A falcultative anaerobic organism is able to perform aerobic respiration in the presence of oxygen and fermentation in the absence
of oxygen. An example of a falcultative anaerobic organism is brewer's yeast, which is used in the production of alcoholic
beverages. If sealed in a vessel containing oxygen gas, water, and sugar (glucose), the yeast will eventually deplete the oxygen
gas. As long as glucose is available, however, the yeast can still survive.
Brewer's yeast use oxygen preferentially because???

Please answer quick

Explanation:

There are three parts

1. bob

The rock which is fixed to the string .

2.point of suspension(s)

The end of the string from where the stone is tied  

3.Length of a pendulum(L)

The length between the center of gravity of the stone to the end of the string (point of suspension).

Answer:

gentic materal

Explanation:

Alleles are swapped when crossing over

Answer:

Chromosomal crossover, or crossing over, is the exchange of genetic material between two homologous chromosomes non-sister chromatids that results in recombinant chromosomes during sexual reproduction.

Explanation:

Answer: A = 154 m²

Explanation: First solve for radius r

Using circumference formula

C= 2πr

Derive to find r:

r = C / 2π

= 44 m / 2 ( 3.14 )

= 7 m²

Solve for area

A = π r²

= ( 3.14 ) ( 7 m )²

= 154 m²

Type of electromagnetic energy:  Microwave radiation

Description of use: the microwave radiation is absorbed by water molecules in the food which converts to heat intern heats the food do to the high levels of radiation being emitted into the food

Answer:

It could be temperature maybe

Explanation:

Answer:

it has thin long capillaries which allows it to carry blood to all parts of the body

Answer:

light, water, temperature, and nutrients

Explanation:

Many factors are influencing the seeding and growth, but the 4 most important are: light, water, temperature, and nutrients. These are the most known factors that are helping the plant to be strong and to grow faster.

Of course, for the plant to grow, these four elements should be regularly controlled and changed depending on the plant’s needs.

Answer:

promaryotes and eukaryotes

If a scientist sets up an experiment and the results do not support his hypothesis he should conclude that "he may want to alter some aspects of experiment and try it again".

Answer: Option B

Explanation:

Research and experimenting is all about search and re-search for achieving acceptable result in order to meet the demand of project accordingly. It demand huge patience and hard work but also smart work for saving time as much as possible.

If a scientist results do not support hypothesis than after a short break he should alter some steps or parameters of experiment and try it again. Because it may occurred due to an error. And errors are needed to be understood and then rectify it by repeating the procedures with more sincerity.

Answer:

She may want to alter some aspects of the experiment and try again

Explanation:

Answer:

Lactose is removed from the System

In order for transcription of the lac operon genes to take place, the repressor protein falls off the DNA molecule, and RNA polymerase binds to the promoter that is in the third option as the RNA polymerase initiates the lac gene expression.

The lac gene is present in the bacteria, where there are three genes that activate when there is an abundance of lactose in the bacterial medium, so that the bacteria can take the lactose and break it down into glucose and galactose for growth. Because the inhibitor, in general, inhibits the RNA polymerase's movement along the DNA, when lactose is present, the inhibitor binds to it, allowing the RNA polymerase to continue lac transcription.

Hence, in order for transcription of the lac operon genes to take place, the repressor protein falls off the DNA molecule, and RNA polymerase binds to the promoter that is in the third option as the RNA polymerase initiates the lac gene expression.

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The sickle form of the hemoglobin gene is created when an adenine nucleotide is changed to a thymine. ... That single amino acid replacement in the -globin protein alters the shape and the chemistry of the hemoglobin molecule, causing it to polymerize and distort the red blood cell into the sickle shape.

Final answer:

Sickle cell anemia is caused by a single amino acid change in the beta chain of hemoglobin, where valine replaces glutamate. This alteration leads to hemoglobin polymerization, causing red blood cells to sickle and clog vessels, thereby impeding oxygen transport and leading to serious health issues.

Explanation:

Sickle cell anemia is a condition that arises from a single amino acid substitution in the beta (B) chain of hemoglobin. Normally, the sixth amino acid in hemoglobin's beta chain is glutamate; however, in individuals with sickle cell anemia, this glutamate is replaced by valine.

As a result of this polymerization, the normally biconcave, disc-shaped red blood cells become distorted into a crescent or "sickle" shape. These malformations make the red blood cells less flexible and more likely to clog blood vessels, leading to complications such as impaired oxygen transport, breathlessness, and other serious health issues.

Answer: C. Birds Have Feathers

Explanation: k12 test / k12 unit test 5.19

Answer:

C

Explanation:

The heart moves the blood which contains the materials the cell needs and the materials from the cells

An earthworm has a heart that moves blood and the main function of this organ is to transport materials to and from body cells.

Hence, the main function of earthworms this organ is to transport materials to and from body cells.

Therefore, option C is the correct answer.

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Answer and Explanation:

Both clouds and fog are closely related to precipitation.

This can be explained first by the formation of clouds and fog, which begin when the air contains water vapor. This water vapor is produced when there is an accumulation of moisture in the enviroment which leads to the formation of clouds. A similar process occurs with the formation of fog, which comes from saturation, that occurs after the evaporation and condensation processes that take place after precipitation (water cycle).

Moreover, some types of clouds (cumulonimbus) are associated with precipitation as they could be accompanied by climatic phenomenon such as rain and snow.

The right options are:

It comes from older rocks.

It forms from sediments

It is one of the three main types of rocks.

It can form from materials solidified from solutions

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Answer:

The relative method for dating the age of rocks and fossils helps to date the rocks and fossils by determining the approximate age for the fossil or rock by comparing it to something whose age is already known like similar rocks and fossils. In fact, there are certain rocks and fossils which serve as index fossils for comparison.

Absolute dating method tends to determine a precise age of rocks and fossils by radiometric dating of the isotopes of the rocks and fossils.

A known aged rock or fossil is used in the relative dating while radio isotopes are used in absolute dating method.

Relative dating method:

It compares the rock or fossil with similar rocks which age is already known to determine the approximate age for the fossil or rock.  

Absolute dating method:

It use the radio element dating to determine a precise age of rocks and fossils .

Therefore, a known aged rock or fossil is used in the relative dating while radio isotopes are used in absolute dating method.

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Answer:spindle

Explanation:

Spindle is a strand or network that attach itself to the Chromosome and aids its movement during mitosis towards the pole ensuring every daughter cell is comprise one of it parental DNA.

Answer: Pedigree and karyotype

Explanation:

An organism's gametes have half the number of chromosomes found in the organism's body cells.

Explanation:

The gametes or germ cells are haploid (n) in nature while the somatic or other body cells are diploid (2n) in nature.

An organism's gametes have half the number of chromosomes compared to its somatic cells; gametes are haploid while somatic cells are diploid.

An organism's gametes have half the number of chromosomes found in the organism's body cells. Body cells, also known as somatic cells, contain a diploid number of chromosomes (2n), which means they have two sets of chromosomes. In humans, this is 46 chromosomes (23 pairs).

However, gametes, which are the reproductive cells like sperm and eggs, contain a haploid number of chromosomes (n), which is just one set from each pair. When gametes unite during fertilization, they restore the diploid number in the resultant embryo, thus ensuring that the offspring has a complete set of genetic information.

Answer:

1. Wind moves horizontally because of differences in air pressure. These differences in air pressure are a result of __differential______ heating of earth’s atmosphere from the _sun____.

2:This pressure moves from an area of __high___pressure to an area of__low___ pressure, creating the wind.

Explanation:

The sun rays ‘hit’ the earth's surface with increased obliquity with increasing latitude. In addition, the density of the sun rays per sq meter also decreases with increasing latitude. This is all due to the spherical nature of the earth.

However, there are also local differences that cause the earth's surface to heat differentially such as terrain and cloud cover, etc. This creates regions of warmer air mass (low-pressure zones) and cooler air mass(high-pressure zones). These differences cause winds because of air  rushes from high to low-pressure zones due to differences in air masses’ temperature-related densities.

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Natural selection is a process, whereas evolution is what can result from that process. This best describes the difference between natural selection and evolution.

Explanation:

Natural selection is the process by which the population of individuals survive which have best adapted to the environment by passing on the useful genes to its offsprings.

While Evolution is the result of natural selection where all species who have adapted to the environment and survived and passed on the genes to their offsprings. The individuals compete and survive from their genetic variations.

Answer: B

Explanation: I got 100% on the test

Answer:

cell is the simplest level of organization among them. So the correct one is R

for rates

Higher child mortality causes higher fertility rates. Rapid population growth has been a temporary phenomenon in countries around the world. Rapid population growth starts when the health of the population improves and the mortality rate in a population decreases while the birth rate stays as high as before.

for population

Population growth is still fast: Every year 140 million are born and 58 million die – the difference is the number of people that we add to the world population in a year: 82 million. ... In red you see the annual population growth rate (that is, the percentage change in population per year) of the global population.

source - ourworldindata.org

Global fertility rates are declining as societies develop and women gain access to education and employment opportunities. Global populations are increasing, but at a slower pace due to decreasing fertility rates and increased life expectancy. Population growth is unevenly distributed across the world.

Global fertility rates and populations are changing in several ways. Firstly, fertility rates around the world are declining as societies become more developed and women gain access to education and employment opportunities. Additionally, there are regional variations in fertility rates, with some countries experiencing higher rates than others. Secondly, global populations are increasing, but at a slower pace compared to previous years. This is due to decreasing fertility rates alongside increased life expectancy. Finally, population growth is unevenly distributed, with some countries experiencing rapid population growth while others are facing population decline.

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Mitosis occurs in the somatic cell, it is an equational division, mitosis is required for the repair and growth of the cell and organism consequently.

While meiosis occurs in gametes or germ cell, it is a reductional division, meiosis is responsible for the formation of sex cells as sperm and eggs in the organism.

Both mitosis and meiosis are responsible for splitting the nucleus and DNA and these are passed on to the two daughter cells formed.

Explanation:

Mitosis is the process of cell division in which the cell divides and each cell is identical to the parent cell in the context of DNA and its nature There are four phases of DNA as Prophase, metaphase, anaphase and telophase. The daughter cells formed, have diploid (2n) number of chromosomes.

While meiosis is the process of cell division in germ cells which start with one cell and ends in 4 haploid cells. Meiosis is completed in two steps as meiosis 1 and meiosis 2.

Mitosis results in two identical diploid son cells without homologous chromosome pairing, while meiosis results in four unique haploid son cells with homologous pairing and  inheritable recombination. Both  suffer DNA replication.

Comparison of Mitosis and Meiosis  Both mitosis and meiosis are critical processes of cell division in eukaryotic cells, but they serve different purposes and  parade several unique characteristics.   Unique Aspects of Mitosis  Results in two son cells  Son cells are genetically identical to the parent cell  Doesn't involve pairing of homologous chromosomes  Unique Aspects of Meiosis  Results in four son cells  Son cells have half the number of chromosomes of the parent cell( haploid)  Crossing- over occurs, leading to  inheritable recombination  Common Aspect  Both processes are anteceded by a round of DNA replication.  Meiosis differs from mitosis in several ways, but the abecedarian  congruity is that both are anteceded by DNA replication. In mitosis, the performing son cells, which are  generally diploid, are genetically identical. In  discrepancy, meiosis is characterized by two nuclear divisions and produces four genetically unique haploid son cells, important for sexual  reduplication.

Answer:

The correct answer is option d) 50%.

Explanation:

When a man has an allele combination Ww for a trait, the percentage of his gametes that will have a dominant allele is 50%.

Therefore, when a man has an allele combination Ww for a trait, the percentage of his gametes that will have a dominant allele is 50%.

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Answer:

a) A person living in the wilderness can obtain food by feeding on the different plants and trees in the area. Once, he gets a knowledge of the plants which are edible, he can start to even grow them if he plans to stay for a long time.

b) Many people living in a community can obtain food from many different resources. The can plant fruits and vegetables. They can hunt for wild life animals and cook them.

c) A person living in a community will be able to get more ideas for obtaining food resources. The work of finding the food resources will be divided among different persons of the community instead of just a single one. Hence, in this way obtaining food resources will become easier.

Final answer:

An individual in the wilderness might hunt, fish, or forage for food, while a community can use agriculture, trade, and specialization to obtain resources. Communities help increase survival rates by sharing knowledge and labor in food production.

Explanation:

a. Humans require clean air, freshwater, food, and shelter to survive. When considering how an individual living alone in the wilderness could obtain food, they might rely on skills such as hunting, fishing, and foraging for wild edibles. Without the aid of others, they would need a comprehensive understanding of their environment and the resources it offers.

b. In contrast, when many people living in a community work together to obtain food, they can employ forms of agriculture, trade, and specialization to secure a diverse range of food resources. Communities can develop systems like farming crops, raising livestock, and creating food distribution networks, which contribute to a more reliable food supply for all members.

c. Living in a community can increase the survival rate of individuals when it comes to obtaining food resources by providing a collective safety net. Collaboration allows for the sharing of knowledge and labor, thereby creating a more efficient system of resource acquisition and distribution.

Answer:

Genetic drift

Explanation:

Genetic drift is the change in the frequency in which an allele occurs in a population due to random sampling meaning the alleles in the offspring in a population are a random sample of those in the parents.Genetic drift being an evolutionary process leads to changes in the gene pool of a population over time.

Answer:

50%

Explanation:

If both parents have AB blood type, the expected outcomes for their offspring would be 25% AA (type A), 50% AB (type AG), and 25% BB (type B)

Answer:

25%

Explanation:

1/4 offspring could have blood type B: a 25% chance. 2/4 could be AB and 1/4 could be A

Answer:

The correct option is A) The molecule to which a drug binds

Explanation:

A drug target can be described as any molecule which is present in an organism's body to which a certain drug can attach and cause therapeutic effect. Usually, the drug target is a certain type of proteins such as receptor proteins, enzymes etc. The drug can work in different ways on the drug target such as inhibiting the protein, changing its active site or changing its substrate etc. Hence, the correct option is A.

Answer:A the molecule to which the drug binds.

Explanation: