What are the four levels of organization in living things? a. cell, multicellular, organ, organ system b. single cell, multicellular, tissue, organ c. larger size, longer life, specialized cells, organs d. cell, tissue, organ, organ system

Answer:

As the water table goes low, water may not be easily obtained leading to it scarcity. Overdrawal of water can also lead to sinking or lowering of the land surface that can make it prone to flooding. Streams and water bodies may also get disconnected due to over-withdrawal of water.

Answer:

Both studies support the concept that species operate within a narrow optimum temperature range and are coupled to enzymatic activity.

Explanation:

The studies shown in the question above started from the same concept to establish the scientific experiment and had the same objective related to the investigation as temperature changes in the environment where these organisms live influences the enzymatic activity and, therefore, the functioning of their organism, being able to including modifying the environment around them. In summary, we can say that the studies sought to support the concept that species operate within a narrow range of optimal temperature and are coupled with enzymatic activity.

Answer:

Living organisms sustain life, based on certain life processes. These life processes help to regulate their daily activities. Excretion is one among them. The metabolism takes place in the cells of living organisms resulting in both useful and toxic products. The accumulation of toxins may harm the organism. Thus, the living organisms remove all these metabolic wastes from their body and this process is called excretion. Different organisms follow different modes of excretion. Let’s have a glance at excretion in plants and how excretion in plants is different from that of animals.

Explanation:

I hope you can help buddy (:

Answer:

the excretory organ removes these westes.

this process of removal of metabolic waste from the body is known as excretion

6.022 × 10²³ units of a material make up one mole of that substance .numer of particles in 4 mole of substance can be found like this : 4×6.022 × 10²³= 24.088 × 10²³ particles.

it is called the Avogardo number or the Avogadro constant and is named after Ameo Avogadro  was was an Italian physicist best known for his contribution to the theory of molecules, which is today known as Avogadro's law and asserts that equal volumes of gases at the same temperature and pressure will have the same number of molecules. The Avogadro constant,  is the ratio of a substance's amount of substance (which has the unit mole) to the number of elementary entities (atoms, molecules, ions, or other particles) in that material. One of the seven defining constants of the SI, this constant is designated NA.

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Answer:

a) Time = Distance/speed

Time = 30km/15km per hour

Time = 2 hour

b) Time = Distance/speed

Time = 30m/6m per sec

Time = 5 sec

Answer:

Phenotypes - Eye color, hair color, pod shape and flower position.

Explanation:

Answer:

Individual bacteria can assume one of three basic shapes: spherical (coccus), rodlike (bacillus), or curved (vibrio, spirillum, or spirochete).

Explanation:

Answer:

B: warmer objects to cooler

Explanation:

Cooler objects will absorb the heat from any warmer object it comes into contact with.

Be that as it may, the four significant kinds of biomolecules incorporate starches, lipids, nucleic acids, and proteins. The greater part of different mixtures are subsidiaries of these significant essential mixtures. The correct option(D).

Each biomolecule has its attributes and is assigned to carry out some particular role fundamental forever.

Ribose is a monosaccharide pentose sugar present in RNA while deoxyribose is a determined monosaccharide sugar present in DNA.

Cysteine is an amino corrosive ordinarily known for extraordinarily influencing protein structure. It has a sulfhydryl bunch liable for the development of disulfide bonds that balance out the tertiary construction of the proteins and contributes extraordinarily to sub-atomic capabilities which you will learn later in this text.

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Q-The following question is based on the 15 molecules illustrated in the figures. which of the following molecules is a disaccharide g which molecule is a saturated fatty acid?

A.1

B.5

C.8

D.9

Answer:

L allele: 0.575 (or 57.5%)

l allele: 0.425 (or 42.5 %)

Explanation:

Homo-zygous individuals have two copies of the same allele (i.e., either L alelle or l allele), while heterozygous individuals carry both alleles at a time (i.e., one L allele and one l allele). In consequence:

- Frequency of the L allele: [(450 x 2) + 250] / 2000 = 0.575

- Frequency of the l allele: [(300 x 2) + 250] / 2000 = 0.425

Answer:

a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Explanation:

Answer:

Presence of food vacuoles; involved in digestion of engulfed food; Chloroplasts presence; Are sites for photosynthesis in plant cells; Have cellulose cell wall; rigid as to maintain the shape of the cell and offer mechanical support.

Firstly, It's Amino acids. And moving to the answer now. This contains the hydrogen atoms, the carboxylic group, and the amine group.

A basic amino group (NH2), an acidic carboxyl group (COOH), and a specific organic R group (or side chain) are the three organic molecules that make up an amino acid. Alpha-amino [alpha-amino] carboxylic acid is referred to as an amino acid informally. An amino and a carboxyl group are both joined to the core carbon (C) atom, known as the -carbon, in every molecule. A hydrogen (H) atom and the R group typically fulfill the remaining two bonds of the -carbon atom. The building components of proteins are amino acids. The great majority of chemical processes that take place in cells are catalyzed by proteins. They give cells a lot of their structural components and aid in fusing cells into tissues.

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Answer:

d

Explanation:

Answer:

any change in the nucleitide sequence because of failure in the system.

Explanation:

im in bio class lol but uh this is a definition that can be searched

Answer:

A mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.

Explanation:

Answer and Explanation:

There are many physical elements such as temperature, precipitation, humidity, altitude, vegetation, among others, that influence the presence of the insects that transmit the Chagas diseases. Its transmission seems to be enhanced by other social elements, such as the deficiency in basic services, lack of planning, the socio-economical conditions, cultural conditions. Altogether, these factors intervene in the presence of the Chagas disease, a systemic infection caused by the protozoa Trypanosoma cruzi. This protozoan is hosted by different wild and domestic mammals, transmitted to the human by hematophagous insects. The transmission occurs through dejections deposited on skin or mucose during or after the feeding process.  

Different rural areas in Central and South America are characterized by a mountain relief (temperatures between 15 and 30ºC - relative humidity between 50 and 90%), as well as by a plane relief associated with alluvial plain (temperature between 20 and 35ºC - media relative humidity of 75%). Vegetation in the mountain area provides a natural habitat to the triatomines, the insects that transmit the Chagas disease.  

Constant deforestation in mountains, soil move, the cutting down, firing, have destroyed the natural habitat of the insects, becomming the cause of their arrival to populated centers. As their environment is destroyed,    insects migrate to new areas and find refuge in precarious houses that surround the affected areas. Most of these houses have clay walls, a roof made of branches, and no floor. People that live in these conditions do not have economic resources.  Indexes of infestation in these houses are high due to the material used for their construction. Insects tend to establish near a source of food, such as domestic animals or even humans. It is also common that these houses have chicken coops and farmyards that also offer good conditions for the insects to live in.

Economic activities are important variables to consider, as these define the way of living in a population.  

Agriculture activities are performed with no control or planning. People deforest to plant, getting in contact with the insects' natural habitat, producing environmental changes, and getting in touch with them, enhancing the risks of being infected and of transportin the insects.

The cell is a complex system with specialized organelles and cellular machinery. The cell in an organisms have the same genetic material (DNA), but each cells only produce the proteins that they need in the moment or function that they are needed, that's because the cell have a "intelligent" intrecellular signaling and organization system. Some examples of these hability of the cells to control the production and liberation of proteins is the cell differentiation and the case of cells that have the function of producing protein hormones (insulin, glucagon, pituitary hormones, and hypothalamic hormones), it is important to the cells to have the control of which they produce because one cell have more autonomy and with only one genetic code an organism com be self-sufficient (molecular) and with internal protein variability.

Answer:

A. Neurons

B. Liver

C. Heart

D. Brain

Option  A. The athletes who practice blood doping would be expected to perform better at an athletic event. The practice increases the number of RBCs (red blood cells) that would carry more oxygen to muscle cells.

By increasing the number of RBCs, blood doping increases the amount of oxygen that can be transported to muscle cells, which is the critical factor for athletes' performance in aerobic activities. This increase in oxygen availability enables the athlete to perform at a higher intensity for a more extended period, ultimately resulting in better athletic performance.

The athlete would not have less energy because they have extra oxygen, and muscle cells receiving more oxygen for respiration would increase, not decrease, energy production. However, as mentioned, blood doping carries serious health risks, such as increased risk of heart attack, stroke, and blood clots, and is illegal in competitive sports.

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Answer:

The correct answer is - B. Water can have a cold temperature.

Explanation:

Qualitative measurement is a type of measurement that is not based on numerical or numbers but is completely based on the quality of the particular thing. It can be distinguished on basis of the term quality which is based on the character of the substance or condition whereas quantitive is which is based on numerics or numbers.

Among these, all the three choices have numerical measurement but the choice in which it is expressed that water can have cold temperature is qualitative measurement as cold is the quality of the water here.

Answer:

Explanation:

Step 1: Generating a Proton Motive Force

The hydrogen carriers (NADH and FADH2) are oxidised and release high energy electrons and protons

The electrons are transferred to the electron transport chain, which consists of several transmembrane carrier proteins

As electrons pass through the chain, they lose energy – which is used by the chain to pump protons (H+ ions) from the matrix

The accumulation of H+ ions within the intermembrane space creates an electrochemical gradient (or a proton motive force)

Step Two: ATP Synthesis via Chemiosmosis

The proton motive force will cause H+ ions to move down their electrochemical gradient and diffuse back into matrix

This diffusion of protons is called chemiosmosis and is facilitated by the transmembrane enzyme ATP synthase

As the H+ ions move through ATP synthase they trigger the molecular rotation of the enzyme, synthesising ATP

Step Three: Reduction of Oxygen

In order for the electron transport chain to continue functioning, the de-energised electrons must be removed

Oxygen acts as the final electron acceptor, removing the de-energised electrons to prevent the chain from becoming blocked

Oxygen also binds with free protons in the matrix to form water – removing matrix protons maintains the hydrogen gradient

In the absence of oxygen, hydrogen carriers cannot transfer energised electrons to the chain and ATP production is halted

For each of the given items, the independent and dependent variables, as well as constants are those variables that produce a change in another, the variable that depends on another to change, and that which does not change respectively.

In a scientific experiment, an independent variable is a variable that is altered or controlled to see how it affects the dependent variable. In a scientific experiment, the variable under test and being measured is known as the dependent variable.

A constant in an experiment does not vary but remains unchanged at the end of the experiment.

Considering the given items, the independent and dependent variables, as well as the constants are as follows:

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Answer:

Freezing point:

  Fahrenheit: 32°      

celsius: 0°

Explanation:

Answer:

The correct answer is - 12%

Explanation:

Given:

Mean of the population - 0.52

Narrow sense heritability or h^2 - 0.6

The expected response of selection or R = ?

Solution:

The average oil content in the selected individuals - 0.7, 0.71, 0.72, 0.73, 0.74

And, the mean of these selected individuals = (0.7 + 0.71 + 0.72 + 0.73 + 0.74) / 5

= 0.72

Formula:

S = Average of selected individuals - Average of population

= 0.72 - 0.52

= 0.20

R = h^2 x S

R = 0.6 x 0.2

= 0.12

= 12%

Thus, the correct answer is - 12%

In the periodic table, the periods represent the horizontal rows. Each period corresponds to a different principal energy level, and the elements within that period have electrons occupying specific orbitals.The correct answer is D. periods 6-7.

In periods 1-3, the elements only have electrons occupying the s and p orbitals. The d orbitals are not filled in these periods. In periods 1-4, the elements still only have electrons occupying the s and p orbitals. The d orbitals are again not filled in these periods.

In periods 3-5, the elements continue to have electrons in the s and p orbitals. However, in period 4, the d orbitals start to fill up, specifically in the transition metals. So, this option is not correct.

In periods 6-7, the elements have electrons in the s, p, d, and f orbitals. The f orbitals are filled in the lanthanide and actinide series, which are found in periods 6 and 7 respectively. Therefore, this option is correct. Thus, the correct answer is D. periods 6-7.

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Answer:

C

Explanation:

Crossing over

Answer: Crossing over

Explanation:

The diagram appears to be showing the process of crossing over. The way the non-sister chromatids are intertwining with one another shows the crossing-over process.

Answer:

livestock farming, landfills, and fossil fuel production such as coal mining and natural gas processing

Explanation:

Answer:

Catalysts, enzymes

Explanation:

Catalysts are known for reducing the activation energy of a reaction thus increasing the reaction rate.

Enzymes are a type of catalyst.