Which muscles act involuntarily? (i)Striated muscle (ii) Smooth muscle (ii)Cardiac muscle (iv) Skeletal muscles (a) I and ii (b)ii and iii (c)iii and iv (d) I and iv

Answer:

C, E, B, D, A

Explanation:

Mitosis is the process by which a cell divides to form two cells. This involves the duplication of the genetic material. Therefore, mitosis begins with one diploid cell (diploid = 2 copies of the genome), and ends with two diploid cells (C).

Mitosis is a widespread process, occurring in all eukaryotic cells. This includes humans, animals, and single cell species (E)

Mitosis generates new daughter cells with the same genetic information as the parent cells, therefore it results in cellular reproduction, and regeneration of the individual organism through faithfully copying the genetic material (B)

Mitosis is a type of cell division. In mammals, a specialized type of cell division called meiosis is the process that is important for sexual reproduction. In some single celled organisms, mitosis can lead to a process of asexual reproduction in which the cell divides in two, producing a replica with an equal number of chromosomes (D)

Mitosis involves the passing on the genetic information, and increasing the number of cells (proliferation). Therefore, it is involved in development and growth of an organism, replacing old cells, and in asexual reproduction (some organisms can perform "budding" to reproduce using mitosis) (A)

Answer:

To emulsify is to force two immiscible liquids to combine in a suspension—substances like oil and water, which cannot dissolve in each other to form a uniform, homogenous solution.

Explanation:

An emulsion happens when small droplets of one solution (the dispersed solution, which is often oil based) are dispersed throughout another (the continuous solution, which is often water based).Emulsions are unstable by nature, so it’s normal for them to separate or break. Emulsification plays a vital role in the breakdown of triacylglycerol (TAG) fats in human digestion. When food reaches the stomach, it mixes with acidic secretions to produce chyme. Small amounts of chyme are then propelled by the pyloric sphincter into the duodenum of the small intestine to continue the digestion process.

Answer:

uv rays affect the skin, the immune system, eyes

explanation:

The ozone layer acts as a natural filter, absorbing most of the sun's burning ultraviolet (UV) rays. Stratospheric ozone depletion leads to an increase in UV-B that reach the earth's surface, where it can disrupt biological processes and damage a number of materials.

Answer:

D. cytokines differs in plant cells and animal cells ​

Explanation:

A. is false, as prokaryotes to not divide by mitosis. They divide by binary fission.

B. is false. Animal Cells do not have cell walls. Prokaryote and Plant cells have cell walls. Animal Cells have plasma membranes.

C. is also false. Eukaryotes have line-like chromosomes. Prokaryotes have a single circular chromosome.

D. IS true. Cytokinesis differs in plant cells from animal cells. This is mainly due to the cell wall in the plant cell.

The statement that cytokinesis differs in plant and animal cells is true, as plants form a cell plate and animals use a cleavage furrow. Other statements related to cell division in prokaryotes are incorrect as they divide by binary fission, not mitosis.

Among the choices provided, the true statement is d. cytokinesis differs in plant cells and animal cells. In animal cells, cytokinesis occurs through the formation of a cleavage furrow that pinches the cell into two, while in plant cells, a cell plate forms along the centerline of the cell, eventually leading to the development of a new cell wall that separates the two daughter cells.

Prokaryotic cells, such as bacteria, do not divide by mitosis because they lack a nucleus and instead divide by a process known as binary fission. The other statements provided are false since prokaryotes have a single, circular chromosome (therefore, the claim that eukaryotes have circular chromosomes is incorrect), and animal cells do not form cell walls when they divide (they only form a new cell membrane).

Answer:

The three examples for healthy behavior are as follows, eating healthy, physical exercise, getting proper sleep.

Explanation:

Healthy behavior is one related to the belief of a person and its action for his/her own well being. This is also linked with the healthy lifestyle. Eating healthy will keep us away from various diseases, well we should practice 5 meal a day habit, in future it will help us in maintaining balanced diet.  in the same way physical exercise is important so as to maintain the mental health, physical fitness is necessary remain active and healthy. Proper sleep can provide us good mental health, proper physical health and also gives us better quality of life. It is very necessary for proper functioning of the brain.  

Answer:

The conversion table was used to convert English measurements into metric ones.

Explanation:

The metric system (International System of Units) is the most common system that is recognized internationally for the measurements of mass, length, temperature, time, electric current, luminous intensity etc. This system includes the kilogram (mass), ampere (electric current),  second (time), meter (distance or length)  etc.

English System of Measurement ( imperial system) is the measurement system defined in the British Weights and Measures Act of 1824, and used across the British Empire earlier. This system includes units such as gallons, feet, miles, pounds etc.

Transfer of newly created plasmids to e coli. The bacteria that contains a plasmid with antibiotic resistance will grow in the presence of antibiotic concludes that the insertion was successful.

The plasmid DNA that contains the foreign DNA when integrated with the competent bacteria which is e coli and heated,  plasmid DNA will be entering into the bacteria by means of some smaller pores that are created in the  membranes of the cell.

The plasmid DNA will be copied many times with the help of the replicating mechanism of DNA of the bacteria. Bacteria will grow on a nutrient rich food called agar after the transformation process. Those bacteria that contains a plasmid containing antibiotic resistance only grow in the antibiotic presence. Transformed bacteria will then grow in larger quantity.

Answer:

A is the answer of this question

The best description for protein molecules in a cell is that they are long, folded chains of amino acids that can form various cell parts. They perform numerous roles within the cell due to their array of structures and shapes.

The statement that best describes some protein molecules in a cell is: proteins are long, folded chains that can form various cell parts (option a). Proteins are indeed composed of chains of amino acids which fold into complex three-dimensional shapes. These varying shapes and structures enable proteins to fulfill a wide variety of roles within the cell, from being part of the cell's structural framework to acting as enzymes catalyzing biochemical reactions. In contrast, options b, c, and d are inaccurate descriptions. Proteins are not composed of starches or glucose, nor are they synthesized in the nucleus. Instead, protein synthesis primarily occurs in the ribosomes in the cytoplasm.

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Answer:

Nucleic acids are polymers of individual nucleotide monomers. Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base. Only two 5-carbon sugars are found in nature: ribose and deoxyribose.

Explanation:

Final answer:

A structure with a five-carbon sugar, phosphate group, and nitrogenous base is called a nucleotide. It is the basic building block of nucleic acids like DNA and RNA, where it forms the sugar-phosphate backbone and contains bases for pairing.

Explanation:

The structure that has a five-carbon sugar, a phosphate group, and a nitrogenous base is known as a nucleotide, which is the monomer of nucleic acids like DNA and RNA. Each nucleotide in DNA is made up of deoxyribose, which is the five-carbon sugar, while in RNA, the sugar is ribose. The sugar is connected to a phosphate group at its 5' carbon and to a nitrogenous base at the 1' carbon.

There are four different nitrogenous bases in DNA: adenine, guanine, cytosine, and thymine. In RNA, uracil is used instead of thymine. The phosphate group of one nucleotide can link to the 3' carbon of the sugar in another nucleotide, forming the sugar-phosphate backbone of the nucleic acid strand. The nitrogenous bases pair through hydrogen bonding, which creates the structure of the double helix in DNA.

Answer:

The primary purpose of cellular respiration is to release energy from food molecules.

Explanation:

All organisms obtain the energy for their functioning, from the food they consume. Cells in the body of the organisms produce this energy by converting the energy stored in the food nutrients into a more usable form called adenosine triphosphate (ATP), which will release energy when the need arise. This process is known as cellular respiration. Some prokaryotic organisms use anaerobic respiration (oxygen not required), while others use aerobic respiration (oxygen-requiring) for energy production. In aerobic respiration, ATP is produced by the breaking down of glucose and oxygen into carbon dioxide and water. Mitochondria in the eukaryotic cells are responsible for this process, so they are called the powerhouses of the cell.

In a living organism, the food and nutrient get broken into smaller molecules that produce energy for the cell functioning by the process of cellular respiration.

The correct answer is:

Option b. To release energy from food molecules.

This can be explained as:

Therefore, cellular respiration is a process in which energy is released from the food molecules.

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Answer:

Mantle is composed of rocks where as core is composed of metals.

Explanation:

Mantle and core both are part of the earth's crust.  Though there have a difference between them- The mantle is consists of semi solidified rocks and core is consists of hot metals like iron and nickel. Core is the inner most layer surrounding the earth's center. The portion of the interior beyond the crust is called mantle. The core is the densest layer of the earth with its density ranges from 9.5-14.5 g/cm^3 where the density of mantle varies between 2.9-3.3 g/cm^3.

Answer: Competition is when two organisms fight for the same resources

Explanation:

Muscle contraction and active transport, both activities require ATP. Hence, option C is correct.

ATP stands for adenosine triphosphate. It is the energy currency of our body. It is produced in mitochondria during the process of cellular respiration and it is required by our body for many biological processes like muscle contraction and active transport.

In muscle contraction, the role of ATP is to break the myosin-actin cross-bridge and to release actin from this bridge for the next contraction. It also reduces myoplasmic calcium level during muscle relaxation.

In active transport, the cell needs energy for moving molecules against a concentration gradient (from high concentration to low concentration).

Both activities require ATP. Hence, option C is correct.

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Final answer:

ATP is essential for both muscle contractions and active transport processes in cells, highlighting its role as an energy source.

Explanation:

The question Which of the following activities is powered by ATP? refers to the roles of adenosine triphosphate (ATP) in biological processes. ATP is crucial for various cellular activities, including muscle contractions and active transport. Muscle contractions occur when ATP is hydrolyzed to ADP and phosphate, which facilitates the power stroke necessary for muscle fibers to slide past each other. On the other hand, active transport, including both primary and secondary active transport, requires ATP either directly or indirectly to move substances across cell membranes against their concentration gradient.

The correct answer is C. Both a and b are correct. This indicates that both muscle contractions and active transport processes are powered by ATP, showcasing its essential role as an energy currency in cells.

B. Nuclear Energy is the only logical answer

Answer:

Gene- DNA - Chromosome- Nucleus

Explanation:

A gene is a sequence of nucleotide bases that specifies certain products; RNA or proteins. It is the segment of DNA that holds the information to build and maintain an organisms cell and also pass genetic traits to offsprings. Hence, it is the molecular unit of heredity in living organisms.

The DNA is a long double-helical structure that stores the genetic information in our cells. It consists of two long polynucleotide chains composed of the four nucleotides subunits (A,C,G,T).

In order for the long strand of DNA to fit into the cell's nucleus, it is coiled around certain proteins called HISTONES to form Chromatin, which undergoes further coiling and organization to to linear CHROMOSOMES.

The chromosomes are structured within the nucleus, that are made up of the cell's genetic material (DNA). In eukaryotic cells, the nucleus houses the cell's DNA and directs protein synthesis (expression of the information encoded by genes).

The accurate flow chart should demonstrate the progression from gene to DNA, then to chromosome, and finally to nucleus. This reflects the hierarchical structure of genetic material within a eukaryotic cell, from the specific segments coded by genes, to the compaction of DNA into chromosomes, located within the nucleus for gene expression.

The correct flow chart that shows the relationship between the cell structures listed should reflect the hierarchical organization of genetic material within a eukaryotic cell. It begins with the most fundamental unit, the gene, which comprises a segment of DNA coding for a particular protein or function. This DNA is organized into structures called chromosomes, which are found within the nucleus of the cell. Therefore, the accurate flow reflects this progression: gene Right-arrow DNA Right-arrow chromosome Right-arrow nucleus.

This is also supported by the fact that a gene is a specific locus on the DNA sequence that codes for a particular trait, and many genes are located on a single chromosome. These chromosomes, made of DNA wrapped around histone proteins, then form the genomic content within the nucleus of the cell. The structure and organization of chromosomes ensure that DNA is compacted yet accessible for gene expression.

The relationship between these cellular structures is crucial for understanding genetics, cell biology, and the processes of gene expression and regulation.

Answer:

B. Living organisms use matter and energy for their life processes

Answer:

The answer is B. Living organisms use matter and energy for their life processes

Explanation:

Its the correct answer trust me

Answer:

B. A decline in the native species of beetle

Answer:

Option B: A decline in the native species of beetle.

Explanation:

AP Environmental Science.

Answer:

The answer is Monosaccharides

Leon should focus on consuming monosaccharides, like glucose, which are critical for immediate energy during his big football game. Carbohydrates are the primary and most efficient energy source compared to fatty acids or amino acids for such activities.

Leon should load up on monosaccharides during dinner to ensure that he has enough energy for the big football game. Monosaccharides, such as glucose, are the most common source of energy for ATP production in the body and therefore represent an immediate source of fuel for muscles during exercise. Excess glucose can also be stored as glycogen in the liver and muscle cells for later use.

Carbohydrates, proteins, and fats are key macronutrients that provide energy for athletic performance. However, for immediate energy needs, such as participating in a sports event like a football game, carbohydrates in the form of monosaccharides are the most efficient source of fuel. While fatty acids and amino acids are important for long-term energy storage and muscle repair, respectively, they are less efficient in meeting immediate energy demands compared to carbohydrates.

The phenotypic ratio for the cross of two parents with type O blood is 100% offspring with type O blood since both parents have the genotype ii. A Punnett square would show all offspring as 'ii', representing type O blood.

The question is asking to show the phenotypic ratios for a cross where both parents have type O blood using a Punnett square. Blood type O is represented by the genotype ii because type O is a recessive trait. Since both parents have type O blood, the genotype for each parent would be ii. Setting up a Punnett square:

All offspring will have the genotype ii, which corresponds to type O blood. So the phenotypic ratio for this monohybrid cross is 100% type O blood type offspring. No other blood type is possible from this cross.

Answer:

Deadly, Wet, and Dangerous

Explanation:

this can be memorized by repeating to yourself DWD

Answer: deadly,wet, and dangerous

Answer:

Grass, bacteria, and fungus.

Explanation:

All of those things are living, making them biotic factors. Water is an abotic factor, as it is not living.

Answer:

Core is the densest layer of the earth.

Explanation:

The structure of the earth's interior is made up of several concentric layers. The earth's interior is divided into three layers- The Crust, the mantle and the core.  The density of the outermost layer the crust is 3 g/cm^3. As we move towards the interior, the earth become more dense. The density of the second layer mantle ranges between 2.9-3.3 g/cm^3. The core is the innermost layer of the earth, surrounding the earth's center. the density of the core ranges between 9.5-14.5 g/cm^3.

Answer:

The percentage of people who live in poverty.

(gradpoint)

Explanation:

Answer:

POVERTY RATE

Explanation:

gradpoint

Answer:

Plant

Explanation:

Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the final stages of mitosis. In plants, the cell plate forms down the middle of the cell, splitting it into two daughter cells separated by a new wall.

Answer:

Passive Transport

Explanation:

The passive transport is an energy-independent process, which does not use ATP energy. It involves transport of non-polar, uncharged molecules and some small polar molecules through lipid bilayer.

Answer:

passive transport

Explanation:

All of the following processes require the cell to use ATP energy, except passive transport.  I hope that this is the answer that you were looking for and it has actually come to your help.

Answer: In light dependent reaction, CO2 and water enter the leaf through stomata from the environment. Water molecules splits into oxygen molecule when the light hits the pigment in the membrane of a thylakoid called chloroplast. Then the electrons move down to enzymes. Sunlight allow the enzymes to convert ADP to ATP and NADP+ is  converted into NADPH. The ATP and NADPH is used by the calvin cycle to convert carbon dioxide into simple sugar glucose.

Answer:

The innermost layer of the atmosphere is TROPOSPHERE.

Explanation:

Atmosphere - The gaseous  surroundings of earth is known as atmosphere. On the basis of variations in temperature, atmosphere has several layers as follows-

Troposphere- It is the innermost layer of the earth. extending 17 km above sea level at the  equator and about 7 km above the earth's poles.Weather phenomenon occurs in this layer.It is known as troposphere because of vigorous air current.

Stratosphere- It is the second layer above troposphere.It extends approx  50 km above the earth surface.Ozone is also found in this layer. ozone plays very important role in maintaining thermal balance.

Mesosphere- It is the third layer of earth surface.Extending approx 50 to 85 km above the earth.Here temperature remains low.And at the top of this layer i.e, mesopause has the coldest temperature.

Thermospher- Temperature in this region is slightly high because  of absorption of solar light.

Exosphere- It is the outer most layer of earth. Any particle or object in this layer if moving very fast can escape to the space. The exopause boundary of exosphere is approx 250-500 km above the surface. This is the transition layer between earth atmosphere and space

Protein channels used in facilitated diffusion are located in the cell membrane and include channel proteins and carrier proteins that help ions and molecules to cross. Hence, the correct option is C.

The protein channels that are used during facilitated diffusion are located within the cell membrane, which acts as a barrier between the interior of the cell and the external environment. These channels consist of two main types of proteins: channel proteins and carrier proteins. Channel proteins form pores in the membrane that allow specific substances to pass through based on size and charge, while carrier proteins selectively bind substances on one side of the membrane, change shape, and then release the substance on the other side.

Answer:

The Kinetic energy of the 6kg cart moving at a speed of 2 m/s at the bottom of the ramp is  12 J

Explanation:

Given:

Mass of the cart = 6 kg

Speed with which the cart is moving =  2 m/s

To Find:

The Kinetic Energy = ?

Solution:

The Kinetic  Energy of the  object is given,

[tex]K.E= \frac{1}{2} m v ^2[/tex]

where

m is the mass of the object

v is the velocity of the object

Now substituting the given values

The Kinetic energy of the 6kg cart moving at a speed of 2 m/s is

[tex]= \frac{1}{2} m v ^2[/tex]

[tex]= \frac{1}{2} (6) (2)^2[/tex]

[tex]= \frac{1}{2} (6)(4)[/tex]

[tex]= \frac{1}{2}\times (24)[/tex]

[tex]= \frac{24}{2}[/tex]

= 12 J

Answer:

Visible light, ultraviolet light and infrared light

Answer:

1. visible light, with wavelengths between 0.4 and 0.8 micrometre,

2.  ultraviolet light, with wavelengths shorter than 0.4 micrometre,

3. infrared radiation, with wavelengths longer than 0.8 micrometre.

Explanation: