Jesse is walking on the sand at the beach one summer day. If heat is not flowing between her feet
and the sand, which of the following must be true?
A. The sand is wet.
B. The sand is too cold for heat to flow.
C. The sand is the same temperature as her feet.
D. There is no friction between her feet and the sand,

Bioaccumulation is the total accumulation of certain chemicals/contaminants in an organism, coming from diverse sources such as water, air, and diet. Therefore the case of mercury occurs when mercury is accumulated in an organism, for example, fish. The most common pathway for this to happen is through the food chain, nonetheless can occur through abiotic means, an example is in fish, where methylmercury is acquired through the gills.

When methylmercury is absorbed through the gastrointestinal tract & enters the bloodstream and goes rapidly to other parts of the body.

Mercury is a persistent substance, which can bioaccumulate, in living organisms, inflicting increasing levels of harm on higher-order species such as predatory fish and fish-eating birds and mammals through a process known as "biomagnification"

The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depending on its chemical form and route of exposure.

The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife that have been exposed to mercury through the ingestion of contaminated lower organisms.

King mackerel, marlin, orange roughy, shark, swordfish, tilefish, ahi tuna, and all contain high levels of mercury.

Human activity is the main cause of mercury release, especially coal-fired power stations, residential coal burning for heating and cooking, industrial processes, waste incinerators, and as a result of mining for mercury, gold, and other metals.

Reducing consumption of raw materials and products generating mercury releases

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Answer:

b. 2

Explanation:

Gene's come in different varieties called alleles

Answer:

Yes

Explanation:

Butterfly is an insect and Insects are of Kingdom Animalia so Yes, butterfly is an animal having characteristics of an insect.

Matching the items to the correct number list  a. mitochondrial matrix b. oxygen c. mitochondrial inner membrane d. glycolysis e. 1 f. oxidative phosphorylation g. water h. cell membrane.

Substrate-level phosphorylation occurs in the cytoplasm of cells (glycolysis) and in the mitochondria (Krebs cycle). .

So. substrate level-mitochondrial inner membrane

Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP by the transfer of a phosphate group from a substrate directly to ADP or GDP. Transferring from a higher energy (whether phosphate group attached or not) into a lower energy product.

The cytosol contains dissolved nutrients, helps break down waste products, and moves material around the cell. The nucleus often flows with the cytoplasm changing its shape as it moves. Cytosol is known as the matrix of the cytoplasm. It surrounds the cell organelles in eukaryotes.

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Answer:

Well for one photosynthesis gives out oxygen. This makes all animals able to live. So in that way it helps us and the world around us. Without photosynthesis we also could not eat food. No animals could live and no plants ould live. VERY IMPORTANT!

Explanation:

eccrine sweat glands.Eccrine sweat glands are the major sweat glands found abundantly on the skin especially in palms

Hope it helps

1. Blood circulation

2. Heat generation

3. Support

4. Movement

5. Protection

Hope that helps!

Answer:

Lower; higher

Explanation: Speciation is a term used to describe the formation of new, distinct and diverse set of characters and organism as evolution occurs in lineages of an organism.

The higher the number of lineages the higher the number of diverse characters and features. That is what makes the speciation to be lower in the chances of extinction to be higher as the lineages Increase from lineage 1 to lineage 2.

Answer:

D. Some traits in certain embryos disappear as the embryo develops

Explanation:

I don't know how I would explain it, but I can list some of the things that disappear such as...  Gill slits, and tails. Hope this helped :D

Answer:

D. Some traits in certain embryos disappear as the embryo develops.

Explanation:

Embryology is the study of embryos. Embryos of different animals such as mammals, birds, fish, reptiles etc. look alike that is they are very similar. Many traits of one type of animal appear in the embryo of another type of animal.

Paramecia and amoebas are both types of single-celled organisms, but they belong to different groups. Paramecia belong to the group of ciliates, while amoebas belong to the group of amoeboids. The main reason why paramecia cannot change shape like amoebas is due to their structural differences.

Paramecia have a fixed body shape and are covered in cilia, which are hair-like structures used for movement and feeding. These cilia beat in coordinated patterns, allowing paramecia to move in a characteristic spiraling motion. The rigid structure of paramecia's body and the presence of cilia restrict their ability to change shape extensively.

On the other hand, amoebas have a more flexible body structure. They can change shape through a process called amoeboid movement. Amoebas extend and retract pseudopodia, which are temporary projections of their cytoplasm, allowing them to move and change shape as needed. This flexibility is enabled by the absence of a fixed cell wall and the presence of a more fluid cytoplasm.

In summary, the structural differences between paramecia and amoebas, including the presence of cilia in paramecia and the ability to form pseudopodia in amoebas, determine their respective abilities to change shape.

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Complete question :

Why can't the paramecium change shape like the amoeba?

Answer:

Fermentation

Explanation:

Hope this helps!

The production of alcohol by yeast cells is the result of anaerobic respiration. The correct option is D).

All living cells undergo respiration, a chemical activity that releases energy from glucose. Without oxygen, anaerobic respiration occurs and produces less energy but does it more quickly. Fermentation refers to anaerobic respiration in microorganisms.

When you work out vigorously, your muscles engage in anaerobic respiration. Compared to aerobic respiration, less energy is released because glucose is not completely broken down.

During intense activity, lactic acid accumulates in the muscles. Later, the lactic acid must be oxidized to produce carbon dioxide and water.

Therefore, the correct option is D) Anaerobic respiration.

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The question is incomplete. Your most probably complete question is given below:

A) Darkness B) Aerobic respiration C) Photosynthesis D) Anaerobic respiration

Natural selection related to sexual reproduction as opposed to asexual reproduction: sexual reproduction results in many new gene combinations, some of which will lead to differential reproduction. The correct option is a.

The differentiating force of natural selection is influenced by sexual reproduction. Reproduction that is asexual produces offspring that are genetically identical to their parent. This means that all descendants inherit all of their parents' genetic material. In comparison to asexual reproduction, sexual reproduction produces offspring that contain a mixture of genetic material from both parents.

This makes each new individual genetically different from both its parents and other members of the population. This increases the possibility that some individuals would be better adapted to their environment than others. The offspring inherit a combination of genes from both parents, resulting in a greater variation in the population.

This variation may lead to the survival of some individuals with genetic adaptations that enable them to cope with changes in their environment, while others with unsuitable genetic adaptations would not be able to cope. In conclusion, natural selection is influenced by sexual reproduction because it results in many new gene combinations, some of which will lead to differential reproduction. The correct option is a.

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Brodmann area 17, or V1 for visual one, is the name most neuroscientists use to refer to the primary visual cortex of the brain. This area, which is part of the occipital lobe's calcarine sulcus, is crucial for vision.

Between your frontal and occipital lobes and above your temporal lobe is where your parietal lobe is situated. Your parietal lobe serves a variety of purposes. processing of sensory data.

One of the areas of the mammalian brain that has received the most research is the visual cortex, where the fundamental components of vision—detection of contrast, color, and movement—are merged to create our full and detailed visual sense.

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Answer:

wind and air movement

Explanation:

The step to take if the hypothesis was incorrect based on the results of your experiment is as follows: in your conclusion, use scientific reasoning to explain why your hypothesis may have been incorrect (option C).

Hypothesis is a tentative conjecture explaining an observation, phenomenon or scientific problem that can be tested by further observation, investigation and/or experimentation.

The hypothesis is an educated guess that helps to predict the potential outcome of an experiment.

However, since the hypothesis is testable and falsifiable, the results of the experiment do not always align with the hypothesis.

Therefore, the step to take if the hypothesis was incorrect based on the results of your experiment is as follows: in your conclusion, use scientific reasoning to explain why your hypothesis may have been incorrect.

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Answer:

Typical plant fats, such as sunflower oil and corn oil are Liquid in form and High in polyunsaturated fatty acid content.

Explanation:

Answer:

Only plants, as well as some fungi, bacteria, and algae, have a cell wall. It exists outside the cell membrane and has a tough, flexible, and sometimes rigid texture!

If the gametophyte of a moss dies, the sporophyte it produced will also die. The sporophyte is dependent on the gametophyte for nutrition and support, as it remains attached to it throughout its entire life cycle.

The gametophyte of a moss produces the sporophyte through the process of fertilization. The sporophyte remains attached to the gametophyte and receives nutrients from it through a specialized structure called the foot. The sporophyte also depends on the gametophyte for support, as it lacks the ability to produce its own food through photosynthesis. Therefore, if the gametophyte dies, the sporophyte will no longer receive the nutrients and support it needs to survive, and it will ultimately perish.

In summary, the sporophyte of a moss is completely dependent on the gametophyte for survival. If the gametophyte dies, the sporophyte will also die as a result.

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The correct answer is 0.2 micrometers. Since 5 single spaces of the ocular micrometer fit in one space of the stage micrometer. That is 5 single spaces of the ocular micrometer = 1 space of the stage micrometer (which stands for 1 micrometer).

Explanation:

Babies with Down syndrome have an extra copy of one of these chromosomes(trisomy),so basically it is problems with chromosomes-simply

Answer:

Measurements…maybe

This is defined as the basic unit of heredity and is usually passed from parent to offspring.

The most appropriate association of correct number of genes affecting phenotypes can be seen above.

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Galactose is a sugar that is used as a carbon source by certain organisms. In yeast, the gene GAL1 encodes an enzyme that is necessary for the metabolism of galactose. Transcription of the GAL1 gene is regulated by the Gal4 protein, which binds to specific sites in the upstream activating sequence (UAS) of the gene.

Mutations in the Gal4-binding sites can affect the ability of Gal4 to bind to the UAS and regulate GAL1 transcription. In the absence of galactose, the deletion of one Gal4-binding site in the GAL1 UAS element may reduce the efficiency of Gal4 binding but is unlikely to completely abolish it. Therefore, there may be a slight decrease in GAL1 transcription, but it will not be significantly affected.

On the other hand, the deletion of all four Gal4-binding sites in the GAL1 UAS element is likely to have a more significant effect. Without any Gal4 binding, there will be no activation of GAL1 transcription, even in the presence of galactose. Therefore, this mutation will completely abolish GAL1 transcription.

In summary, mutations in the Gal4-binding sites of the GAL1 UAS element can have varying effects on GAL1 transcription, depending on the number of sites deleted and whether galactose is present or not.

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The term that refers to the exchange of gases and other materials between the circulatory system and tissues of the body or the outside world is known as "capillary network."

Capillaries are small blood vessels that are positioned in the body's tissues. They serve as a connection between the arterioles and venules of the circulatory system. The exchange of gases and other materials between the circulatory system and the tissues of the body or the outside world occurs in the capillary network.

The capillary network is responsible for the exchange of oxygen, carbon dioxide, and nutrients between the blood and surrounding tissues. They are located in close proximity to the cells, allowing for efficient exchange. The capillary network is essential for maintaining proper tissue function and homeostasis.

The capillary walls are thin and permeable, allowing for easy diffusion of gases and nutrients. The exchange of materials occurs passively, as the concentration gradients of the materials dictate their movement. Overall, the capillary network plays a crucial role in maintaining proper tissue function and overall health.

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Answer:

do you have the pic?

Explanation:

Answer:

DNA replication is said to be semi-conservative because of this process of replication, where the resulting double helix is composed of both an old strand and a new strand. ... Semiconservative replication would produce two copies that each contained one of the original strands and one new strand.

Explanation:

Each of your cells, whether you're a rat, tomato, bacterium, or human, will contain DNA (with some rare exceptions, such as mature red blood cells in humans). The genome is a set of instructions that is present in every cell in its entirety. Numerous factors lead scientists to examine DNA: They can determine how the instructions contained in DNA support the healthy operation of your body. DNA may be used to create novel medications, and crops can be genetically modified to resist insects.

They can identify criminal suspects, and they can even reconstruct evolutionary histories using ancient DNA!

Scientists often use one of the various DNA extraction kits offered by biotechnology companies to extract the DNA from a cell.

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Dna replication is semi-conservative meaning each of the two original dna strands serve as templates for building the two new strands.

The process by which a double-stranded DNA molecule is replicated to generate two identical DNA molecules is known as DNA replication. Because when a cell divides, the two new daughter cells must have the same genetic material, or DNA, as the parent cell.

The process of creating two identical daughter strands of DNA is known as DNA replication. DNA replication occurs in eukaryotic cells' nuclei and in prokaryotic cells' nucleoid region. Prior to cell division, DNA replication occurs during the S phase of the cell cycle.

DNA replication involves a certain sequence of processes. Each event is facilitated by a different enzyme.

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The rate of population change for the whales and the seals over the full length of the study is 10 whales per year and 10 seals per year, respectively.

Assume the initial population of whales was 100 and the final population after 10 years was 200.

The total change in population for the whales would be 200 - 100 = 100.

Similarly, let's say the initial population of seals was 500 and the final population after 10 years was 600.

The total change in population for the seals would be 600 - 500 = 100.

Now, to calculate the rate of population change, you divide the total change in population by the total change in time, which is 10 years in this case.

For the whales: Rate of population change = (100 whales / 10 years)

= 10 whales per year.

For the seals: Rate of population change = (100 seals / 10 years)

= 10 seals per year.

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Aug; methionine is the initiator triplet in both prokaryotes and eukaryotes, and it recruits methionine amino acid. So, option D is correct.

Methionine Aug is the initiator triplet in both prokaryotes and eukaryotes Methionine is desired by the codon AUG, which is additionally called the begin codon. Thus, methionine is the primary amino corrosive to dock in ribosomes amid the union of the proteins.

Tryptophan is interesting since it has amino acids specified by a single codon. Methionine is one of the essential amino corrosives.

It's required to create the protein and other compounds in your body. Methionine could be an amino corrosive. Amino acids are the building squares that our bodies utilize to form proteins. Methionine is found primarily in meat, angel, and dairy products.

It is the arrangement of proteins from mRNA. The protein blend can be isolated into three steps, comparative to mRNA union: Start, Stretching, and Termination.

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