Ap biology evolution why do some organisms evolve away organs

Answer:

false

Explanation:

Answer:

In recent years PGD technology has been increasingly used by infertile patients undergoing IVF treatment, in order to screen their embryos for chromosomal abnormalities. Aneuploidy is extremely common in human embryos and leads to a developmental arrest, implantation failure and spontaneous abortion.

Answer:

A

Explanation:

It remains constant because carbon cycles through the atmosphere, hydrosphere, biosphere, and geosphere.

Answer:

A. and D.

The nervous system removes cervical and metabolic waste from the brain, helping prevent brain problems. Your digestive system cleans the body by removing toxins, and your liver works to clean. The excretory system cleans your blood, allowing for healthy blood that is free of waste.

If you cannot pick more than one option, I would go with D.

Answer:

heat loss, energy for cellular process: transpiration, other forms of water, oxygen, carbon dioxide loss

Explanation:

The energy received by the Oak leaves which did not contribute to the synthesis of biomass may be used for or produced as heat loss, energy for cellular processes such as transpiration, other forms of water, oxygen, or carbon dioxide loss.

The material from previously living organisms known as biomass is utilised to produce bioenergy. Examples include wood, wood byproducts, energy crops, agricultural waste, and organic waste from commercial and residential sources. The main biomass energy source nowadays is wood and wood waste.

Renewable organic material from plants and animals is known as biomass. Up until the middle of the 1800s, biomass accounted for the majority of the entire yearly U.S. energy consumption. Biomass is a popular fuel in many nations, particularly for heating and cooking in underdeveloped nations.

Thus, the energy received by the Oak leaves which did not contribute to the synthesis of biomass may be used for or produced as heat loss, energy for cellular processes such as transpiration, other forms of water, oxygen, or carbon dioxide loss.

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Answer:

The node

Explanation:

Each branch point on the cladogram represents where species split off into new ones. The node represents the last point at which 2 new species shared a common ancestor.

Answer:

Molecular Structure and Polarity. The distinctions between the chlorophylls, which are more polar than β-carotene are slight: chlorophyll a has a methyl group (Y=CH3) in a position where chlorophyll b has an aldehyde (Y=CHO). This makes chlorophyll B slightly more polar than chlorophyll A.

The stretch receptors and neurons of the autonomic nervous system are parts of the gastrointestinal reflex pathway.

This is usually stimulated by senses as a result of the presence of stretch receptors and neurons of the autonomic nervous system.

They help in controlling  the release of acids in the stomach and also suppresses the release of digestive proteins.

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Answer:

The bird has a narrow beak that is longer than the length of its head.

Explanation:

-The beak is long and thin, which helps it dip into the flowers to sip nectar (a sugary fluid the hummingbird uses for food).

-This bird (Hummingbird) have a long, narrow beak that allows it to reach the nectar from brightly colored, tubular flowers. It also feeds on insects and have a flexible lower beak that allows them to grab insects from the air during flight.

hope that helps :)

Answer:

The bird has a narrow beak that is longer than the length of its head

Explanation:

-The beak is long and thin, which helps it dip into the flowers to sip nectar (a sugary fluid the hummingbird uses for food).

-This bird (Hummingbird) have a long, narrow beak that allows it to reach the nectar from brightly colored, tubular flowers. It also feeds on insects and have a flexible lower beak that allows them to grab insects from the air during flight.

hope that helps :)

Answer:

Wht are the answer choices

Explanation:

In the Hardy-Weinberg principle, the values of p and q will not change if evolution is not occurring.

The Hardy-Weinberg principle is a model used in population genetics to estimate genotypic and allele frequencies in a population.

The Hardy-Weinberg principle states that allele and genotypic frequencies remain constant in absence of evolutionary forces.

These evolutionary forces include nonrandom mating, gene drift, gene flow, mutation and natural selection.

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Answer:

we should listen to our elders

Explanation:

resources is important

Q.

Which is NOT an example of a particular phenotype being the reason a species has survived in their environment?

A-A black wolf in a pack of grey wolves in the forest

Approximately 10% of the available energy is passed from organisms at one trophic level to organisms at the next trophic level. This is known as the 10% rule or the 10% energy transfer efficiency.

Energy flows through trophic levels in an ecosystem starting with producers (plants or algae) that convert sunlight into chemical energy through photosynthesis. When herbivores consume these producers, only a fraction of the energy stored in the plants is assimilated into their bodies, while the rest is lost as waste or used for metabolic processes like respiration. This assimilated energy becomes available to the next trophic level.

As energy moves up the food chain, similar inefficiencies occur at each level. Carnivores that consume herbivores receive only about 10% of the energy stored in their prey. This pattern continues as energy is transferred to higher-level predators.

The low energy transfer efficiency can be attributed to several factors. First, organisms expend energy for basic metabolic processes, such as respiration, movement, and growth, which reduces the energy available for transfer. Second, energy is lost as heat during these metabolic processes. Additionally, not all parts of an organism are consumed or digested by predators, resulting in energy losses through waste.

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Answer:

4

Explanation:

There are 4 nitrogenous bases and they are Adenine, Thymine, Cytosine and Guanine (in RNA, Thymine is replaced by Uracil)

Answer:

Four different types of nitrogenous bases are found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).

Explanation:

DNA is a polynucleotide. Each nucleotide is made up of deoxyribose sugar, a phosphate group and nitrogenous base. In DNA, there are four main kinds of nitrogenous bases. Adenine (A), guanine (G), thymine (T), and cytosine (C) are the four bases of DNA (C). Purine bases are adenine and guanine, whereas pyrimidine bases are thymine and cytosine. Base pairing occurs between complementary bases on two strands of double-stranded DNA. By two and three hydrogen bonds, A and G link with T and C, respectively. In RNA, uracil is present instead of thymine.

The percentage of moths in the natural population that was white in 1962 is : 4%

Hardy-weinberg equilibrium states that the sum total of all the genes of an individual in a population is constant when the disturbing factors such as genetic drift does not occur

p² + q² + 2pq = 1

Applying the equation below

p² + q² + 2pq = 1

p = frequency of dominant allele

q = frequency of recessive allele

q² = frequency of h0m0zygous recessive genotype

p² = frequency of h0m0zygous dominant genotype

From the graph

Frequency of G allele ( i.e p ) = 0.8

percentage of white moths = q²

Note : p + q = 1  ---- ( 1 )

Insert value into equation ( 1 )

0.8 + q = 1

therefore ; q = 0.2

Hence the percentage of white moths = ( 0.2 )² = 0.04

                                                                               = 4%

Hence we can conclude that The percentage of moths in the natural population that was white in 1962 is : 4%

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Answer: Nucleus membrane isn't part of the ER or Golgi Apparatus, BUT all of them are part of the endomembrane system.

Endoplasmic reticulum and Golgi apparatus are two membrane-bound organelles found in eukaryotes. Both these organelles are closely associated and functionally related. Both endoplasmic reticulum (ER) and Golgi apparatus are two components of the endomembrane system of a cell. Lysosomes and vesicals are the other components of the endomembrane system.

Answer:

40

Explanation:

40 chromosomes would be found in the sperm produced by heat same squirrel

40 chromosomes would be found in the sperm produced by heat same squirrel.

A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. The very long, thin DNA fibres in most chromosomes are covered with packing proteins; in eukaryotic cells, the histones are the most significant of these proteins.

The highest possible level of DNA and protein organisation is seen in chromosomes. Chromosomes' primary job is to carry DNA and pass genetic material from one generation to the next. Cell division involves the critical function of chromosomes. They guard against tangles and damage to the DNA.

For above given example, if 20 chromosomes are present in skin cells, then the squirrel will have 40 chromosomes in the sperm cells.

Thus, 40 chromosomes would be found in the sperm produced by heat same squirrel.

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Cavendish banana crop be destroyed some day due to Panama disease.

The Cavendish banana is considered as the most popular banana worldwide but it could disappear in the coming years because of the attack of an aggressive fungus called "Panama Disease."

This disease destroy the banana plant at faster rate which leads to its destruction so we can conclude that Cavendish banana crop be destroyed some day due to Panama disease.

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Answer:

woodlands and lush vegetation

Explanation

Deciduous woodlands contain trees with broad leaves such as oak, beech and elm. They occur in places with high rainfall, warm summers and cooler winters and lose their leaves in winter.

Answer:

high rainfall, warm summers and cooler winters

the landscape contains  oak, beech, elm, Lichen, moss, ferns, wildflowers and other small plants

The temperature in a temperate woodland & shrubland biome is hot & dry in the summer with temperatures up to 100 degrees F. The winter is cool & moist with the low temperature about 30 degrees F. Precipitation: Annual rainfall is 10-17 in.  

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Answer:

Generally, if a cell does not recognize something, it will launch an immune response.

Explanation:

This is why individuals who have organ transplants must be put on immunosuppressants, when cells do not recognize a foreign body they will immediately assume it is harmful and make an attempt to attack it.

Influenced by rotation of Earth

caused by prevailing winds

found near the top of the ocean

The phrases that describe deep Ocean currents are :

caused by differences in water

found closer to the ocean floor

caused by differences in water density

Surface ocean currents are found near the top of the ocean, and they are caused by prevailing winds. The wind creates a force on the surface of the ocean, which causes water to move in the direction of the wind.

These currents are responsible for redistributing heat around the planet, making them an important factor in regulating climate.

Deep ocean currents, on the other hand, are caused by differences in water density and temperature. Cold, dense water sinks to the bottom of the ocean, creating a current that can move across the ocean floor.

This process is known as thermohaline circulation, and it helps to redistribute nutrients and oxygen throughout the ocean, making it an important factor in marine ecosystems.

The rotation of the earth also influences ocean currents. Due to the Coriolis effect, surface currents in the Northern Hemisphere tend to flow clockwise, while currents in the Southern Hemisphere tend to flow counterclockwise. This effect is caused by the rotation of the earth and the resulting centrifugal force.

Finally, currents that are found closer to the ocean floor are deep ocean currents. These currents are slower and less visible than surface currents but can have a significant impact on the ocean's circulation and the Earth's climate.

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The economic situation best describe by Chile’s worsening economy led to the government being overthrown by a military junta.

The economic condition of Chile changed over time.

Due to a worldwide recession, the GDP of Chile dropped to 14.1 in 1980.

The value of the currency is overvalued.

Due to the Asian crisis, in 1997 economic growth depletion started.

Thus, the correct option is C.

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Answer:

C.

Chile’s worsening economy led to the government being overthrown by a military junta.

Explanation:

yes

Answer:

Thus during metaphase of mitosis, each chromosome (i.e., each chromatid pair) will contain two molecules

Explanation:

double stranded DNA (one molecule per sister chromatid). The following diagram depicts the behavior of one homologous pair of chromosomes during mitosis.

Six DNA molecules are there in three pairs of homologous chromosomes. This is because each homologous chromosome will contain two molecules of double-stranded DNA.  

Homologous chromosomes may be defined as two chromosomes of the same length, position, and structure one inherited from the father's side and the other from the mother's side.

The amount of genetic material may vary from phase to phase of the cell cycle. But at the time of metaphase during mitosis, each chromosome will possess two molecules of DNA.

Therefore, Six DNA molecules are there in three pairs of homologous chromosomes.

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Answer:

sensory, motor, and interneurons.

Explanation:

For neurons in the brain, at least, this isn't an easy question to answer. For the spinal cord though, we can say that there are three types of neuronssensory, motor, and interneurons.

Answer:

Afferent "Sensory" Neuron

Interneuron "Associative Neuron"

Efferent "Motor" Neuron

Explanation:

The Afferent Neuron or Sensory Neuron receives information from the sensory receptors and carries the impulse from the sense receptors to the central nervous system. In this example the touch receptors in the skin are relaying information through the Afferent "Sensory" Neuron from the environment to the spinal cord.

The Interneuron or the Associative neuron is the transfer station or the decision making neuron. In the case of the reflex arc the Interneuron would make a decision to respond or not respond based upon the intensity of the stimulus.

The Efferent Neuron of Motor Neuron would then return the impulse back to the muscle or gland that would need to respond.

Answer:

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others

Explanation:

Answer:

Answered below

Explanation:

the plasma membrane of a skeletal muscle fiber is called the sarcolemma. The sarcolemma invaginates into the cytoplasm of the muscle cell (sarcoplasm). This forms membranous tubules that pass across the muscle cells.