4. What type of cells are haploid?

When X fires 10 times and Y fires 10 times, the result will be a subthreshold summation.

Subthreshold summation happens when two or more presynaptic inputs that are sub-threshold (i.e., they cannot create an action potential) combine their effects on the postsynaptic neuron.

Here, the postsynaptic neuron has an RMP of -70mV and a typical threshold of -55mV. When neuron X is stimulated, it depolarizes by 0.5 mV.

When X and Y are stimulated simultaneously, the postsynaptic neuron depolarizes by 1 mV, which is sub-threshold (below -55mV).

Therefore, when X fires 10 times and Y fires 10 times, the postsynaptic neuron will experience subthreshold summation and no action potential will be fired.

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Answer: They have different characteristics

Explanation:

1. If the individual with the dominant phenotype has an affected parent with a recessive phenotype.

2. If the individual with the dominant phenotype has affected offspring with a recessive phenotype.

In a pedigree, two situations can help determine the genotype of an individual with a dominant phenotype.

1. If an individual with the dominant phenotype has offspring with a recessive phenotype, it indicates that the individual must be heterozygous (carrying one dominant and one recessive allele).

This conclusion is drawn because the recessive phenotype can only be expressed when an individual has two copies of the recessive allele.

2. Another situation is when both parents have the dominant phenotype, but they produce offspring with the recessive phenotype.

This scenario suggests that both parents are heterozygous (carrying one dominant and one recessive allele), and the recessive phenotype appears in their offspring due to the inheritance of two recessive alleles.

By analyzing these patterns in the pedigree, we can make inferences about the genotype of individuals exhibiting dominant phenotypes.

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Because they are hydrophobic, lipids are a diverse group of compounds (true)

Lipids are a class of hydrophobic compounds that include fats, oils, waxes, phospholipids, and steroids. At their core, most lipids are hydrocarbons, which are molecules with many nonpolar carbon-carbon or carbon-hydrogen bonds. Because of the abundance of nonpolar functional groups, lipids have a hydrophobic ("water-fearing") character, and most lipids have low water solubility. Lipids can perform a variety of functions in biological systems, including energy storage, insulation, barrier formation, and cellular signaling, depending on their physical properties (encoded by their chemical structure). Most new biology students may be surprised by the diversity of lipid molecules and their range of biological activities. Let's start with a fundamental understanding of this class of biomolecules.

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Answer:

Phagocytosis is the process by which cells ingest large particles, including other cells, by enclosing the particles in an extension of the cell membrane and budding off a new vesicle. During pinocytosis, cells take in molecules such as water from the extracellular fluid.

Answer:

Scientists use the geologic time scale to illustrate the order in which events on Earth have happened. ... They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened.

Life on Earth greatly change from one period to the next of geologic time.

The life on Earth change from one period of geologic time to the next because major changes appear on the surface of earth. Great changes in the environmental conditions leads to the change in the distribution of organisms as well as extinction of various organisms on which other organisms depend.

Due to this extinction of different organisms imbalance occurs within the ecosystem so we can conclude that life on Earth greatly change from one period to the next of geologic time.

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Answer:

D. Homeostasis

Explanation:

An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.

Basically, the endocrine system contributes significantly to the state of homeostasis in the body.

Homeostasis can be defined as a process through which a living organism maintains a steady or stable physical, internal and chemical environment that is ideal to enhance life and proper functionality.

Hence, regulation of the internal body temperature of the bumblebee is an example of homeostasis.

Answer:

Homeostasis

Explanation:

Complete question:

You want to study the effect of agriculture run-off on the rate of antibiotic-resistant bacteria in ponds. You gather samples from ponds surrounded by high-density livestock areas and from ponds at least ten miles from agriculture activities. You grow the bacteria on plates and test how resistant they are to antibiotics. Based on this experiment, the proximity of the pond to agriculture would be best categorized as what?

Answer:

2. the independent variable

Explanation:

During an experiment, data from an experimental group is compared with the data from a control group. Both groups are selected from the same pool or population, so they are identical in all aspects except for the independent variables.  

The election of a control group is essential in an experiment. Its principal purpose is to allow the discrimination of the results obtained by the treatment in the study, from the results that might be a consequence of other factors. The control group does not receive any treatments. It is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.  

The experimental group is the one that receives the experimental procedure or treatment. The researcher voluntarily changes the independent variables in the experimental group to observe how they affect the group under study. These variables are kept constant in the control group, not influencing the results, while the experimental group receives the treatment. There can be several experimental groups.

Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter.

Dependent variable: Refers to the variable that depends and reacts to any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. This change might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y.

The hypothesis is a conjecture. The researcher hypothesizes in order to predict what is going on or what is expected to occur. A hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.    

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The proximity of the pond to agriculture might be considered as an independent variable.

The researcher chooses ponds according to their distance from the crops. In the exposed example, the researcher chose a pond is surrounded by high-density livestock areas and another one at least ten miles away.

The magnitude of run-off might depend on how far the pond is from the crops.

Answer: Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells).

Explanation:

Cloning is the process of creating an exact genetic copy of an organism. In the case of the farmer who wanted to clone his best meat-producing bull, the process involved removing the nucleus from a muscle cell of the bull and placing it in an empty ovum.

An electric shock was given to the ovum to stimulate normal cell division, resulting in the production of an embryo. The embryo was then placed in the uterus of a surrogate cow, where it developed into the clone. The nucleus of a muscle cell was used instead of a sperm cell because the genetic material in a muscle cell is complete, containing all the necessary DNA to create a full organism. Sperm cells, on the other hand, only carry half the genetic material needed to create an organism. Therefore, using a muscle cell ensures that the clone will have the same genetic makeup as the original bull. The nucleus of the ovum was removed to make space for the nucleus of the muscle cell. This is necessary because an ovum contains its own nucleus, which would result in a mixture of genetic material if left intact. By removing the nucleus of the ovum, the nucleus of the muscle cell can be inserted and create a genetically identical clone. One benefit of cloning is the ability to replicate desirable traits in animals, such as high meat production or disease resistance. Cloning can also be used to preserve endangered species and potentially bring back extinct species. However, there are also ethical concerns and potential risks associated with cloning, including health problems in the cloned animal and a lack of genetic diversity.

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The presence of a large population of water lice in a water source indicates that organic pollution is moderate but declining. Oxygen levels are just beginning to increase (option A).

What are indicator species?

Indicator species are living organisms that tells us about the pollution status of our environment (water, air, land) by being absent or present.

Examples of indicator species are as follows;

Water louse

Lichen

According to this question, there is an abundance of large population of water lice in a water body.

This could indicate that organic pollution is moderate but declining and oxygen levels are just beginning to increase because water lice are known to thrive in water bodies with moderate pollution.

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Answer:

B

Explanation:

Allelic and genotypic frequencies of population in Hardy-Weinberg equilibrium remain the same generation after generation. p² ≅ 0.35, q² ≅ 0.17, 2pq ≅ 0.49.

The Hardy-Weinberg equilibrium is a theory that states that allelic and genotypic frequencies of population in equilibrium remain the same through generations. Being in equilibrium means the population is not evolving.

Assuming a diallelic gene, the allelic frequencies in a locus are represented as p and q.

The genotypic frequencies after one generation are

The addition of the allelic frequencies equals 1

p + q = 1.

The sum of genotypic frequencies equals 1

p² + 2pq + q² = 1

By having one single data and clearing the previous equations, we can calculate all the alleleic and genotypic frequencies.

In this case, we know the value of the recessive allele frequency,

q =  0.41

And we can use it to get the dominant allele frequency

p + q = 1

p + 0.41 = 1

p = 1 - 0.41

p = 0.59

Now that we have the allelic frequencies, we can get the genotypic frequencies.

p² = 0.59² = 0.3481 ≅ 0.35

q² = 0.41² = 0.1681 ≅ 0.17

2pq = 2 x 0.59 x 0.41 = 0.4838 ≅ 0.49

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Answer:

It should be option a

Explanation:

It should be option a

Answer

it would have to be extracted or mined, if coal is less than 61 meters then (200 feet), it can be extracted through like surface mining

Explanation:

hope this helped :)

cat B has greater potentiioal energy than cat A

Answer:

Cat B has greater potential energy then cat A.

In the science field we use the metric units because of both the given reasons i.e. A. Metric units are universally accepted. B. Metric is a universal scientific language.

The decimalized system based on the meter that had been adopted in France in the 1790s was replaced by the metric system, which is a system of measurement.

Including or covering all or a whole collectively or distributively without limit or exception.

A standardized approach that enables international scientists to communicate and compare notes is necessary. Without a standard, they would have to spend extra time converting measurements between different systems of measuring, which would reduce accuracy. SI or metric unit is favoured because, among other things, it is not based on the bodily parts of individuals who lived hundreds of years ago. A universal standard that anyone can verify serves as the foundation of this sleek and straightforward system.

Hence, 'In the science field we use the metric units because of both the given reasons i.e. A. Metric units are universally accepted. B. Metric is a universal scientific language.

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Answer:

A wolf...........

.......................

Answer:

I believe the answer is heart

Answer:

hermaphroditic as it is found in both genders

Explanation:

Answer:

i believe its A because i studied this

Explanation:

Answer:

A is the image that represents the Mid Ocean ridge

Answer:

The equation that is not necessarily true is D. ALD = BLD. This is because the line of reflection (L) does not necessarily bisect the triangle ABC, so the lengths of ALD and BLD may not be equal.

Explanation:

mark as brainliest

Answer:

v shaped gland

hope its right

Answer:

the answer is toxicologist.

Answer:

do u mean fossil? If so then Some examples of body fossils include bones, teeth, feathers, or claws. Body fossils are fossils that come from the organism itself. The dinosaur

Answer:

The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.

Explanation:

The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.

Answer:

I think the answer's A

pls like if it's correct/ helps

Answer:

B. Enzymes have particular pH's at which they function best

Explanation:

The table in this question describes the reaction rate of two enzymes (enzyme 1 and 2) measured in mmol/min. According to the question, Greg performed an experiment in which he measured the reaction rate of two different enzymes at varying pH.

At pH 7-9, the reaction rate of enzyme 1 was more than that of enzyme 2 while from pH 9.5-11, the reverse was the case. This portrays that the reactivity of an enzyme is in response to the pH they are placed in. In other words, different enzymes have particular pH's at which they function best.

Answer: D. Photosynthesis breaks down sugars to release energy, while cellular respiration stores energy as sugars.