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Answer: in the process of polyspermy development

Explanation:  in most cases the egg cell blocks polyspermy

Biologists study cells due to the cell relation to that of animal cell

Yeast are eukaryotic organisms which are part of the fungus kingdom.

They are important to biologist because they tend too carry out all the functions of the eukaryotic cells and they are known to be closely related to animals

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Answer:

C . Cell wall and Chloropylast is correct answer

Explanation:

Because plants don't move so they have cell walls and chloroplasts but human cell moves so they don't need cell wall

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➥ Plants are autotrophic organisms which manufacture their own food. Plant cells have chlorophyll containing chloroplasts which are involved in the process of photosynthesis. A plant cell is surrounded by cellulosic cell wall which is dead at maturity. Chloroplasts and cellulosic cell wall are characteristics of plant cells only.

The thermoregulation strategy helped the hummingbird decrease its body

temperature is resting in the shade. Thus, option "D" is correct.

Thermoregulation itself is actually a branch of homeostasis. Homeostasis is defined as the internal regulation of body environment which includes the vital organs of the body such as the heart, liver, brain and contraction of skeletal muscles.

Thus, option "D" is correct.

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Answer:

Explanation:

left main bronchus

Answer:

it's not easy to destroy plastics if we use nonrenewable plastics u will have to throw them and they will become poison to the insets

Axial skeleton is composed of 80 bones in the body system.

These are bones which are found in the central core of the body and examples include skull, vertebrae etc.

The axial skeleton comprises of 80 bones which perform various types of functions in the body.

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Women tend to reach higher bac levels more quickly than men because they have lower levels of the enzyme alcohol dehydrogenase.

BAC levels refers to the blood alcohol levels.

Women tend to reach higher BAC levels than men.

The enzyme alcohol dehydrogenase is responsible for the metabolism of alcohol.

Women generally have lower levels of the enzyme in their body and thus metabolize alcohol more slowly.

Thus, women reach higher BAC levels than men.

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Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in the amount of genetic variation in a population.

Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. Because of this variety, some people have characteristics that suit their surroundings more than others.

Four requirements must be met for natural selection to take place: reproduction, inheritance, variety in physical traits, and variation in the number of children produced by each person.

Reproduction:

A population must procreate to produce a new generation in order for natural selection to affect it. Over many generations, people who have the characteristics that are most compatible with their environment tend to breed more than people who don't.

Heredity:

Since the genes of the parents combine to form the DNA of their offspring, heredity and reproduction go hand in hand. Natural selection must operate if parents with favourable qualities pass those traits on to their kids.

Variation in Characteristics:

Only when individuals within a community differ in their personal features can natural selection take place. For instance, different people must have varied colors in order to research natural selection on color within a population. There wouldn't be any traits for nature to "select" over others in the absence of variety in traits.

Fitness Variation:

Compared to its popular notion, fitness has a more technical meaning. Fitness in the context of evolution refers to an organism's capacity for maximum survival and reproduction. Natural selection cannot take place in a population unless its individuals have varying levels of fitness. Some people must have characteristics that make it easier for them to survive and procreate more frequently than others. Otherwise, natural selection cannot act to increase the number of people with advantageous features and decrease the number of people with undesirable qualities.

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the chandra telescope can be used to see blackholes

Chandra telescope would be used to find a black hole. Therefore, option (A) is correct.

The Chandra X-ray Observatory is a space telescope that was developed with the express purpose of detecting and researching X-ray emissions coming from various astronomical bodies. Observing the powerful X-ray radiation released from the neighbourhood of black holes, particularly their accretion discs and jets, has been an essential part of the process that led to the discovery of black holes and the investigation of their properties.

Because of the important new information it has uncovered about the characteristics and actions of black holes, Chandra has become an essential instrument in this field of study.

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Factors that affect genetic diversity are:

The diversity of alleles of individuals of the same species is what we call genetic variability.

for example, are characteristics present in human beings that make us quickly understand that we have phenotypic variations in relation to others.

With this information, we can conclude that Factors that affect genetic diversity are: sewage from cities dumped in vers - pollution, sections of large forests cut by resources - habitat fragmentation, Burmese pythons infesting the Everglades - invasive species, rhinos indiscriminately killed by their horns - exploration

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The probability that their next child will have polydactyly is 0.75

Polydactyly may be characterized as a circumstance in which an individual has more fingers or toes as compared to normal.

In humans, it occurs due to the homozygous mutants for a HOXD13, and due to which digits are joined and a condition known as Polysyndactyly occurs.

If both parents carry the genotype heterozygous for Polydactyly, i.e. Pp, the resultant offspring will have the genotypes PP, Pp, Pp, and pp. In which pp is normal, while all the three are affected due to the expression of dominant allele causing Polydactyly.

Now, according to the question, only one of the offspring possess the genotype of pp, hence the probability of their next child will have polydactyly is [tex]\frac{3}{4}[/tex] = 0.75.

Therefore, the probability that their next child will have polydactyly is 0.75.

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The phenotypic ratio of their offspring would be 1/4 each for black eyes/green skin, black eyes/white skin, orange eyes/green skin, and orange eyes/white skin respectively.

The male would be heterozygous since he has a parent that is homzygous recessive.

Assuming that eye color is A/a and skin color is B/b.

The genotype of the male would be: AaBb

The genotype of the female would be: aabb

                   AaBb    x    aabb

Progeny

A_B_ = Black eyes, green skin = 1/4

aaB_ = orange eyes, green skin = 1/4

A_abb = black eyes, white skin = 1/4

aabb = 1orange eyes, white skin = /4

See the attached image for the Punnet's square analysis.

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Answer:

The most common food item that is spoilt by bacteria is dairy products,canned food,fish meat etc.

The sympathetic and parasympathetic are responsible for the body's spontaneous actions, such as breathing, heartbeat, digestion, body temperature control.

The sympathetic nervous system acts in an opposite way to the parasympathetic one, preparing the organism to react in situations of fear, stress and excitement, adapting the functioning of several internal systems to a high state of readiness.

In this case, the Sympathetic nervous system also controls body functions that are rarely conscious and parasympathetic nervous system the part of the autonomic nervous system responsible for stimulating actions that allow the body to respond to calm.

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Answer:

C

Explanation:

ATP has to do with energy so the correct answer would be energy storage.

The one that describes ATP is energy storage. The correct option is C.

A chemical that is a part of all living cells and gives energy to a variety of metabolic processes, including the production of RNA.

In patients with advanced solid tumors, the effects of laboratory-produced ATP on weight loss and muscle strength are being investigated. Likewise known as adenosine triphosphate.

The principal energy source for critical biological processes such muscular contraction, nerve impulse transmission, and protein synthesis is ATP generated in mitochondria.

For example, large levels of ATP signal that the cell has enough ATP and does not need to produce any more through cellular respiration. In this instance, a product "feeds back" to block its pathway, which is a form of feedback inhibition.

Thus, the correct option is C.

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The carbon cycle moves through virtually all of the earth's spheres.

There are 4 majors spheres of the earth:

The carbon cycle moves through the air (atmosphere), oceans (hydrosphere), organisms (biosphere), and the soil (geosphere).

Thus, the carbon cycle moves through all the spheres of the earth.

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Answer: D. all of the Earth's spheres

Explanation:

The volume and pressure inside the left ventricle at the end of diastole is referred to as end-diastolic volume and end-diastolic pressure respectively.

A diastole is the part of the heartbeat cycle when the heart muscle relaxes and allows the heart chambers to fill with blood.

The volume inside the left ventricle at the end of diastole is referred to as end-diastolic volume.

The pressure inside the left ventricle at the end of diastole is referred to as end-diastolic pressure.

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Humans and chimpanzees are both mammals but they have characteristics that different or set them apart from each other. These characteristics include;

- Chimpanzees work on all four legs while humans walk on only two legs
- Chimpanzees avoid river/oceans because they do not know how to swim while humans can learn how to swim with constant practices
- The body of a chimpanzee is covered with thick hairs while humans do not have as much hair on the body
- Humans have an S shaped spine while chimpanzees have a C shaped spine

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Answer:

So, the correct answer is 'Cells wall is rigid and does not get overstretched'

The ability to limit water transport and to conserve it is the feature most likely to be chosen in the  plants growing in the desert.

Since the plants in desert regions are tiny, have deep roots, and have a thick,  which also helps to keep the plants cool and slows evaporation, they lose less water and are more effective in hot temperatures like deserts. Animals cannot consume the majority of desert plants because they have. As a result of cactus and aloe vera flourishing in this area of the desert, The flora is frequently seen in deserts.

So  The ability to limit water transport and to conserve it is the feature most likely to be chosen in the  plants growing in the desert

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An effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] is a shift to the left by the curve.

An enzyme refers to a biological catalyst that speeds up the rate of a chemical reaction, especially by lowering the activation energy of its chemical reactants.

In Science, a heterotropic activator is a regulatory molecule which serves as an activator of the enzyme. Thus, an effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] would be a shift to the left by the curve.

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The action that is likely to cause air to enter the victim’s stomach (gastric inflation) during bag-mask ventilation is ventilating the patient when is chest is not rising.

Gastric inflation is the process in which air is been blown into the stomach of the patient which can be as a result of inflation of the lungs during lung or bag mask ventilation.

Therefore, The action that is likely to cause air to enter the victim’s stomach (gastric inflation) during bag-mask ventilation is ventilating the patient when is chest is not rising.

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a. reduces immunity to diseases

The effect increasing UVR has on animals is reducing immunity to diseases.

A body could be heated to an incandescent temperature to generate UV radiation, which seems to be the case with solar UV, or an electric current would be sent through a gas, typically vaporized mercury, to generate UV radiation.

A disease would be a specific aberrant state that adversely affects an organism's structure as well as function on the whole or in part, and which could be not immediately brought on by any external trauma.

Therefore, the correct answer will be an option (a)

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Answer:Why are diseases caused by viruses often difficult to treat?

Explanation

Viruses are much harder to treat since they are within the human host cells. Most antiviral medications slow down the virus but do not kill it. Antivirals keep the infection under control, or stop the virus from multiplying, while your immune system does the heavy lifting.

Answer:

Antimicrobial resistance  all of a sudden happens when germs and fungi develop and then it gives the ability to kill the drugs designed to kill them  hundred times smaller then human cells

Explanation:hope that helps have a great day and stay safe (;..... p:s this is ashely/cee cee

The type of cells that are spherical and contain energy molecules are fat cells

A fat cell is a connective cell in the body that is spherical in shape that is use to store and produce energy, fatty acids and help to store fat. Fat cells are a form of connective tissues in the body that generate ATP and also store fat in adipose tissue.

Therefore, The type of cells that are spherical and contain energy molecules are fat cells

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Answer:

The laws of conservation of mass applies to ecology because the transfer of nutrients from organisms to the ground results in excess energy not disappearing

Answer: The law of conservation of mass states that the total amount of mass remains constant in a system. In ecology, this means that when an organism is eaten, its mass is conserved. Some of the organism’s mass is used to make new proteins, and some of it is passed as waste in the form of urine or feces. The rest is converted directly into energy. This energy helps the consumer to move and grow, and it helps it to build and repair new tissue.

Explanation: The written response for you guys

Answer:

digestion, circulation, and respiration.

Explanation: