Answer:
the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
what is the function of phloem?
Take 50 Points
Answer:
[tex]\huge\boxed{Answer\hookleftarrow}[/tex]
⎆ Phloem is the structural part of the plant that helps in the transportation of food materials from the green parts of the plants (leaves ⇻ where the food is made) to different parts of the plants.
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A population of 1,000 healthy, at risk people is monitored for one year starting on January 1st, and the development of cases of chicken pox is noted. No one has chicken pox at the start of the investigation. Twenty people develop chicken pox on June 30th and forty people develop chicken pox on September 30th. Twenty-four people were lost to follow-up on March 31st, and twenty-four people were lost to follow-up on November 30th. None of those lost to follow-up had developed chicken pox prior to becoming lost. Assume that you can get chicken pox only once.
Required:
What is the cumulative incidence of chicken pox in this population during the one-year period from January 1st through December 31st?
Answer:
[tex]\mathbf{cummulative \ incidence = \dfrac{60}{1000}}[/tex]
Explanation:
We recognize that total occurrence equals new cases of disease over time divided by the number of people at risk at the onset.
Mathematically:
[tex]\mathbf{cummulative \ incidence = \dfrac{New \ cases \ of \ disease \ occurrence}{Number \ of \ population \ at \ risk \ at \ onset}}[/tex]
Given that:
Number of the population at risk = 1000 individuals
New cases during Jan 1 - Dec 31 = 60 because;
At 20 occurred on June 30 & 40 on Sept. 30) & no new cases were identified after that:
∴
[tex]\mathbf{cummulative \ incidence = \dfrac{60}{1000}}[/tex]
Serotonin (5-hydroxytryptamine, 5-HT) is a neurotransmitter with receptors (5-HT receptors) located in cells throughout the body.
a. True
b. False
Answer:
a. True
Explanation:
Serotonin receptors are G protein-coupled receptors involved in the modulation of both excitatory and inhibitory neurotransmission. Serotonin receptors are divided into seven classes (5-HT1 to 5-HT7) which can be in turn divided into several subclasses (A, B, C, etc.). Most of the serotonin receptors are located in the gut (about 90%), but they are also spread in other parts of the body, including the amygdala, the bed nucleus of the stria terminalis (BNST, also known as the extended amygdala), Merkel cells (skin), taste receptor cells (tongue), Raphe nuclei (brainstem), etc.
What do you already know about the rotation and the revolution of the Earth?
Explain your Answer
Answer:
I already know that the earth rotates on its axis because of magnetic forces. I also know that the earth revolves around the sun because of the pull of the sun's gravity.
What is different about the gases you inhale and exhale? Be specific.
Answer:
you inhale oxygen and exhale carbon dioxide.
hope this helps and please mark brainliest :)
Please answer I will give u brainliest
Answer:
stationary front
Explanation:
the correct answer is stationary front
Please help I’ll mark you as brainliest if correct
the answer for this question is B/3
What is this tiny bird doing in this big guy's mouth? The plover bird is
picking the chunks of meat out of the crocodile's teeth. This helps the
crocodile's mouth stay healthy and be ready for its next big meal. What is
type of relationship is being described?
The cell theory states that all cells arise from existing cells. Which scientist first
determined this part of the cell theory?
A. Hooke
B. Schleiden
C. Schwann
D. Virchow
Answer: C. Theodore Schwann
Explanation: The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life.
CAN FISH SURVIVE ONLY IN WATER WITH DISSOLVED OXYGEN?
Answer:
Oxygen dissolves into water from two sources: the atmosphere and from plants in the water. kills fish from oxygen depletions can range from “partial” to “total”. In a partial kill the dissolved oxygen level gets low enough to suffocate sensitive species and large fish, but many small fish and hardy species survive.
Explanation:
I hope this helped you
Please help me name each letter and match it to the definition.
Answer:
1. B. Medulla oblongata contains cardiac, respiratory, vasomotor and reflex centers.
2. A. Hypothalamus is the major regulator of ANS
3. D. Occipital lobe is the location of visual cortex.
4. F. Sensory areas are primary site responsible for perceiving cutaneous sensory sensations and proprioception.
5. E.Motor areas directs conscious motor movement
6. C. Cerebellum - coordinates movement by comparing intended movement with actual movement.
7. K. Corpus callosum allows communication between right & left cerebral hemispheres.
8. J. Frontal Lobe - Cognition, personality.
9. A. Hypothalamus - Contains hunger, thirst and thermoregulatory centers.
You want to build a house in an area with a maximum amount of species diversity. For building the house you have to clear up to 3/4th of the forest cover. How do you think this will affect the water runoff?
Answer:
The runoff will increases.
Explanation:
The runoff will be adversely affected if the 3/4th of the forest cover is removed because forest cover lowers the intensity of runoff by absorbing most of the water. The construction of house will increase the runoff due to little vegetative cover for the absorption of water and more water will runoff on the surface that will leads to flood condition in the lower elevated region of that area. The vegetative cover of the forest helps in preventing the flood condition by absorbing the runoff water.
the amount of electrical energy that can be generated by a hydroelectric power plants depends upon
Answer:
The amount of electricity a hydropower plant produces depends on two factors: How Far the Water Falls. The farther the water falls, the more power it has. Generally, the distance that the water falls depends on the size of the dam.
Explanation:
The amount of electrical energy that can be generated by a hydroelectric power plant depends upon the following factors:
The actual flow rate of water. The height of the water that falls. What is a Hydroelectric power plant?A Hydroelectric power plant may be defined as a renewable source of energy that generates electricity through the utilization of water from dams or diversion structures. Such types of plants are mainly used to transform hydraulic potential energy into electrical energy from water.
The actual flow rate and height of the water from it is falling demonstrate the amount of generated electrical energy. If the amount of water is present in excess quantity with a huge rate of flow and more the height of water in the hydroelectric power plant, it reveals that the generated electricity must be high under such circumstances.
Therefore, the rate of flow and height of water overall reveals the amount of electrical energy that can be generated by a hydroelectric power plant.
To learn more about Hydroelectric power plants, refer to the link:
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A person who has allergies has a compromised immune system because the body's immune system
attacks its healthy cells.
overreacts to an antigen.
steals nutrients from healthy cells.
responds to mutagens.
Answer:
B
Explanation:
The only connective tissue without fibroblasts is
(a) areolar connective tissue
(b) bone
(c) cartilage
(d) blood
Answer:
d d d d ................... blood
Which is the most likely cause of tropical storms?
A - Water runoff from the land fuels storm clouds.
B - High Pressure air causes storm clouds to form.
C - Sea breeze close to shore push storm clouds together.
D - Warm water evaporates, rises quickly, and interacts with a colder air mass
PLZ HELP will mark brainliest
The chart below shows the primary energy production methods in two locations.
Location Energy production method
A burning of fossil fuels
B geothermal energy
If both the locations produce the same amount of energy, which of these statements best describes the difference between the two locations?
Location A experienced higher installation costs for energy than Location B.
Location B experienced higher installation costs for energy than Location A.
Location A uses a lesser amount of electricity than Location B.
Location B uses a lesser amount of electricity than Location A.
Answer:
Location B experienced higher installation costs for energy than Location A.
Explanation:
This is correct because with geothermal energy, it is still being experimented with, so the power plant installation will be more costly. It is also correct because the knowledge on geothermal energy is not as significant compared to fossil fuel. Because the world used to mainly use fossil fuels, we know more about it. So, the production of a geothermal plant has to be exact and will be more costly. I also got this right on my quiz.
Hope this helps!
The statement 'Location B experienced higher installation costs for energy than Location A' is correct about energy production methods.
What are renewable sources of energy?Renewable sources of energy are energies that may be obtained indefinitely from the environment.
The renewable sources of energy have important benefits associated with the obtention of clean energy.However, these sources of energy (e.g. geothermal energy) exhibit high installation costs.In conclusion, the statement 'Location B experienced higher installation costs for energy than Location A' is correct about energy production methods.
Learn more in:
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Place these events in the correct order of occurrence in the muscle contraction: End plate potential triggers an action potential Transverse tubules convey action potentials into the interior of the muscle fiber Acetylcholine binds to receptors on the motor end plate Calcium is released from the sarcoplasmic reticulum Ligand-gated channels open leading to depolarization Calcium ions bind to troponin, which then moves tropomyosin
Answer:
1. Acetylcholine binds to receptors on the motor end plate
2. Ligand-gated channels open leading to depolarization
3. End plate potential triggers an action potential
4. Transverse tubules convey action potentials into the interior of the muscle fiber
5. Calcium is released from the sarcoplasmic reticulum
6. Calcium ions bind to troponin, which then moves tropomyosin
Explanation:
Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.
hello I am Iron-60 , the twin of Iron-56, how am different than my twin?
What does each region of the kidney have in it?
Answer:
Outer cortex, Middle Medulla, and Renal Pelvis.
They all have a lot of Blood vessels(something they share in common).
Explanation:
The kidney is made up with three regions; the outer cortex, the middle medulla (with the renal pyramids) and the inner-most renal pelvis.
Which of the following is equivalent to 36 + 8
Answer:
i- its 44, my mans just add up the answers and see which one equals 44
Explanation:
A scientist at a nuclear power plant spills toxic chemicals on her hand. The chemical exposure results in a mutation to the DNA within her skin cells. which of the following is the most likely result of the mutation to the scientist’s skin cells?
A. The damaged DNA spreads to every cell in the body
B. The size of the scientist’s skin cells decreases
C. The scientist’s offspring inherit the mutation from the affected cells
D. The sequence of amino acids with the affected cells is altered
Answer:
Explanation:
the answer is c
A prospective groom, who is not affected by cystic fibrosis (CF), has a sister with cystic fibrosis, an autosomal recessive disease. Their parents are also not affected. The brother plans to marry a woman who has no history of CF in her family. What is the probability that they will have a child with CF? They are both Caucasian and the overall frequency of CF in the Caucasian population is 1/2500 - that is, 1 affected child per 2500 (assume the population meets the Hardy-Weinberg assumptions).
Answer: In punnett square number 1, we see the cross between AA and aa, and the result is 100% Aa individuals, so there is 0% chances of haveing a child with CF. In punnett square number 2, we see the cross between Aa and aa and there is 50% chances of having a child with CF (aa genotype).
p = 0.98
q = 0.02
p² = 0.9604
q² = 0.0004
2pq = 0.0392.
Explanation:
Due to technical difficulties, the explanation has been attached as a word document.
Which of these best predicts the length of time a star "lives" on the Main-sequence and the path it follows as it evolves over time?
its mass
its color
its name
its location
Answer:
its mass is the answer I just look up some research
If dogs has 78 chromosomes in each somatic cell, how many chromosomes does each dog sperm have?
Is it possible for 2 dog spend cells to simultaneously enter a dog egg? Why or why not?
Answer:
1.Normal dog semen contains 300 million to 2 billion sperm. The quantity of sperm varies depending on the weight and size of your dog, with the bare minimum sitting at around 10 million sperm cells per pound of bodyweight.2.yes because The heat cycle of the female lasts from 18 to 21 days. ... Eggs remain fertile for about 48 hours. ... Dogs mature sexually earlier than they do emotionally.6. Which of the following is a nonmetal?
a. Fe
b. AI
C. N
d. Si
Answer:
C nitrogen!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Match the following terms to their definitions. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Words can be used more than once. ResetHelp Diverging circuit Converging circuit Reverberating circuit Parallel after-discharge circuit 1. : One incoming axon triggers responses in ever-increasing numbers farther and farther along the circuit. 2. : May be involved in complex, exacting types of mental processing. 3. : Involved in control of rhythmic activities such as breathing. 4. : Involved in activating fibers of a skeletal muscle such as the biceps muscle. 5. : Different types of sensory input can have the same ultimate effect.
Answer:
1. Diverging circuit.
2. Parallel after-discharge circuit.
3. Reverberating circuit.
4. Diverging circuit.
5. Converging circuit.
Explanation:
A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.
Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.
Generally, the nervous system found in living organisms such as humans, comprises of two (2) major components or systems; a central nervous system (CNS) and a peripheral nervous system (PNS).
A neural circuit can be defined as a group of neurons in the body of a living organism which are interconnected by synapses to perform specific functions when they're activated.
There are four (4) main types of neural circuits used for performing specific neural functions in the body of a living organism, these includes;
1. Diverging circuit: one incoming axon triggers responses in ever-increasing numbers farther and farther along the circuit. For example, a neuron that stimulates thousands of cells such as sensory pathway to the central nervous system (CNS).
2. Parallel after-discharge circuit: may be involved in complex, exacting types of mental processing. For example, it used in reflex arcs, mathematics and logic.
3. Reverberating circuit: involved in control of rhythmic activities such as breathing and as such it's repetitive in nature. For example, short-term memory, sleep cycle, etc.
4. Diverging circuit: involved in activating fibers of a skeletal muscle such as the biceps muscle.
5. Converging circuit: different types of sensory input can have the same ultimate effect. For example, the regulation of the somatic motor neuron.
What is the function of neurotransmitters?
a) to transmit nerve impulses to other nerves or organs
b) to stimulate the production of epinephrine
c) to transmit nerve impulses inside the nerve
d) none of the above
What is the speed of a runner who travels 20m in 10s?
Answer:
2m/s
Explanation:
speed =distance ÷time
how does the soil environment support the earthworm in the students hand