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The sliding filament theory explains how muscles in the human body contract to produce force.

Scientists discover that under de microscopy changes in the sarcomeres as muscle tissue, they observed that during contraction one part of the sarcomere arrangement (named the "A band") remained in constant length. This band contains myosin filaments. On the other hand, the band that changes length is composed of actin filaments

The statement that is not true about recycling plastics is Only plastics marked with the #1 resin code can be recycled economically; option A.

Plastics are artificially produced materials that are polymers of organic compounds usually derived from petroleum.

Plastics are non-biodegradable, hence. they contribute a lot to environmental pollution.

In order to reduce environmental pollution from plastics, the plastics industry developed a means to reuse already produced plastic to make new plastics in a process known as recycling.

Plastics marked with the #1 and #2 resin code can be recycled economically.

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The Punnett square that represents Tt x tt is:

This means that

50% of the offspring will be homozygous for the allele t. That is, 50% of the offspring will be tt.

and

50% of the offspring will be heterozygous. That is, 50% of the offspring will be Tt.

We can conclude that the correct answer is:

Punnet Square:

In this case, we need to remember how we detect an optimum in enzyme activity. As the reaction accelerates and reaches the slope the optimum has been reached, when conditions keep changing after the optimum, the curve descends.

2a, here we have a thermophilous bacteria that lives at a high temperature so is natural that the optimum of an enzyme of this bacteria be at high temperatures as is the case of curve 3.

b. For this curve we have a slope around 30°C so this is the optimum temperature.

c. Here the curve is generated with a pH range, and the dynamics is the same that with temperature. The human stomach has a pH around 2, so the most likely slope that corresponds with human enzyme is curve 4.

Answer

A molecule that absorbs light and has a color

Explanation

A pigment is a generic term for a molecule that absorbs light and has a color. Plants contain many pigments, giving rise to the various colors we see. Flowers and fruits obviously contain a large number of organic molecules that absorb light. Leaves, stems and roots also contain a variety of pigments.

Clumping and creating plugs in the blood vessel injuries is the function of platelet to stop bleeding. When the skin is cut, the body starts to secrete platelet to stop the bleeding or form a clot until the wound is sealed. This is called positive feedback which contributes to the accelated formation of platelet that fill in the injured blood vessels and to prevent extreme blood loss.

Growing urbanization can lead to deforestation mainly in two ways. When people move from rural areas to the cities they tend to consume in a higher rate, because the ways of living in cities are different from those in rural areas. For people to consume more and to attend their urban needs (which includes electricity, piped water, constructions, etc), there is a need to extract more materials from nature that will be used in the processes that will make those things available. The second major impact of urbanization on deforestation is that the cities need to grow, and they grow taking land from natural forests and such. So, deforestation occurs to give place to the constructions and infrastructure needed in urban cities.

The vascular tissue of vascular plants is made up of various kinds of cells and components. The primary components of vascular tissue are the xylem and phloem.

Remember that the xylem transports water and dissolved mineral salts and the phloem transports sap made by cells and by photosynthesis.

Therefore, both the xylem and phloem form the vascular tissue of plants.

Now, the formation of the xylem and phloem is given by the vascular cambium. This vascular cambium produces xylem and phloem cells and originates from procambium that has not completely differentiated during the formation of primary xylem and primary phloem.

Now, Xylem can contain three types of elongated cells: tracheids, vascular elements or vessels (tracheae), and fibers. At maturity, when they perform transport functions, all these cells are dead.

Then, the cells of Xylem are:

- Tracheids.

- Tracheas or Vessels.

The phloem consists of two types of conducting cells: sieve tubes, which are the most characteristic elements, and annex cells.

The cells of Phloem are:

- Sieve cell and sieve tubes.

- Albumin cells.

- Companion cells

We can conclude that the correct answer is:

The elements that form Phloem are:

sieve elements, phloem fibers, and phloem parenchyma cells.

The elements that form Xylem are:

long tracheary elements, parenchyma, and fibers.

Renewable resources: Are the resources supplied by nature whose source is renewed by natural proccesses, in other words, they are not exhausted. Examples: Wind, sunlight, water.

Nonrenewable resources: Are the resorces of which we only have a certain amount, and an excessive use of them can lead to depletion. Examples: Coal, gas, petrolium.

Asthma is a type of respiratory disease in whcih the lung's air passages become too narrow and has excessive mucus production. This will lead a person to experience difficulty of breathing, coughing, and tightness in the chest area. Asthma attacks occur when it is triggered by allergens, strenuous activities, and stress.

We can suspect that Melissa probably has asthma based on the symptoms of coughing for several days and she is experiencing difficulty in breathing.

Environmental science focuses on the interactions between humans and the environment.

Environmental science focuses on the interactions between humans and the Environment, which is in the third option. So, the correct answer is first option .

Environmental science is an interdisciplinary field that examines the interactions between humans and the environment. It involves the study of various aspects of the environment, including the physical, biological, and social sciences. Environmental scientists investigate the complex relationships and interactions between natural systems, human activities, and the environment. Scientists, including ecologists, biologists, chemists, geologists, and other specialists, contribute to understanding and addressing environmental challenges and finding sustainable solutions. So, the correct answer is first option .

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The mRNA is used to synthesize polypeptides in a process called translation, and for that the mRNA is interpreted as a series of groups with three nucleotides each, called codons. So for each three letters, we have a codon. The codons transcribe the following amino acids: Alanine, Arginine, Asparagine, Aspartic acid, Cysteine, Glutamic acid, Glutamine, Glycine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Proline, Serine, Threonine, Tryptophan, Tyrosine, Valine, Selenocysteine.

The codons are organized in a chart, as the one that follows:

As the translation starts with an AUG codon, we sometimes have to leave some trios behind. The answer would be as follows:

1. AUG - met | GGG - gly | AUA - ile | CGC - arg | UAC - tyr | CCC - pro

The sequence would be MET-GLY-ILE-ARG-TYR-PRO

2. We will start only after the AUG codon

AUG - met | CUA - leu | AUC - ile | CCU - pro

The sequence would be MET-LEU-ILE-PRO

3. Again, we start after the AUG codon, and if the stop codon shows up the translation stops

The sequence would be only AUG - met | UAA - stop

MET

4. AUG - met | CGG - arg | UCA - ser | GCC - ala | CCG - pro | UGA - stop

The sequence would be MET-ARG-SER-ALA-PRO

Smooth muscle has a series of characteristics that identify it, Presents a single nucleus, has a different type of myosin, they are not organized in sarcomeres therefore so they are not striated, and they generate weak membrane potentials, however, can be contracted for long periods of time and the movement is not consciously controlled. Therefore we can say that the correct answer is option b.

The most probable answer is the glove, since it has space for five fingers but is not made by meat, nor by egg, and it is not alive.

Q1: As we know the limbs, especially arms are homologous structures, which means that possess a common ancestor, so we can find structures that have the same origin, even when each has suffered changes accordingly to their adaptations, the origin is the same, and the same bones are present such as radius and ulna.

Q2: As we said the evolutive origin is the same, however, the function is the same, the ancestral structure suffered changes according to their own selective pressures, for example, bats possess long phalanges that allow flight, meanwhile human has opposable thumbs that allow tool management.

In the experiment, Alice placed a sprig of Elodea in water with sodium bicarbonate as a source of carbon and then placed it under a strong light so it would photosynthesize.

Given that photosynthesis takes a carbon source, water, and light to produce glucose and oxygen, the most logical conclusion is that the bubbles are formed because the Elodea plant is releasing oxygen (option c).

An observational study means that the researchers observe the data without changing anything, while in an experimental study the researchers change something to observe the effects of what they changed.

A survey of the preferred food of the guest is not changing anything, just asking for preferences, so this is an observational study.

In the diagram, part 11 corresponds to the pulmonary alveoli, which is where the gas exchange occurs, given that they are surrounded by capillaries and the oxygen and carbon dioxide can diffuse between the capillaries and the alveoli.

So, capillaries are the part of the circulatory system that interacts with alveoli.

The types of respiration in humans are:

• Pulmonary ventilation,: the process of, taking air in and out of the lungs, (inhalation and exhalation). ,This involves the nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, and lungs, as well as the diaphragm (structures 1 to 11)

• External respiration ,is the ,gas exchange, that, occurs in the alveoli (structure 11),, where the carbon dioxide diffuses from the blood cells in the capillaries to the alveoli, and the oxygen goes from the alveoli to the capillaries.

• Internal respiration ,is the exchange of oxygen and carbon dioxide that occurs ,between the blood cells and all the other cells in the body,.

• Cellular respiration, is the set of metabolic reactions that takes place in the mitochondria of each cell to break glucose to obtain energy in the form of ATP, which requires the presence of oxygen.

The correct option is B. Mesozoic. Since Pange started to break up, around 200 million years ago. The Mesozoic spans from 252 and 66 million years ago.

urologist- urinary tract infection

nephrologist- nephrolithiasis

gynecologist- urinary incontinence, endometriosis

hepatologist- hepatitis

otorhinolaryngologist

cardiologist- carditis

pulmonologist- bronchitis

otorhinolaryngologist- otitis

Answer:

True

Explanation:

Yes the statement is true since the air flows from higher pressure to lower pressure and the rate of flow is directly proportional to pressure difference.

So increase in pressure difference will cause increase in rate of flow of air which means the winds will ne stronger.

During a chemical reaction the total mass remains the same. This means that the mass of the consumed reactants equals the mass of the created products. The number of atoms also remains the same but the molecules change.

Many meals have in their composition starch, a molecule that is formed by glucose monomers. When the human body uses glucose it transformes this carbon based molecule into water, carbon dioxide and energy.

The chemical reaction of this process is the following:

As we can see the number of each atom that conforms the reactants equal those of the products:

in total (both in the reactats and the products):

6 carbon atoms

12 hidrogen atoms

18 oxigen atoms

In this reaction glucose and carbon dioxide are both carbon based molecules

Answer:

Explanation:

The greenhouse effect is the way in which heat is trapped close to Earth's surface by greenhouse gases.

Most of the bones in the skull are held together by non-moving joints called sutures.

Answer:

Sutures are a type of fibrous joints (or fixed joints) that hold together the bones of the skull and don't allow the joined bones to move.

The biological process that is taking place in the picture in the question is called translation (b), meaning the event where the mRNA is translated into a sequence of amino acids (amino acids chain) that form a protein.

If Philippine Atmospheric Geophysical Astronomical Services Administration is not yet established, we couldn't just rely on the wind to determine the weather.

The National Meteorological and Hydrological Services (NMHS) organization of the Philippines is known as the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (abbreviated as PAGASA).

Its duties include protecting the nation from natural disasters, ensuring everyone's safety, well-being, and financial security, and advancing national progress by providing scientific and technological services in the fields of hydrology, climatology, meteorology, astronomy, and other geophysical sciences.

PAGASA, which was established by restructuring the Weather Bureau on December 8, 1972, is currently one of the Department of Science and Technology's Scientific and Technological Services Institutes.

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All of the options are correct.

The products of one process are the reactants of the other. We can conclude that cellular respiration is the direct opposite of photosynthesis.