Explanation:
Medulla oblongata controls consciousness and arousal (the reticular formation) and its three vital reflex centers control the blood vessels diameter, heartbeat and breathing rate (the involuntary actions). This makes option D correct. The lower part of brain stem forms the hind brain which comprises of medulla oblongata, pons and cerebellum. This makes option C incorrect as medulla is not part of forebrain. Cerebellum is the convoluted subdivision of brain stem and is associated with coordination of muscular movement, muscle tone and balance i.e. the voluntary actions. Option B is incorrect. Spinal cord, along with brain, forms central nervous system which serves to integrate the sensory inputs from internal and external environment as received by sensory neurons and process and finally transmit the nerve impulses to effectors (muscles and glands). This makes option A incorrect.
Q. 35 One treatment for high blood pressure is taking diuretics that prevent the kidney collecting ducts from reabsorbing water. How would diuretics reduce blood pressure? By increasing blood volume By decreasing blood volume By increasing heart rate By decreasing heart rate
The diuretics will increase the volume of urine. That means more water is taken from the blood and excreted. According to Boyle's law, the volume is proportional to the pressure(p1v1=p2v2). It means that if we decrease the volume of blood we also decrease the pressure.
That means second option
An ecologist hypothesizes that predation by a particular owl species is the major factor controlling the population of a particular rabbit species. The first step in testing this hypothesis would be to determine
Answer:
The correct answer is - whether owl eats the rabbits.
Explanation:
A hypothesis is a proposed answer for an unexplained event that doesn't fit into the current acknowledged logical hypothesis. The essential thought of a hypothesis is that there is no pre-decided result.
The Hypothesis can be proved or disproved by scientific research that has various steps but initiailly testing the hypothesis is essential:
- Making assumptions.
- Stating the research and null hypotheses
- Selecting the sampling pattern and specifying the test statistic.
- calculating the test statistic.
-Making a decision and interpreting the results.
Thus, the first step after forming a hypothesis is to check or test the hypothesis which is null hypothesis -whether owl eats the rabbits.
Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely Group of answer choices
Answer:
the cell is most likely a plant cell in cytokinesis
Explanation:
Cytokinesis simply means the division of the cytoplasm. It happens after the telophase stage of the cell division and leads to the formation of two distinct cells.
Cytokinesis in animal cells involves the constriction of the plasma membrane from the equator of the cell outward until two distinct cells result. The process starts from the anaphase and continues through the telophase stage of the cell division.
Due to the presence of cell walls in plant cells, cytokinesis does not just involve the constriction of the plasma membrane but the formation of cell plates at the equator of the cell. The cell plate fuses with the plasma membrane, eventually dividing the cell into two with the formation of cell walls between the two membranes of the cell plate.
The cell is most likely a plant cell undergoing cytokinesis.
CYTOKINESIS:
Cytokinesis is the process whereby the cytoplasm divides into two halves. Cytokinesis proceeds nuclear or mitotic division. Cytokinesis occurs in both plant and animal cells with similar result, however, they occur differently. In plant cells, a cell plate forms in between the cell, which serves as the point of division into two cells. However, in animal cells, a cleavage furrow is rather formed. Therefore, the cell observed to be forming cell plate is most likely a plant cell undergoing cytokinesis.Learn more: https://brainly.com/question/10606931?referrer=searchResults
Which is one common property of inorganic substances They are solid at room temperature They are poor conductors of electricity They contain carbon They burn readily
Answer:
They are solid at room temperature
Explanation:
Hope it helps.
Answer:
Answer A
Explanation:
Which of the following is connective tissue?
Based on this information, what is the highest magnification power that Stella's microscope can achieve?
Answer:
400 x
Explanation:
The highest magnification power of Stella's microscope is 400 x. magnification refers to the enlargement of size of an object. Due to this magnification, parts of the identified object such as cell can be seen clearly. 400 X means that the cell size is maximize up to 400 times as compared to its original size. Different microscope has different magnification power. The highest magnification power of light microscope is 1500x while the highest magnification power of electron microscope is 10,000,000x.
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A fine-grained igneous rock forms
Choice B is the right option since the cooling is fast.
The minerals may not have enough room to develop owing to a sudden cooling and therefore their structure is delicate and glassy. The composition of an igneous rock depends on how quickly the magma is cooled when the volcanic eruptions occur. Slow cooling allows big crystals to grow while rapid cooling allows tiny crystals to appear.
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Identify the parts of the female reproductive system by labeling the diagram.
1. Fallopian tube.
2. uterus
3. Fimbriae
4. ovary
5. cervix
6. vagina
hope this answer correct :)
Drag each tile to the correct box. Arrange the steps in the correct order to describe how a reflex occurs. A receptor detects a signal. A sensory neuron sends a signal to the spinal cord. A bone moves. A relay neuron sends a signal to a motor neuron. A muscle receives a signal to contract. ↓ ↓ ↓ ↓
The reflex arc is the sequence of events since a stimulus reaches the body, until the body reacts to it. The correct order is a, b, d, e, c.
What is the reflex arc?The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts to it.
In general terms,
A stimulus of varying nature reaches the body. The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-. The CNS processes the information and sends another signal as a response to the stimulus.This mechanism is known as the reflex arc.
Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.
There are three types of neurons involved in the mechanism:
• Afferent or sensorial neurons
• Interneurons
• Efferent or motor neurons
Action:
Ascending branch1) The stimulus reaches the body and is received by the specialized sensory receptors.
2) Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy.
3) Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.
Descending branch4) Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response.
5) Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.
6) Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.
7) Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.
In the exposed example, the corrcet order is
a- A receptor detects a signal.
b- A sensory neuron sends a signal to the spinal cord.
d- A relay neuron sends a signal to a motor neuron.
e- A muscle receives a signal to contract.
c- A bone moves.
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Describe what might be a possible structure for this new type of membrane. Describe what might be a possible structure for this new type of membrane. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
The question is incomplete. The complete question is as follows:
Imagine a new type of cell was discovered on Mars in an organism growing in benzene, a nonpolar liquid. The cell had a lipid bilayer made of phospholipids, but its structure was very different from that of our cell membrane.
Describe what might be a possible structure for this new type of membrane.
A. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior.
B. This membrane would have the polar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
C. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophobic interior.
D. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
Answer:
D. This membrane would have the nonpolar groups on the two surfaces facing the nonpolar solvent, and it would have a hydrophilic interior.
Explanation:
As per the description of the membrane, the membrane is made up of phospholipid and phospholipid are consist of two hydrophobic tails (non-polar) and one hydrophillic (polar) head.
As the cell membrane is growing in a non-polar liquid, benzene, the non-polar groups or hydrophobic tails will face the nonpolar solvent, as it will repel by the hydrophillic interior and polar head will face the interior of the memebrane.
Hence, the correct answer is D.
how does an Amoeba obtain its food
Answer:
through the process of endocytosis or phagocytosis,
Answer:
Amoeba Obtain Its Food By
Amoeba envelops its food through the process of endocytosis or phagocytosis, where pseudopodia is created by flexibility of the plasma membrane. ... Amoeba takes in food using temporary finger-like extensions of the cell surface which fuse over the food particle forming a food-vacuole
Explanation:
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Valves in veins are formed of the tunica media. cause venous blood flow to go in only one direction. are found only in the largest veins. make the use of a skeletal muscle pump unnecessary for venous blood flow. are the leading cause of high blood pressure.
Answer:
they get larger.
Explanation:
Which of the following is true about Peptidoglycan? A. Makes up the cell wall of prokaryotes. B. Folded part of the cell membrane. C. Contains genetic information. D. Fluid that fills the cell.
Answer:
answer is a
Explanation:
a
The following is true about Peptidoglycan - A. Makes up the cell wall of prokaryotes
Peptidoglycan
is a rigid envelope surrounding the cytoplasmic membrane of most bacterial species. It helps protect bacterial cells from environmental stress and helps preserve cell morphology throughout their life cycle
The major component of the bacterial cell wall is peptidoglycan or murein.gives the cell shape and surrounds the cytoplasmic membranemade from polysaccharide chains cross-linked by unusual peptides containing D-amino acids.Thus, The following is true about Peptidoglycan - A. Makes up the cell wall of prokaryotes
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what is an example of codominaces
Answer:
a person with type AB blood or a roan fur in cattle which is when cattle have a mixture of white and red fur
The Center for Disease Control and Prevention recommended that men infected with Zika virus delay planned pregnancies. What is the recommended length of time for delayed conception for men afflicted with Zika virus?
Answer:
This should be 6 months
Explanation:
Generally ZiKa disease is caused by Zika virus,It is transmitted by Aedes mosquito as vector.It symptoms(rashes,fever,joint pains) are mild in the first week,but very severe in pregnant women.Men who visited then endemic region are advised to delay intercourse for 3 months,while those who were infected were recommended to abstain from sex for 6 months,
This is because the virus has been found in the semen longer than other body fluids.it has been found in infected semen for 180 days after healing.
In infected pregnant women,this can be transmitted to the fetus,causing microcephaly in the unborn child,Protection against mosquito bites is best way of prevention.
In exposed lady the period of abstinence should be 2 months.
What two changes occurred on Earth during the most recent Ice Age?
Answer:
became very cold, most animals became extinct they did
Explanation:
correct is it
-yoda
The Two changes that occurred on earth during the most recent Ice age are :
The Weather was extremely cold Most animals went extinctThe recent Ice age
The last ice age occurred about 11700 years ago. This was a period when the glaciers covered most part of the earth. Because of the glaciers covering most parts the weather was extremely cold and this lead to the extinction of most animals that could not survive in severe weather conditions.
Hence we can conclude that the two changes that occured on earth during the most recent Ice age are :
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While synthesizing a new blue pigment, a chemist notices that the new compound accumulates between an aqueous (water) environment and a hydrophobic environment. When added to a mixture of oil and water, the pigment creates a blue ring around the droplets of oil. Which of the following statements best describes this new pigment?
A. The pigment is amphipathic, having polar and nonpolar regions.
B. The pigment is probably hydrophobic and is attempting to bond with the oil.
C. The pigment is hydrophilic and will not form hydrophobic bonds with the oil.
D. The pigment is a polar molecule and is forming hydrogen bonds with both the water and oil molecules.
E. The pigment is neither polar or nonpolar, but is apolar.
Answer: C
Explanation:
Does not build hydrophobic bonds with oil because it is hydrophilic.
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GEOLOGY Please help, need to turn it. Summarize the relationship between the composition, temperature, and volatile content of magmas and effusive vs. explosive eruptions.
Answer:
The classification of the single issue is outlined in the section represented in segment explanations below.
Explanation:
The highly unstable magma composition consists of small quantities of water as well as sewage, published as pressure decreases. The magmas established by regional metamorphism are also richly volatile in nature.The affectionate eruption has become a category of the explosion where the lava spreads rapidly at the on-the-surface eruption, individuals are most prevalent in sedimentary magmas, often occur spontaneously. Because of elevated heat, the fuels are withdrawn throughout magmas.However, in volcanic explosions, the magmas have been most aggressively ejected from the volcano whenever pressure at either the exhaust pipe is abruptly actually reduced.How does a leaf protect itself from unwanted intruders like bacteria from getting in and stopping important reactants from going out?
Answer:
The cuticle layer on the outside of the leaf
Explanation:
In four to eight sentences, trace the flow of carbohydrate macromolecules through a rain forest ecosystem. State how the marcomolecules are produced, how they are passed along, and what they are eventually used for. In your answer, give specific examples of macromolecules.
Answer:
Carbohydrate is a big source of energy for all living organism on this planet.
Explanation:
The carbohydrate which is a macro-molecule is produced by the producer such as trees and shrubs etc in the process of photosynthesis. These carbohydrates transfer to the primary consumer such as monkey who eat these plants. When the secondary consumer such as jaguar eat these primary consumer, this carbohydrate again transfer from one organism to another organism. This carbohydrate is a source of energy which is broken down in the stomach into glucose and this glucose is absorbed by the cells and releases energy by mitochondria in the form of ATP. This energy is used in various activities such as walking, running and breathing etc. Carbohydrate, proteins and fats are the examples of macro-molecules.
Answer:
hi
Explanation:
Using your answers from Part 2, trace the path that energy flows in the ecosystem. What evidence does this give you about where energy in an ecosystem comes from?
Which substance is used as an oxidizing agent in the chemical industries? Write its chemical name and formula.
Answer:
Hydrogen Peroxide is usually used as an oxidizing agent in the industries.
Chemical Name: Hydrogen Peroxide
Formula : [tex]H_{2}O_{2}[/tex]
Answer:
[tex]\boxed{\mathrm{H_2O_2}}[/tex]
Explanation:
Hydrogen peroxide is used as an oxidizing agent in the chemical industries.
The chemical name is Hydrogen peroxide.
Hydrogen peroxide is a chemical compound with the formula [tex]\mathrm{H_2O_2}[/tex].
The last few miles of the marathon are the most difficult for Heather. Her hair is plastered to her head, sweat clings to her arms, and her legs feel as if they had nothing left. Heather grabs a cup of ice water. The ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. Then a breeze kicks up and she finally feels some coolness against her skin. Drops of sweat, once clinging to her forehead, now spill down, and Heather feels a stinging as the sweat flows into her eyes.Sweat on Heather’s forehead and arms formed drops because of the ______.
Answer:
heat.
Explanation:
Answer:
Hello! I am sorry I am late.
The answer is heat.
Explanation:
Hope this answer helped you. Have a great day or night! Good luck on your work!
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DNA is very small, one complete turn of a DNA helix is about _______.
Explanation:
DNA is very small, one complete turn of a DNA helix is about ___3.4 nm___.
DNA is very small, one complete turn of a DNA helix is about 3.4 nm or 34 Angstrom long.
What is DNA?DNA stands for Deoxyribonucleic acid. DNA may be defined as a molecule that is composed of two polynucleotide chains that coil around each other to construct a double helix.
This molecule is also thought to carry genetic information based on the individuals and deliver instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses.
One complete turn of a DNA helix consists of 10 base pairs. So, the pitch of the helix is found to be 3.4 nm and the two strands are right-angled coiled.
The distance between the two base pairs in a helix is 0.34 nm.
Therefore, DNA is very small, one complete turn of a DNA helix is about 3.4 nm or 34 Angstrom long.
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The graphic below shows how photosynthesis and cellular respiration are related.
Answer:
Humans and animals both are depend on the cellular respiration. When o2 is released by plant is inhaled by animals and humans and exhale carbon dioxide.
Explanation:
Oxygen is stored during photosynthesis and produce oxygen in cellular respiration. Carbon dioxide and water are used in photosynthesis released cellular respiration. The energy that is releases during photosynthesis is stored by the process of cellular respiration. Glucose is broken down during the process of photosynthesis, to produce the food in cellular respiration.
The relationship shows that both are reactant to each other. The photosynthesis used sunlight , water and carbon dioxide to produce the glucose. The cellular respiration used that oxygen and water to produce carbon dioxide.
Ocular albinism is an X-linked recessive trait that causes a lack of pigmentation in the eyes.
A father with ocular albinism and a mother without the trait have a daughter.
What is the percentage chance that the daughter will have ocular albinism?
Answer:
It occurs in about 1 out of 17,000 people. The chances are low that the daughter will have ocular albinism. I can't calculate the exact amount.
Explanation:
Question:
Ocular albinism is an X-linked recessive trait that causes a lack of pigmentation in the eyes.
A father with ocular albinism and mother without the trait have a daughter.
What is the percent chance that the daughter will have ocular albinism?
Answer:
CORRECT (SELECTED)
0%.
Explanation:
In order for a daughter to be affected, she must be Xg Xg There is a 0 in 4 chance that they will produce a child with this genotype.
Tara has two dogs. They win many of the agility competitions they enter. These competitions test a dog's ability to
run, jump, maneuver around and through obstacles, and follow complex instructions. These two dogs have a litter of
puppies together.
Which description most correctly describes these puppies?
The puppies are guaranteed to win agility competitions.
O With training, the puppies are likely to excel at agility competitions.
O The puppies will be born with the ability to complete agility competitions.
O Without training, the puppies are no more likely to succeed at agility competitions than any other dog.
Mark this and return
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Answer: Y'all its b
Explanation:
Answer:
B)
choose b edg20
Mules are considered to have many superior characteristics compared to the horse or burro. Mules are often stronger, agile, and can jump higher than either of their parents. Why are mules considered to be a weak hybrid and not a separate species?
Answer:
Because they are sterile
Explanation:
Mules are considered to be a weak hybrid and not a separate species because they are sterile and cannot produce progeny of their own.
Mules are hybrid products from two separate species - a donkey and a horse.
A species is generally defined as a group of organisms that are capable of breeding to produce fertile offspring. Hence, in order for them to have the potential of being categorized as a separate species, they must be able to produce their own progeny but this is not the case.
what are chloroplasts? why are they green? how is the green colour plant of a great importance to the whole living world? explain?
Answer:
Chloroplasts are structures found in the cytoplasm of plant cells that are the site for photosynthesis. They are green because they contain a pigment called chlorophyll. Chlorophyll absorbs light to bring about the photosynthesis reaction. Light energy is crucial to initiate photosynthesis.
Photosynthesis allows the plant to convert carbon dioxide from air and water absorbed from the roots into oxygen and glucose, which are foods for plants. By releasing oxygen to air through photosynthesis, other living things can breathe in oxygen so that energy can be generated through another process, called respiration. Respiration is like the reverse reaction of photosynthesis, but it turns glucose to energy that supports living things.
Because plants also respire to generate energy, by using the glucose produced from photosynthesis, it also supports the food chain in the living world. Other organisms can consume plants for their energy.
In the end, chloroplasts and the chlorophyll inside are very important to the living world.
What are digestive enzymes? Give three examples of digestive enzymes and briefly describe their specific functions.
Answer:
Digestive enzymes are the natural substances our body needs to help break down and digest food
We have three main digestive enzymes :
Proteases: These enzymes break down protein into small peptides and amino acids.
Lipases: break down fat into three fatty acids plus a glycerol molecule.
Amylases: Are responsible for breaking down carbs like starch into simple sugars.
Explanation:
Digestive enzymes are proteins that catalyze mainly hydrolysis reactions that make nutrients absorbable in the digestive tract. Pepsin is a gastric enzyme that turns proteins into albumoses and peptones which are shorter peptide chains that are then hydrolyzed to even shorter chains until amino acids by intestinal enzymes. Pancreatic amylase is an enzyme that turns starch(a polysaccharide) into maltose(a disaccharide). Lipase is present in the gastric juice, the pancreatic juice, and the intestinal juice. This enzyme catalyzes the hydrolysis of lipids(mainly triglycerides) into fatty acids and glycerol. When incomplete hydrolysis occurs triglycerides can become monoglycerides.
differentiate Sympathetic and parasympathetic nervous system
Answer:
Sympathetic nervous system makes the body ready to fight or fight response during any danger in the body.
While
Parasympathetic nervous system slow the body from performing too much work there by restoring the body to calm and composed state
Explanation:
The autonomic nervous system is divided into two; the sympathetic and parasympathetic nervous system. The autonomic nervous system controls the involuntary actions of internal organs and glands.
The sympathetic nervous system originate from the spinal cord and and it's is responsible for accelerateing the heart rate, constricting blood vessels, and raising blood pressure. Thereby preparing the body to fight or fight response against any danger.
The parasympathetic nervous is a part of autonomic nervous system that also originate from the spinal cord which which slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. By doing this,it prevent the body from overworking itself and restore the body to a calm and composed state.