Answer:
b. False
Explanation:
Increasing the frequency of muscle stimulation causes wave summation to occur, which causes an overlap of muscle twitch. When this muscle summation happens, the force generated in the muscle increases. This means that stimulating the muscle every 0.5 seconds will generate less muscle contraction force than when stimulated every 0.05 seconds
Identify each of the following characteristics or descriptions as Lycopodium sp. or Selaginella sp., using the following key. (Both may apply to some characteristics listed.)
L = Lycopodium S = Selaginella
They have rhizomes that branch horizontally, producing aerial stems and underground roots.
Their leaves have a ligule, or tongue, on the upper surface.
They are heterosporus
They are homosporus.
They have strobili.
They have simple, scalelike leaves on branching stems from which roots arise.
They are known as ground pine.
They are known as spike moss.
nionger dars for many things, Based on the name "scouring rush," what quality best
Answer:
They have rhizomes that branch horizontally, producing aerial stems and underground roots. L
Their leaves have a ligule, or tongue, on the upper surface. S
They are heterosporus S
They are homosporus L
They have strobili. S L
They have simple, scalelike leaves on branching stems from which roots arise. S
They are known as ground pine. L
They are known as spike moss. S
Explanation:
Lycopodium is known as as ground pine, and is a genus of clubmosses. They are homosporus, because they produce only one type of sporangia, while Selaginella are heterosporus, because they produce microspores and megaspores, and they are known as spike moss. Both of them, lycopodium and selaginella can have strobili.
You palpate a soft, slightly tender mass in the right scrotum of an adult male. You attempt to reduce the size of the mass, and there is no change in the mass size. Your next assessment maneuver is to:________
a. use two fingers to attempt to reduce the mass.
b. palpate the left scrotum simultaneously.
c. lift the right testicle and then compare pain level.
d. transilluminate the mass
Answer:
d. transilluminate the mass
Explanation:
Sometimes, painless hard or tender mass develop in the scrotum of men and can cause testicular tumors.
After detecting a scrotal mass, to reduce the size of the mass, the next assessment required is to transilluminate the mass in which testicles will be appear opaque on transillumination. Transillumination of mass will help to detect the orientation of mass which can be treated further.
Hence, the correct answer is d. transilluminate the mass
n your lab you are studying the genome of venomous rattlesnakes to find the gene which codes for their venom glands. You have two rattlesnakes, one rattlesnake has a mutation but can still produce venom. You compare his DNA to a normal rattlesnake. What type of mutation has occurred? Normal: AATCGCTACGCACGTCAG Mutated: TATCGCTACGCACGTCAG
Answer:
There are no options but the kind of mutation that occurred by carefully observing both sequences is:
POINT SUBSTITUTION MUTATION
Explanation:
Mutation is any change, whether small or big, in the nucleotide sequence of a gene (DNA). Mutation occurs from time to time in an organism either by a mistake during DNA replication or induced by a mutagen (mutation-causing substance). Mutation can be of different types depending on the effect on the mutant.
In this case of comparing the DNA sequence two rattle snakes, the sequences of the two snakes are:
Normal: AATCGCTACGCACGTCAG
Mutated: TATCGCTACGCACGTCAG
By carefully observing the two DNA sequences, one would realize that the only difference in the two sequences is the first nucleotide base. That is, in the normal sequence, th first base is Adenine (A) while in the mutated sequence, the first base is Thymine (T).
This type of mutation that involves only one nucleotide base is called POINT MUTATION. It can also be noticed that base "A" was changed "T". Hence, this is a type of SUBSTITUTION MUTATION because a single base was replaced by another in the sequence.
After arousal by a sensory stimulus, consciousness can be maintained by positive feedback, because of activity in the
Answer:
This question lacks options, options are:
A) cerebral cortex.
B) basal nuclei.
C) sensory pathways.
D) motor pathways.
E) All of the answers are correct.
The correct answer is E.
Explanation:
The cerebral cortex processes and filters its information before passing the most relevant aspects to other regions of the brain. Some of these brain regions, in turn, send information back to the cortex. These loops, known as 'feedback systems', are considered essential for the functioning of cortical networks and their adaptation to new sensory information. Neural circuits must first assess the importance of incoming sensory information and then refine how it is processed in the future. Positive feedback, triggered with the purpose of amplifying the response to the initial stimulus, can be compared to a chain reaction or a vicious circle. Few are the functions regulated by this mechanism; rather it is triggered in pathological situations. It is the system by means of which the organism very rarely regulates any of the bodily functions under normal conditions, making the initial stimulus to be maintained and even increased. This type of mechanism is predominantly present in pathological situations: Its constitutive elements are: stimulus, receptor, afferent pathway, integrating center, efferent pathway, effector and response. The response does not have the ability to satisfy the initial stimulus.
What are the biological methods of controlling mosquito population?
Explanation:
Biological control or "biocontrol" is the use of natural enemies to manage mosquito populations. ... Effective biocontrol agents include predatory fish that feed on mosquito larvae
This category of plants does not have vascular tissue or seeds. Question 3 options: Angiosperms Gymnosperms Ferns Mosses
Answer:
Mosses
Explanation:
Mosses are the category of plants that does not have vascular tissue or seeds while angiosperm, gymnosperms, and ferns have vascular tissues and seeds.
Due to absence of vascular bundles or veins, the mosses also lack stems, true roots, and leaves. some of the examples of mosses are: liverworts, hornworts, and Ricceia natans etcetera.
Hence, the correct answer is "Mosses".
Answer:
Mosses
Explanation:
Mosses are the category of plants that do not have vascular tissue or seeds. Ferns do not have seeds, but do have vascular tissues. Angiosperms and gymnosperms have vascular tissue and seeds.
What is Ependymal cell?
Answer:
Explanation: Ependymal cell is a type of neuronal support cell the forms the epithelial lining of the brain ventricles in the brain and the central canal of the spinal cord ependymal cells similar to all other neuroglia, are derived from a layer of embryonic tissue known as neuroectoderm.
Ependymal cells are ciliated-epithelial glial cells. It develops from radial glia alongside the surface of the ventricles of the brain and spinal canal.
What is the function of Ependymal cells?The main role of Ependymal cells is formation of CSF.
The CSF refers to cerebrospinal fluid. It is done by movement of sodium ion, chlorine ion and bicarbonate ion from blood to ventricles of brain.
Inside ventricles of the brain, collection of ependymal cells and capillaries together i.e., the tela choroidea form choroid plexus, which produces the CSF.
Thus, Ependymal cells are involved in formation of CSF.
For more details regarding Ependymal cells, visit:
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What are the
traditional
circulatory
endpoints of
resuscitation
in shock?
Explanation:
traditional circulatory endpoints of resuscitation in shock include hypertension,tachycardia,decreased mentation and urine output
A client reports extremely frequent urination, sometimes urinating 10 to 12 times each day.
What fluid balance disorder would be expected with these symptoms?
Answer:
Lack of Antidiuretic hormone.
Explanation:
Antidiuretic hormone is a type of hormone which is responsible for controlling urination. It is produced in hypothalamus which is a part of a brain. Antidiuretic hormone is responsible to tell the kidney how much water in the body should be conserve to avoid dehydration. If less antidiuretic hormone is produced by the body so more urine is produced. Frequent urination is also occurs due to Diabetes insipidus. This disease produce more urination in order to control the concentration of glucose in the blood.
3. How would you describe the waxing versus the waning portion of the moon’s journey
Answer:
A lunar eclipse would occur when the Earth is between the sun and moon. ... 3How would you describe the waxing versus the waning portion of the moon's journey? The waxing is when the moon is “growing”, while the waning is when the moon is “shrinking”.
Production of maltose, by ___________________ condensation, dehydration, hydrolysis) of starch, in the presence of amylase, can be detected by colorimetric assay.
Answer:
Hydrolysis.
Explanation:
Maltose is produced by hydrolysis of starch, in the presence of amylase, can be detected by colorimetric assay. As per the assay of hydrolysis of starch we have concluded from the test of enzyme activity of amylase is that maltose being a reducing sugar which reacts and reduces the DNS (3,5-dinitrosalicylic acid) that is basically a pale yellow colored alkaline which results after some minutes into 3-amino,5-nitrosalicyclic acid which orange red colored alkaline after heating.
If pattern of inheritance is complete dominance what would you expect when a red and yellow fish were crossed
In the question, it is not mentioned that which fish is dominant and recessive, so lets consider red fish is dominant and yellow fish is recessive.
Answer:
In complete dominance, the dominant trait completely masks the recessive trait and the offspring shows dominant characters only.
When a red and yellow fish were crossed, the pattern of inheritance is complete dominance which means the offspring would have dominant characters.
As we considered, red fish has dominant trait so the offspring produced will also have red color as yellow color (recessive) will be masked by dominant red color fish.
The diagram shows a phase of mitosis. A phase of mitosis is shown. The chromosomes lined up at the center. Letter A represents long strings inside of the cell. Which does the letter A represent in the diagram?
I wish you added the diagram but I can tell that the long strings are the spindle fibres.
Answer:
the long string things are the fiber spindle thing
( sorry i'm not good at reading passages and citing from them... )
Based on the data table below, which number would be the BEST choice for the top number of the scale on the vertical axis of a scatter plot showing this data? (PLZ HELP ME UNDERSTAND AND ANSWER THIS:)
Answer:
D) 70
Explanation:
Vertical is going up so it would the highest number.
Which statement best describes geothermal energy? Geothermal energy can be used to fuel vehicles. Geothermal energy increases the risk of a nuclear accident. Geothermal energy is the most abundant nonrenewable resource. Geothermal energy can be used as a source of electricity.
Answer:
Geothermal energy
Explanation:
can be used as a source of electricity. hope this helps you :)
Answer:
D
Explanation:
Discuss Connell and Slatyer three mechanisms of succession. Start your answer with a definition and an example of what is succession, and describe how succession begins.
Answer:
Facilitation, tolerance and inhibition models
Explanation:
J. H. Connell and R. O. Slatyer stated three different ecological succession models that explain how species composition may change by the effects of disturbances in the ecosystem. These models are as follow:
1- Tolerance model: in this model, the new species don't affect the growth and success of existing species, thereby the process of succession is purely associated with life-history strategies.
2- Facilitation model: only 'ideal traits' found in colonizing species lead to the initial succession. These ideal traits include for example effective mechanism of dispersal, water storage tissues to survive in dry regions, long-term seed dormancy, etc.
3-Inhibition model: Species that appeared during early succession are capable of inhibiting growth of species appeared in later stages, as well as reduce colonizing species abundance.
Angiosperms exhibit a great variety of forms, as well as means of obtaining nutrients. Angiosperms can be ___________. (Circle the correct answer.) g
Answer: Options are not given.
Here are the options.
A. Autotrophs
B. Saprophytic
C. Parasitic.
D. Both a and b.
E. All of the above.
The correct option is all of the above.
Explanation:
Angiosperms are flowers and seed producing plants and their seeds are enclosed in ovary.The angiosperms are vascular seed plants in which the ovule (egg) is fertilized and then develops
into a or become a seed in an enclosed hollow ovary. They are most diverse and largest group of animal kingdom.
Some angiosperms are autotrophs that uses carbondioxide, water and sunlight energy to produce their own food and releases oxygen.
Examples include maize, rice..
Some angiosperms are saprophytic which obtain energy from dead and decaying matter in the soil. They form a symbiotic relationship with fungi. Example is Neottia.
Some angiosperms are parasitic and they attach to their host through haustoria their by feeding on the host and causing harm on the host.
1. Research 5 functions of the frontal lobe and explain them in detail with example.
2. Explain what you think might happen if someone damaged frontal lobe. You must mention the functions you have listed
Answer:
Solving a problem, memory, language, judgement, social and sexual behavior.
Explanation:
5 functions of the frontal lobe are given below:
1) it control the expression of emotions.
2) it is responsible in solving a problem.
3) it also control the memory and language.
4) it helps in judgement.
5) it is responsible for social and sexual behavior.
If frontal lobe is damaged, the individual may lose its memory, judgement ability. the social and sexual behavior is also disturbed. It may lose the ability to solve a problem and also have language problem.
If you insert a gene from bacteria into a mouse genome, then which terms best explains what you just made?
Answer:
a transgenic animal
Explanation:
How well do you think the exercised muscles would work after 30 minutes of rest instead of 30 seconds of rest between trials?
Answer:
We at Bright Side invite you to take a look at what you can expect from your body when you finally pull yourself together and start training. Illustrated by Ekaterina Gapanovich for Bright Side.
Explanation:
Possibility of causing unnecessary stress and strain on your muscles, especially your heart.
What if I didn't warm-up exercises before doing any physical activities?To help prevent injury, include static stretches in your cool-down routine. Static stretching as part of a maintenance stretching program can also help lower your risk of injury.Possibility of causing unnecessary stress and strain on your muscles, especially your heart. Inability to prepare the pathways between your nerves and muscles for a good workout. Inability to increase blood flow into muscle groups, which is critical for delivering oxygen and nutrients.Stretching is relaxing because it activates the parasympathetic nervous system and increases blood flow to the muscles.To learn more about : Static stretching
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Soil moisture that plants are capable of accessing and using is called Group of answer choices capillary water.
Answer:
Explanation:hv
Is lead renewable or not?
Answer:
it is not renewable.........
Answer:
Lead is not a renewable resource. It is a metal that forms naturally in the Earth, but it takes a very long time for metals to form.
why do veins have valves
A/An ______________________________ is a specialized radiographic examination of the uterus and fallopian tubes. Question 94 options:
Answer:
Hysterosalpinography
Explanation:
It is Hysterosalpingography because it is an x-ray examination of uterus and fallopian tubes that uses a specific type of x-ray called fluoroscopy and a radiopaque material. It is use to examine women who find it difficult in getting pregnant to examine the shape of the uterus.
Using specific examples, discuss the roles of negative and positive feedback processes that maintain homeostasis.
Answer:
Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points. In contrast to negative feedback loops, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.
b) How will you describe any three (3) major components of the environment to a named
class puyil?
Answer:
Hydrosphere, atmosphere and biosphere are the three major components of the environment.
Explanation:
Hydrosphere, atmosphere and biosphere are the three major components of the environment. hydrosphere refers to water bodies such as ocean, sea, ponds and lakes etc that is present in our environment. atmosphere refers to the gaseous layer which is present above the earth surface. in this layer oxygen, nitrogen and carbondioxide etc are present. biosphere refers to all living organisms such as human, animals, plants and microbes etc which are present on earth surface..
When you touch an object that is very hot you quickly pull your hand back.
What is the correct pathway of nerve impulses for this behavior?
Answer:
this is called reflect action
Answer:
reflex action
Explanation:
this is because, it makes it possible to swiftly pull back your hand if you accidentally touch a hot pan
Which two layers are approximately the same age?
core sample 1
core sample 2
Complete question:
Examine the following diagrams. Columns I and II contain rock layers A, B, C, D, E, and F. Both columns were taken from the same dig site at different locations. Which two layers are of approximately the same age? (Note: The diagrams are attached).
Answer:
C and D
Explanation:
Layers C and D apparently contain the same fossilized organisms in the same substrate. Their appearance is very similar. By knowing that certain organisms used to live in a certain period of time, if we find two strata that show the same fossilized organisms, then we can estimate that these two strata are the same age. Fossilized organisms are used to estimate the age of a rocky stratum.
Life history can be illustrated through fossilized organisms trapped or converted into rocks. These fossils are known as index or guide fossils, of animal or vegetal nature, and they can apport information about the rocky stratum in which they are located or incrusted. These fossils are used to determine the age of the rocky sediments or the environmental conditions under which they were deposited.
Answer:both of them are
Explanation:
How does the wheat stem rust fungus harm its host plant?
Answer:
The stem rust fungus produces several different structures during its life cycle. The most obvious of these on wheat are the reddish-colored urediniospores that form on leaves, stems, and heads during the growing season. These spores are spread by wind and infect wheat or barley plants.
Sources of geothermal power are
Answer:
Geothermal energy is produced by the heat of Earth's molten interior. This energy is harnessed to generate electricity when water is injected deep underground and returns as steam (or hot water, which is later converted to steam) to drive a turbine on an electric power generator.
