nerve cord," and "pharyngeal slits."

Of the options you provided, the features that all chordates have at some point in their life are:

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Answer:

independent variable

Explanation:

Answer:

1)the process being studied in the picture is transpiration I guess

3)the pot is covered with plastic sheet to trap the water (vapour) which is being evaporated

Answer:

Explanation:

For further explanation refer to these websites!

Steps of taking a breath of air:

https://flexbooks.ck12.org/cbook/ck-12-biology-flexbook-2.0/section/13.31/primary/lesson/processes-of-breathing-bio/

The parts of the upper and lower respiratory system:

https://www.urmc.rochester.edu/encyclopedia/content.aspx?contentid=p01300&contenttypeid=85

In meiosis, homologous chromosomes separate in step a, which is called "anaphase I," and four haploid nuclei are formed in step b, which is called "cytokinesis II."

During anaphase I of meiosis, homologous chromosomes, which consist of one chromosome from each parent, separate and move toward opposite poles of the cell. This ensures that each resulting cell receives only one copy of each chromosome pair.

Anaphase I is a crucial step in meiosis as it ensures the distribution of genetic material between the daughter cells is randomized and contributes to genetic diversity.

Following anaphase I, the cell enters cytokinesis II, the second stage of cell division in meiosis. Cytokinesis II involves the physical separation of the two cells formed after anaphase I, resulting in the formation of four haploid nuclei, each containing a single set of chromosomes.

These nuclei go on to further undergo a process called "telophase II" to form four distinct haploid cells, known as gametes, which are essential for sexual reproduction.

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Answer:

six

Explanation:

Professor of Chemistry, University of Minnesota, Minneapolis. Oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv).

Answer:

6

Explanation:

The circulatory and muscular systems work together during running. it because the arteries bring oxygenated blood to the muscles to do cellular respiration while running.

An organs system is a group of organs and tissues that work together to carry out a specific function.

The circulatory system is an organ system responsible for transporting oxygen and nutrients in the blood.

The muscular system is composed of different types of muscles that contract during physical exercise.

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Answer:

A.

Explanation:

Animals migrate further south to warmer locations. Animals such as bears and squirrels come out of hibernation.

The ability to taste PTC is due to a single dominant allele "T". You sampled 215 individuals in a biology class, and determined that 150 could detect the bitter taste of PTC and 65 could not.

Generally,  To calculate the predicted frequency of the recessive allele (t), we use the equation:

f(t) = 1 - f(T)

where f(T) is the frequency of the dominant allele (T).

To find f(T), we use the equation:

f(T) = (number of individuals who can taste PTC / total number of individuals sampled)

f(T) = 150/215

= 0.7

f(t) = 1 - 0.7

= 0.3

The predicted frequency of the dominant allele (T) is 0.7

In a population of 10,000 people, assuming Hardy-Weinberg equilibrium, we can use the following equations to find the number of individuals who are heterozygous, homozygous dominant, and homozygous recessive:

f(TT) = (f(T))^2 f(TT) = (0.7)^2 = 0.49

f(tt) = (f(t))^2 f(tt) = (0.3)^2 = 0.09

f(Tt) = 2 * f(T) * f(t) f(Tt) = 2 * 0.7 * 0.3 = 0.42

Homozygous dominant = 4900 people Homozygous recessive = 900 people Heterozygous = 4200 people

Please note that these predictions are based on the assumption that the population is in Hardy-Weinberg equilibrium and not influenced by any external factors such as mutation or natural selection.

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The process that does not take place in the small intestine is option B: pepsin breaks down proteins to amino acids. Other options are incorrect because they are accurate descriptions of digestive processes that occur in the small intestine.

In option A, pancreatic lipase is responsible for breaking down fats into fatty acids and glycerol, which is essential for fat digestion. In option C, pancreatic amylase breaks down carbohydrates into simple sugars, aiding in carbohydrate digestion. In option D, bile, produced by the liver and stored in the gallbladder, emulsifies fats into smaller particles, allowing lipase to effectively break them down.

However, in option B, pepsin is an enzyme that functions in the stomach, not the small intestine. It breaks down proteins into smaller peptides but not directly into amino acids. Protease enzymes, such as trypsin and chymotrypsin, present in the small intestine, continue the process of breaking down proteins into amino acids for absorption.

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Answer:

2Ag⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s)

Silver nitrate and calcium chloride will react in a double displacement reaction (which has to produce a precipitate, a gas, or water to have a reaction).

This reaction will produce a silver chloride precipitate and a solution of calcium nitrate.

The reaction will be 2AgNO3(aq) + CaCl2(aq) -> 2AgCl(s) + Ca(NO3)2(aq)

To write a net ionic equation:

1. Write the balanced molecular equation.

  2AgNO3 + CaCl2 -> 2AgCl(ppt) + Ca(NO3)2

2. Write the balanced complete ionic equation.

To write the complete ionic equation:

- Start with a balanced molecular equation.

2AgNO3(aq) + CaCl2(aq) -> 2AgCl(s) + Ca(NO3)2(aq)

- Break all soluble strong electrolytes (compounds with (aq) beside them) into their ions

      indicate the correct formula and charge of each ion

      indicate the correct number of each ion

      write (aq) after each ion

- Bring down all compounds with (s), (l), or (g) unchanged.

2Ag⁺(aq) + 2NO³⁻(aq) + Ca²⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s) + Ca²⁺(aq) + 2NO³⁻(aq)

3. Cross out the spectator ions that are present. Spectator ions are ions that are present in the reaction mixture but do not participate in it. You can recognize spectator ions by looking for ions that are present on both sides of the equation.

4. Write the "leftovers" as the net ionic equation.

2Ag⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s)

Split-brain patients have undergone a surgery that severs the corpus callosum, the band of fibers that connects the two hemispheres of the brain. This means that information received through the right senses (ear, eye, or side of the body) is processed by the left hemisphere and vice versa. The correct answer is c)Speak about info received exclusively in their left hemisphere.

Split-brain patients are unable to speak about information received exclusively through their left hemisphere because that information cannot be transferred to the language centers in the left hemisphere for verbal expression. However, they can perform tasks that involve integrating logical and spatial information because both hemispheres are still able to process information independently. They may also have difficulty coordinating movements between major and minor muscle groups, but this is not a specific symptom of split-brain syndrome.

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Villi are the tiny finger-like projections that protrude from the walls of the small intestine, which is a part of the gastrointestinal (GI) tract.

The small intestine is a long, narrow tube that is located between the stomach and the large intestine, and it is the primary site of nutrient absorption in the digestive system. The walls of the small intestine are lined with millions of tiny villi that increase the surface area available for the absorption of nutrients from the food we eat. Each villus contains a network of blood vessels and a lymphatic vessel called a lacteal, which help to transport nutrients from the small intestine to the rest of the body. The villi also contain specialized cells called enterocytes, which are responsible for absorbing nutrients from the food we eat and transporting them across the epithelial lining of the small intestine. Overall, the villi in the small intestine play a crucial role in the digestion and absorption of nutrients from our food, making them an important structure in the GI tract.

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Answer:Sclerenchyma

Explanation:Sclerenchyma is thick walled dead lignified cells, they are hard and elastic. The sclerenchyma cells are divided into two groups namely fibers and sclereids. Sclerenchymatous fibers are branched/unbranched, long, hard, pointed cells with tapering ends, thick walls, and narrow lumen.

Answer:

Sclerenchyma is Greek word where "Sclero-" means hard and "enchyma" means infusion. This tissue consists of thick-walled, dead cells and protoplasm is negligible. These cells have hard and extremely thick secondary walls due to uniform distribution and high secretion of lignin and have a function of providing mechanical support

I hope that answers your question

Answer:

it is c

Explanation:

In order to determine whether you have hypoxia, your doctor will need to check the amount of oxygen in your blood. Therefore, option (C) is correct.

Hypoxia is low levels of oxygen in your body tissues. It causes symptoms like confusion, restlessness, difficulty breathing, rapid heart rate, and bluish skin.

Moreover, hypoxia is a state in which oxygen is not available in sufficient amounts at the tissue level to maintain adequate homeostasis; this can result from inadequate oxygen delivery to the tissues either due to low blood supply or low oxygen content in the blood (hypoxemia).

Hence, heart and lung function issues can lead to five categories of conditions that cause hypoxemia: ventilation-perfusion (V/Q) mismatch, diffusion impairment, hypoventilation, low environmental oxygen and right-to-left shunting.

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Answer:

The correct answer is "Glycogen stores would be depleted first, then stored lipids, and then structural proteins."

Explanation:

When an individual starts starving, the glycogen store is depleted first because that is the storage form of glucose. After depletion of the glycogen, the body then burns fat reserves in the body which are also good sources of calories. After prolonged period of starvation, the body then converts structural proteins (usually in the form of glucogenic amino acids) into fuels for energy.

It should be noted that NOT all the glycogen are used up immediately because the brain cells and the red blood cells prefer energy from glucose and hence the body reserves some glycogen strictly for them.

Answer:

its d on edge2021

Explanation: