organisms show slowed growth during the:


spring

summer

autumn

winter

Answer: There is no following statements. But a controlled experiment is a scientific test that is directly manipulated by a scientist, in order to test a single variable at a time. The variable being tested is the independent variable, and is adjusted to see the effects on the system being studied.

Answer:

My best guess is B!!! Sorry if im wrong!!!

Explanation:

Hope this help!! <3

Answer:

i dont speak spanish so ya but thanks for the points

Explanation:

Answer:

sphincter

Explanation:

circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning.

Option A) Lancelets are postulated to be most like the earliest chordates in appearance. They are small, fish-like creatures that lack a true vertebral column and have a notochord that runs the length of their body.

Chordates are a group of animals that possess certain anatomical features during at least one stage of their life cycle. These features include a notochord, a dorsal nerve cord, pharyngeal gill slits, and a rear tail.

The notochord is a flexible, rod-like structure that runs the length of the body and provides support. The dorsal nerve cord is a bundle of nerve fibers that runs along the back of the animal and develops into the spinal cord in vertebrates. The pharyngeal gill slits are openings in the pharynx that allow water to pass through and are used for breathing and filter-feeding in many chordates. The rear tail is a muscular structure that extends beyond the rear and is used for movement in aquatic chordates.

Chordates include a diverse group of animals, such as fish, amphibians, reptiles, birds, mammals, and some invertebrates like lancelets and tunicates. They are important to the ecology of many ecosystems and have played a significant role in the evolution on Earth.

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To determine the allele frequencies, we can use the Hardy-Weinberg equation: pp2 + 2pq + qq = 1, where p is the frequency of the dominant allele (T) and q is the frequency of the recessive allele (t).

From the given information, we know that there are 700 students who are homozygous recessive (tt) and 100 who are homozygous dominant (TT). This means that the frequency of the recessive allele (q) is:

qq = 700/1000
qq = 0.7
q = √0.7
q = 0.84

Similarly, the frequency of the dominant allele (p) can be calculated as:

pp = 100/1000
pp = 0.1
p = √0.1
p = 0.316

Therefore, the allele frequencies for tongue rolling in this population are:
- Frequency of the recessive allele (t): 0.84
- Frequency of the dominant allele (T): 0.316

Given the data provided:

1. 700 students are homozygous recessive (tt)
2. 200 students are heterozygous (Tt)
3. 100 students are homozygous dominant (TT)

We will use the Hardy-Weinberg equation to determine the allele frequencies:

pp + 2pq + qq = 1

Where p is the frequency of the dominant allele (T) and q is the frequency of the recessive allele (t).

First, we'll find the frequency of each genotype:

1. Homozygous recessive (tt): 700 / 1,000 = 0.7
2. Heterozygous (Tt): 200 / 1,000 = 0.2
3. Homozygous dominant (TT): 100 / 1,000 = 0.1

Now, we will use the equation qq = homozygous recessive frequency to find q:

qq = 0.7
q = √0.7 ≈ 0.837

To find p, we can use the equation p + q = 1:

p = 1 - q
p = 1 - 0.837 ≈ 0.163

So, the allele frequencies for tongue rolling in this population are approximately:

1. Dominant allele (T): 16.3%
2. Recessive allele (t): 83.7%

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Answer:

There are both dominant and recessive alleles for different traits. Dominant alleles often times tend to be shown as a physical trait in offspring. This is because if one parent gives a dominant and the other a recessive, the dominant will become the physical trait that is expressed. On the other hand the recessive will not be shown. For example: an offspring may have the same eye color as a parent, but also have a hair color that neither parent has. This would assume that both parents had a recessive allele that was passed to the child for hair color. Meaning the parents carried the allele for the trait but did not physically exhibit it themselves.

Answer:

cc

Explanation:

Cardiac output increases- Blood pressure rises

Parasympathetic impulses to heart - Heart rate decreases

Sensory impulses to cardiac center -SA node inhibited

Baroreceptors in aortic arch and carotid sinuses are stimulated- Blood pressure returns toward normal

What is a SA node and what does it do?

The SA (sinus) node is a collection of myocytes that are active pacemakers. It produces electrical impulses that regulate the heart's rhythm and beat rate when things are routine. The sinus node's mass is insufficient to generate a significant electrical pulse that can be seen on the electrocardiogram (ECG).

To increase heart rate, the sympathetic nervous system (SNS) produces the catecholamines epinephrine and norepinephrine. The hormone acetylcholine is released by the parasympathetic nervous system (PNS) to slow the heart rhythm.

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More than 1,700 mutations have been identified in the CFTR gene. A CF patient has two modifications of the CFTR gene. These mutations can be homozygous, the same, or heterozygous, in different ways.

Cystic fibrosis (CF) is a genetic condition that affects the lungs and digestive system.

The inherited CF gene causes the body's epithelial cells to produce a defective protein called CFTR (cystic fibrosis transmembrane conductance regulator).

Epithelial cells are the cells that make up the sweat glands in the skin. These cells also line pathways in the lungs, liver, pancreas, digestive system, and reproductive system. Because there is interference, the glands responsible for the production of fluids such as mucus and sweat are disturbed.

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Answer:

equal to the number of protons

Explanation:

I got it correct on edge

After reviewing the placemarks in the Floristic Associations folder, I would say that the best example of a woodland plant association is the "Northern Hardwood Forest" placemark.

The Northern Hardwood Forest is a type of floristic association that is characterized by a mix of deciduous trees such as sugar maple, beech, and yellow birch.

These trees form a closed canopy, creating a shaded understory that is conducive to the growth of smaller plants such as ferns, wildflowers, and shrubs.

This type of woodland plant association is found in the northeastern United States and southeastern Canada.

The Northern Hardwood Forest placemark provides detailed information about this type of floristic association, including the specific tree species, understory plants, and environmental conditions that are necessary for its formation.

It also includes photographs of the plant community, making it easier to identify and understand. In conclusion, the Northern Hardwood Forest placemark is the best example of a woodland plant association in the Floristic Associations folder.

Its detailed information and photographic documentation make it an excellent resource for anyone interested in learning more about this type of ecosystem.

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Yes, that is correct. When the hydrostatic pressure within the interstitial space increases, it can push interstitial fluid into the lymphatic capillary lumen, which is the small space inside the lymphatic vessels where lymph flows.

Hydrostatic pressure is the force exerted by fluid against the walls of blood vessels or lymphatic vessels. The lymphatic system is responsible for maintaining the balance of fluids in the body by draining excess interstitial fluid and returning it to the bloodstream. This is important because excess interstitial fluid can cause swelling and edema if it is not properly drained.

When hydrostatic pressure in the interstitial space exceeds the pressure inside the lymphatic capillaries, it pushes interstitial fluid into the lymphatic vessels. The lymphatic vessels then transport the excess fluid to the lymph nodes, where it is filtered and cleaned before being returned to the bloodstream. This helps to maintain the balance of fluids in the body and prevent swelling and edema.

Overall, an increase in hydrostatic pressure within the interstitial space pushes interstitial fluid into the lymphatic capillary lumen.

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Energy flow can also be interpreted as the separation of energy from one trophic level to the next. In the closing process, there is always a withdrawal of the amount of energy through each trophic level of eating-consuming.

The process of energy flow from plants to humans or animals can occur in the food chain or the biomass pyramid.

Plants as primary producers are located at the first trophic level. Then at the second trophic level, there are herbivorous animals that eat plants. Predators that eat herbivores are the third trophic level group, and if there are or are present even larger predators, they will represent an even higher trophic level.

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Answer:

The cell structure comprises individual components with specific functions essential to carry out life's processes. These components include- cell wall, cell membrane, cytoplasm, nucleus, and cell organelles. Read on to explore more insights on cell structure and function.

Answer:

The cell has a nucleus that controls and regulates the activities of the cell and carries genes.

The cell has a cell membrane that is made of phospholipids and allows materials to pass through.

The cell has mitochondria that create energy for the cell.

Explanation:

Answer:

Has a faster response, but the signal does not last as long.

Explanation:

The nervous system uses action potentials to transmit signals. Action potentials have a short duration and travel fast through neurons to inform in a fast way about different stimuli and allow rapid answers. On the other hand, the endocrine system uses chemical molecules to transmit their signals. As they travel through blood or together with other molecules, their signal is not transmitted as fast as in the nervous system. However, when they reach their destination and interact with the proper molecules, they start a series of changes that have a lasting effect in contrast with the nervous system.

Answer:

No

Explanation:

Trofim Lysenko was a Biologist in the then Soviet Union, who did not believe in the fundamental laws of science. Selective breeding is the method developed by humans to change certain characteristics of species to desired outcomes. This is based on the fact that living things have inheritable traits encoded in genes that can be passed from one generation to another.

Lysenko did not believe in this fact. He rather believed that when exposed to the right environment, plants and animals soon become adjusted to the exposure and can then develop traits that would be passed on to their offsprings. He applied this theory of his when he exposed wheat plants to cold believing that they would develop tolerance to cold. This failed woefully and resulted in severe starvation that caused the death of millions of people in the Soviet Union.  

Answer:

B

Explanation:

Look up an image of a human embryo v. a salamander embryo if you look carefully you'll see the arches and slits.

Attention at the neural level can be achieved by option c- inducing neural synchrony.

Neural synchrony refers to the coordinated firing of neurons in a network, where multiple neurons generate action potentials at the same time or in a specific temporal pattern. This synchronization of neural activity plays a crucial role in attention mechanisms.

When attention is directed towards a specific stimulus or task, neural networks involved in processing that stimulus or task exhibit increased synchrony. This synchronization enhances the communication and information processing within the network, allowing for more efficient and focused processing of relevant information.

By contrast, when attention is not directed towards a stimulus, neural synchrony decreases, and neurons may fire asynchronously or in a less coordinated manner. This reduced synchrony allows for a broader processing of information and less focused attention.

Therefore, option C- inducing neural synchrony is a mechanism by which attention can be achieved at the neural level, facilitating selective processing of relevant information and enhancing the efficiency of neural networks involved in attentional tasks.

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In some angiosperm plants, pollen grains express spikes on their surface that help them stick to the pollinator's body and incrceases the chances of cross-fertlization. Option B. Angiosperm.

Different families among the Angiosperm group produce pollen with spikes on their surface.

This is a strategy developed by these plants to ensure cross-fertilization. Let us remember that pollen is the masculine cell released by the masculine organ of the plant. This cell meets the ovocell and fertilize.

In cross-fertilization, pollinators play an important role since they carry pollen from one plant to another one.

To ensure pollen sticks to the pollinator's body and succesfully get to another flower, Angiosperm developed spikes that help the grain to  cling to the pollinator's body. Once the insect get to the new flower, pollen is deposited, increasing the chances of cross-fertilization.

The correct answer is b. Angiosperm

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Answer: true

Explanation:they blow west to east

Hope this helps

Answer:

False

Explanation:

comprised of the upper and lower extremities, which include the shoulder girdle and pelvis.

Answer:

Ocean currents are continuous, direct movements of the ocean. They reside on the ocean's surface and at its depths. Winds, water density, and tides all drive this movement.

Answer:

person 1 in row 3's genotype AA or Aa

Explanation:

the trait is recessive (given) which means in order to have it, you must obtain both alleles. in the pedigree, shaded shapes indicate people who have the trait, but person 1 in row 3 is not shaded so their genotype must be AA (dominant) or Aa (dominant leading) and their phenotype would not express the trait, because the dominant allele will "take over"

Genetic inferences can be made on the basis of consistently observed phenotypic differences. This statement is true. Phenotypic differences can be observed between different individuals, and these differences may be due to genetic factors.

What is a phenotype?

A phenotype refers to the observable characteristics of an individual that arise as a result of the interaction between their genotype and the environment. It is the physical appearance of an individual. These observable characteristics may be used to infer information about the individual's genotype, which refers to their genetic makeup or genetic constitution.

The phenotype is affected by several factors, including genetics, environment, and interactions between the two. As a result, consistent phenotypic differences between individuals may be due to genetic differences.

In conclusion, genetic inferences can be made on the basis of consistently observed phenotypic differences. These differences can be used to infer information about the individual's genotype.

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Answer:

C Water flowing downstream is held up in a reservoir behind a dam. Some water moves down channels through turbines connected to generators which produce electricity

Explanation:

Good explanation.

Answer: hi

Explanation:

Enamel is indeed the hardest substance in the human body. It is present in teeth of humans. It covers every tooth and provides the hard layer.

Tooth Enamel is hard glossy substance that is comprised of calcium and phosphate mineral crystals which in return makes our teeth more stronger. Teeth enamel care is extremely important to maintain the oral health of teeth.

Tooth Enamel is one of the major tissue that make up tooth in humans. It covers the top layer of the teeth known as Crown. Calcium hardens the tooth enamel. Enamel contains 96% of the minerals. The color of Enamel varies from light yellow to white.

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Answer:

Tiny cells make up everything in your body, groups of these cells will make body tissue and body tissue makes up all the organs in your body like heart and liver. These organs make up an organ system like the respiratory system which focuses on bring air in and around your body. With all these systems working together your body will work perfectly.

I hope that this is ok.