Answer:
Is the merging of DNA from unrelated organisms to create new genetic varieties
Explanation:
Recombinant DNA creates transgenic organisms. Foreign DNA from another species can be incorporated in the genome of another species through several ways such as electroporation and transduction. The transgenic organism will, therefore, exhibit traits coded for by the foreign genetic material. This form of biotechnology/genetic engineering is used to modify characteristics of an organism so it exhibits desired traits.
Grasses → mice → cat → coyote
As matter and energy move from grasses to coyotes the amount of available energy
Answer:
decreases 10%
Explanation:
Answer:
Explanation:always decreases but population size may increase or decrease
Which question can be answered using the
i think A would be right if they are taking ab the scientific method
A certain strain of bacteria divides every 2 hours. If a colony is started with 80 bacteria, then the time t (in hours) required for the colony to grow to N bacteria is given by t = 2 log(N/80) log 2 . Find the time required for the colony to grow to two million bacteria.
Answer:
The time required for the colony to grow two million bacteria is 29.22.
Explanation:
Time required for the colony to grow can be calculated by the following equation:
[tex]t=2log(N/80)/log 2.[/tex]
Here t is time, N = 2 million (require bacteria population).
[tex]t=2log(2,000,000/80)/log2[/tex]
t ≈ 29.22
Time taken by bacteria to grow is 29.22.
The given question involves calculating the time required for a bacterial colony (which grows exponentially) to expand from 80 to two million bacteria. This can be done using the given mathematical formula t = 2 log(N/80) / log 2, where N represents the number of bacteria at a certain time.
Explanation:The given question is about bacterial growth, which follows an exponential pattern. The formula to calculate the time required for the colony to grow to a specific number of bacteria is t = 2 log(N/80) log 2, where N is the number of bacteria at a certain time, and t represents time in hours.
For this situation, we need to find the time t for the bacteria colony to grow from 80 to two million bacteria. So we plug N = 2,000,000 into the equation and solve for t.
Therefore, t = 2 log(2,000,000/80) / log 2. After solving this equation, it gives the time required for the colony to grow to two million bacteria.
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On which bone does External Acoustic Meatus occurs?
Answer:
External Acoustic Meatus occurs in the temporal bone
Explanation:
External Acoustic Meatus is also known as external auditory canal. This canal is circular in structure and contains cartilage, bones, ceruminous gland.
External Acoustic Meatus is located on the temporal bone. This bone is located on the the lateral side and the base of the skull. Four parts of temporal bone are mastoid, squamous, tympanic and petrous.
What is the major function of the neuron?
Answer:
Pass information by generating electric signals
Explanation:
Neurons are the fundamental unit of the nervous system. Neurons send information across the body through generation of electric signals called as action potential. There are basically three types of neurons
a) Sensory neurons which carry information from the sense organs in the form of impulse to the central nervous system (CNS)
b) Motor neurons – These carry information from the CNS to the body parts such as sense organs, muscles etc.
c) Interneurons – They are connecting neurons which are responsible for transferring information from one neuron to the other neuron.
Answer:
The major function of neuron is the transmission of nerve impulse.
Explanation:
Neurons or nerve cells are the electrically excitable cells that transmit information from one part of the body to another by transmitting nerve impulse. Neuron is the structural and functional unit of nervous system.
Sensory neurons carry nerve impulse from the receptor cell and transmit it to the brain. Inter neurons are present between sensory and motor neuron. Motor neurons carry information from the brain to the effector organ. Effector organ may be any muscles, glands or hormones.
True or False. Osmosis is an active process of the cell.
Answer:
mitochondria its the correct one
Explanation:
Which of the following tissue types often provides a blood supply to the other three tissue types?
a. Connective
b. Nervous
c. Epithelial
d. Muscular
Answer:
d. Muscular
Explanation:
Muscular tissue is divided into three major groups: Skeletal Muscle Tissue (large majority of muscles), Heart Muscle Tissue (muscle of the heart) and Smooth Muscle (muscle that involves some organs and tissues).
The heart is an organ made up of muscular tissue. It is the contractile activity of this tissue that gives the heart its role as a blood-pumping organism. Cardiac muscular tissue usually provides a blood supply to other types of tissue.
Billy arrives in your clinic. His parents state Billy has become progressively weaker and does not like to run and play outside as he easily fatigues. Billy is diagnosed with a myopathy (muscle disease), and can not make adequate ATP through aerobic cellular respiration. You suspect that Billy's ____ are functioning abnormally and may be the cause of his fatigue and myopathy. SELECT ONE ANSWER.
a. Lysosomes
b. Golgi appratus
c. Mitochondria
d. Unable to determine based on information given
e. Nucleus
f. Rough Endoplasmic Reticulum
Answer:
c. Mitochondria
Explanation:
Mitochondria are the double membrane-bound structures and are the site for aerobic cellular respiration. The process of aerobic cellular respiration produces a large amount of ATPs which are used by cells for other functions.
As per given information, Billy is becoming weaker and experiences fatigue due to lack of ATP through aerobic cellular respiration, his mitochondria in his muscle cells may not be functioning properly. lack of ATPs might be due to abnormal mitochondrial functioning.
Which hormone works directly in the intestine to increase plasma calcium levels?
A. parathyroid hormone (PTH)
B. calcitonin
C. calitriol
D. renin
The hormone that works directly in the intestine to increase plasma calcium levels parathyroid hormone (PTH). The correct option is A.
PTH is a hormone generated by the parathyroid glands, which are situated near the thyroid gland in the neck. PTH is essential for calcium regulation in the body.
PTH is released into the circulation by the parathyroid glands when blood calcium levels are low.
PTH increases plasma calcium levels via acting on various target organs, including the intestines, bones, and kidneys.
PTH promotes calcium absorption from dietary sources in the gut. It increases the production of active vitamin D (calcitriol) in the kidneys, which improves calcium absorption in the intestines.
Thus, the correct option is A.
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Explain 3 factors that contribute to the abuse of alcohol, tobacco and other drug abuse.
Answer: Family, Social and Neglect
Explanation:
Family Risk Factors: Family risk factors include childhood maltreatment in which the parent child relationship, marital status of parents, level of understanding among the family members also influences the abuse of alcohol and drug abuse.
Social Risk Factors: The society in which the person or child is living also influences the drug, tobacco and alcohol abuse. A teenage easily gets influenced by the society and place where they are living.
Neglect: If a person feels neglected emotionally by the partners or parents then there is an increased chance of alcohol or drug abuse. If the important necessities of life such as education, clothes, food is fulfilled by the guardians then also there are chances that a person might get towards alcohol and drug abuse.
Substance abuse is influenced by family history, witnessing domestic violence, and media exposure. Genetic predisposition, particularly related to alcoholism, and one's sociodemographic background also play roles in the likelihood of substance abuse, which has significant individual and societal impacts.
There are several factors that contribute to the abuse of alcohol, tobacco, and other drugs. One critical factor is family influence, where having family members afflicted with alcoholism or drug abuse increases the likelihood of substance abuse in offspring. Witnessing violence between parents or caretakers is another factor, as it can lead to substance use as a coping mechanism. Additionally, a third factor is the exposure to and normalization of substance use through media, such as watching disproportionate amounts of violence or drug use on television.
Genetic predisposition is also discussed as a contributing factor, especially pertaining to alcoholism. Although research is more conclusive on alcohol than other drugs, there is evidence to suggest that those born to alcoholic parents may have a higher risk of developing similar problems themselves. This predisposition combined with sociodemographic backgrounds and environmental factors serves to heighten the risk of substance abuse.
The use of substances like alcohol and tobacco can also be attributed to the physiological, psychological, and social satisfaction they provide, making them appealing despite their harms. It's essential to consider these factors when addressing and creating policies to combat substance abuse. The harms caused by substance abuse are significant, impacting not only the individual but also leading to broader societal issues such as child abuse and neglect.
what is the state of Michigan doing to fix the problem of purple loosestrifes?
The state of Michigan has faced a big problem with an invasive species of plant in its wetlands. The plant is seemingly harmless and beautiful, and while there's no argument about the beauty of it, it is actually very destructive toward the local flora and because of it the fauna as well. In order to solve the problem with the purple loosestrifes, the state of Michigan has asked for help from the professionals in the universities to find out a solution. The scientists managed to figure out a way in which they can lower significantly the density of this invasive species and mostly restore the native flora, and the salvation was in certain species of insects. Some insects are natural predators of this plant, thus they destroy it, so several species of insects have been released at the places where this plant had spread out. The effects have been excellent, as the insects did their job properly, managing to reduce significantly the amount of purple loosestifes, enabling the native flora to get its territory back.
Which of the following might cause chronic hemorrhagic anemia?
A) Iron deficiency in the diet
B) Decreased EPO production
C) A bleeding ulcer
D) Sickle-cell anemia
Answer:
c
Explanation:
a bleeding ulcer - chronic hemorrhagic anemia depends a lot on the volume and speed of blood loss
Which of the following activities is most closely associated with NK cells?
Options:
production of antibodies
release of reactive oxygen intermediates
production of IL-6
killing of virus-infected cells
phagocytosis of bacteria
Answer:
killing of virus-infected cells
Explanation:
Natural killer (NK) cells is the major component of immune system and a type of white blood cells that play an important role in immunity. Protease enzyme is present in the NK cells.
Natural killer cells can identify the virus infected cells and activates the cascade mechanism to kill the virus cells. Natural killer cells release cytokines that can kill the virus infected cells.
Thus, the correct answer is option 4.
Which of the following statements regarding the endomembrane system is false? The endomembrane system is involved in the synthesis, storage, and export of important molecules. The endomembrane system includes the rough and smooth endoplasmic reticulum. The endomembrane system includes the nuclear envelope. The endomembrane system is a system of interrelated membranes that are all physically connected.
Answer:
Option (4).
Explanation:
Endomembrane system is may be defined as the sysytem that divides the cell into functional compartment or organelle. The organelle of endomembrane system are nuclear envelope, rough and smooth endoplasmic reticulum, golgi body, lysosomes, vesicle and plasma membrane.
Endomembrane system contains different membranes of cell organelle are suspended in the cytoplasm of the eukaryotic cell. Tge endomembrane system helps in synthesis, packaging and export of important proteins and molecules.
Thus, the correct answer is option (4).
The dendritic region of the neuron serves as what part of the neuron (in terms of information processing) and what type of electrical signal is measured in the dendritic region?
a. Input, graded potential
b. Input, action potential
c. Output, graded potential
d. Output, action potential
Answer:
The correct option will be option A (Input, graded potential).
Explanation:
The transfer of impulse through neurons takes place in the form of the action potential. these action potential are generated in the dendrite and moves along the axons which move to another nerve cell at the synapse.
Graded potential is the change in the membrane potential which can be depolarizing and hyperpolarizing depending on the stimulus. This graded potential which leads to action potential is generated in the postsynaptic dendrite.
Since dendrites receive the signals from the pre-synaptic axon of the neuron at a synapse it is also called the input region.
Thus, option A (Input, graded potential) is the correct answer.
What are the ways that mitosis and meiosis are used in the body?
Answer: Mitosis is cell group that transpires in practically all tissues, ending in the growth and restoration of tissues and organs.
Explanation:
Hope this helps
The _________ chamber has the thickest wall.
The two lower chambers are the ventricles, which have thick walls and force blood out of the heart by way of arteries The left ventricle has the thickest walls because it is the major pumping chamber of the heart.
Neurotransmitter molecules are stored in ______________.
In synaptic vesicles.
Neurotransmitter molecules are stored in vesicles within neurons. During neurotransmission, these vesicles release neurotransmitters into the synaptic cleft through exocytosis.
Explanation:Neurotransmitter molecules are stored in small intracellular structures called vesicles. These vesicles are crucial for the transmission of signals in the nervous system, where they store neurotransmitters until the neuron is stimulated. Upon stimulation, the vesicles move toward the cell membrane and release their contents into the synaptic cleft through a process known as exocytosis. This release allows neurotransmitters, such as dopamine, to diffuse across the synapse and bind to receptors on the postsynaptic neuron, thereby transmitting the nerve impulse. Neurotransmitter systems, like the dopamine system, play a key role in neurological processes and behaviors, and their dysfunctions are related to neurological diseases such as Parkinson's and schizophrenia.
Neurotransmitter molecules are stored in vesicles inside neurons. These vesicles contain the neurotransmitters that are released into the synapse between neurons to transmit signals. When a neuron is appropriately stimulated, the vesicles fuse with the cell membrane and release their contents through a process called exocytosis.
Inhibin is secreted from the _________ and acts to reduce the secretion of _________.
a. hypothalamus; LH
b. Sustentacular cells; FSH
c. Leydig cells; FSH
d. Leydig cells; LH
e. anterior pituitary; FSH
Answer:
b. Sustentacular cells; FSH
Explanation:
Sertoli cells are the sustentacular cells of seminiferous tubules since they serve to give structural support to the germ cells. Likewise, sustentacular cells are also present in ovaries.
The sustentacular cells of testes and ovaries serve to secrete inhibin hormone. The function of inhibin hormone is to inhibit the release of follicular stimulating hormone (FSH) from the anterior pituitary gland.
Which layer of the skin contains the sebaceous glands?
What happens to metabolism if calorie intake remains below BMR for a significant period of time?
Answer:
Explanation:
BMR is short for the basal metabolic rate. It is the rate of expenditure of the energy per unit time by the body at the time of rest. In other words it can be said that it is the the total amount of calories required to keep the body to do the necessary vital functions even in rest. Some of the activities which are regulated in the body even the body in the rest are breathing, control of the body temperature, control of blood circulation, and contraction of muscles all these activities require the expenditure of calories.
If the calorie intake becomes severely low than the basal metabolic rate will also get lower the body will not function as it should be.
Which of the following grafts (transplant tissues) would be taken from elsewhere in a person's body?
a. Allograft
b. Autograft
c. Isograft
d. Xenograft
Answer: Allograft, Isograft and Xenograft.
Explanation: Grafting can be defined as a surgical procedure that is used to move a tissue from one part of the body to another or from another organism without bringing the blood supply along with the tissue.
Here, the grafting in which a piece of tissue or organ from another organism is introduced to person's body can be allograft, isograft and xenograft.
Allograft can be defined implanting tissue or organ from another individual of same species.
Isograft can be defined as implanting tissue or organ from genetically identical individual.
Xenograft can be defined as implantation of tissue or organ from different species.
So, the correct options are A, C and D
Weights of golden retriever dogs are normally distributed. Samples of weights of golden retriever dogs, each of size nequals15, are randomly collected and the sample means are found. Is it correct to conclude that the sample means cannot be treated as being from a normal distribution because the sample size is too small? Explain.
Answer:
The average weight in lbs. for a healthy golden retriever dog is between 75-85 LBS.
Explanation:
The sample size is too small, therefore the answer is true.
there is no indication in this question if the s. size is in lbs., kilos., or kilograms???
help !!!!?!!;!!:!/!$,&:’xndmsnsnnd
Answer:
its D
Explanation:
the second one in the first half is correct but the its not in the second half. good luck.
Why would you expect the sclera of the eyes to turn yellow as a result of jaundice?
Answer:
Due to the presence of high level of bilirubin.
Explanation:
Jaundice is the condition in which the skin and sclera of eyes turns into yellow. Improper functioning of liver mainly causes the jaundice condition in an individual.
The skin and body turns yellow in jaundice because the bilirubin pigment is deposited in the blood. The bile juice of the liver mixes with the blood and causes the yellowing of the skin.
Final answer:
The sclera of the eyes turns yellow in jaundice because of the accumulation of bilirubin, a yellow pigment that is not properly processed when the liver is functioning abnormally.
Explanation:
The sclera of the eyes turning yellow as a result of jaundice is due to the build-up of a yellow pigment called bilirubin in the blood. Normally, the liver processes bilirubin, which is a by-product of the breakdown of old red blood cells. However, if the liver is damaged, has decreased function, or if there is a blockage in the bile ducts, bilirubin cannot be processed effectively and starts to accumulate in the blood. As bilirubin levels in the blood rise, it begins to diffuse into the body's tissues, causing the skin and the whites of the eyes to turn yellow.
During ______, the muscle can no longer physiologically respond, i.e. contract.
Answer:
The answer to the question, would be: during fatigue.
Explanation:
Normally, a muscle fiber will respond to neurological stimulation to perform movement. In this case, the whole process of movement of the fiber results from the biochemical processes that lead the muscle to respond to calcium and use ATP, so that the chain reactions can be carried out, and the fibers can move. However, there is a point at which, ATP is depleted, and there is an overproduction of lactic acid, which prevents muscle fibers from further responding to stimulation from the motor neuron, regardless of the amount of ACh released to bind with the sarcomeres´ receptors. At this point, then, the muscle fibers are incapable of further responding to stimultation, and thus movement is stopped.
The sodium-potassium pump is also known as the sodium-potassium
a. ATP channel
b. ATPase
c. ATP synthase
d. channel
e. receptor
Answer: ATPase
Explanation: The sodium potassium pump is also known as ATPase.
This pump works by pumping potassium ions into the cell while pushing the sodium ions outside of the cell which is used to generate action potential across the cell membrane.
This pump performs active transport and the energy used for this process is derived from adenosine triphosphate. ATP is hydrolyzed and energy is energy is released which is used by this pump.
Hence, sodium potassium pump is known as sodium potassium ATPase.
The actual duplication of generic material in a cell takes place during
a. anaphase
b. metaphase
c. prophase
d. interphase
e. telophase
Answer:
d. interphase
Explanation:
The cell cycle has stages namely the interphase and M phase. Interphase is the stage of preparation for nuclear division, which is M phase. Interphase has three stages: G1, S and G2. The G1 and G2 are the phases of cell growth. The S phase of the cell cycle is also called a "synthetic phase". This is because DNA replication occurs in S phase of the interphase of the cell cycle.
Since DNA is genetic material, actual duplication of genetic material occurs in interphase.
Which cranial nerve innervates the thyroid gland?
Answer:
Vagus nerve
Explanation:
Vagus nerve is the tenth cranial nerve that can innervate in the neck, thorax and abdomen.
Thyroid gland is located below the neck region and releases thyroxine hormone. Vagus nerve innervates in the thyroid gland. Parasympathetic fibres of thyroid gland comes from the vagus nerve and symapthetic fibres is distributed in the superior, middle and inferior ganglia of sympathetic trunk of the thyroid gland.
Thus, vagus innervates in the thyroid gland.
Answer:
Vagus nerve
Explanation:
Vagus nerve is the cranial nerve that innervates the thyroid gland.
Which of the following is NOT an active part of the Blood-Brain-Barrier (BBB)?
a) endothelial cells
b) astrocytes
c) microglia
d) all of the above are part of the BBB