Answer:give me brainliest
Explanation:
A combination of the Q wave, R wave and S wave, the “QRS complex” represents ventricular depolarization. Ventricular depolarization occurs in part via an accessory pathway (AP) directly connecting the atrium and ventricle and thus capable of conducting electrical impulses into the ventricle bypassing the AV-His Purkinje conduction system.This term can be confusing, as not all ECG leads contain all three of these waves; yet a “QRS complex” is said to be present regardless.
Explanation:
QRS complex represents as ventricular depolarisation
Question 12 of 20
When a substance changes from a solid to a liquid, what happens to the
motion of its particles?
A. They move more slowly and become fixed in position.
B. They move at the same speed but in random directions.
C. They move more quickly and independently.
O D. They move more quickly and begin to move past one another.
SUBMIT
Answer:
Option C
(You could visualise ice to water for an example)
A scientist examines a cell using a microscope and notes that the cell has a large number of mitochondria and ribosomes. Within the cell are proteins that can contract. Which of the following is the most likely cell type?
Muscle cells can contract in response to stimuli. Moreover, muscle cells also have a large number of mitochondria and ribosomes for energy requirements and protein synthesis, respectively.
All muscle cells can contract by the interaction of myosin and actin proteins, which form myofibrils, the repeating molecular structure of sarcomeres (the sarcomeres are the functional and structural unit for contraction). The globular heads of myosin bind to actin filaments, forming cross-bridges that cause the muscle cells to contract and expand.Ribosomes are organelles required for protein synthesis. Muscle cells have a lot of proteins, especially actin and myosin myofibrillar proteins, which are responsible for muscle fiber structure.Mitochondria are the energetic centers of the cell. In consequence, thousands of mitochondria can be observed in cells with high energy requirements such as muscle cells, which release a large amount of energy quickly for movement.Mitochondria, using oxygen available within the cells and metabolize food biomolecules to generate ATP (the energy coin of the cells) that power up the cell.Learn more here:
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Check all the bones in the axial skeleton:
- Mandible
-Carpus
-Parietal
-Ulna
-Coccyx
-Sternum
- Clavicle
-Sacrum
Answer:
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Explanation:
[tex]all \: the \: bones \: are \: mentioned \: in \: the \: picture[/tex]
2x - 5 = 7
slove for x
2x-5=7
2x=7+5
2x=12
x=12/2
x=6
_______
what is the significance of t tubules?
Explanation:
The significance tubules are the site of spermatogenesis where germ cell develop into spermatozoa in close interaction with sertoli cells.Answer:
Explanation:
T-tubules are invaginations of the plasma membrane, which are present exclusively in striated muscle. Their role is to maintain the SR calcium store under the tight control of membrane depolarization via the voltage sensor channel DHPR .
What is the structure of the middle ear?
Answer:
The middle ear is a narrow air-filled cavity in the temporal bone. It is spanned by a chain of three tiny bones—the malleus (hammer), incus (anvil), and stapes (stirrup), collectively called the auditory ossicles.
Explanation:
Hope this helps!;)
What is conjugation?
A. when two haploid cells fuse and reproduce
B. when two organisms exchange information and reproduce
asexually through mitosis
C. when a cell divides and produces two identical cells
Answer:
when two organisms exchange information and reproduce
Gymnosperm is an advanced group than pteridophytes. Justify this statement with any five points.
Five major reasons why gymnosperms are more advanced than pteridophytes are highlighted below:
WHAT ARE GYMNOSPERMS AND PTERIDOPHYTES?
Gymnosperms are a group of higher plants that produce naked seeds i.e. seeds not cased by a fruit. Pteridophytes are a group of lower plants that have vascular bundles.
WHY ARE GYMNOSPERMS ADVANCED THAN PTERIDOPHYTES?
Gymnosperms bear seeds while pteridophytes bear spores (seedless)Gymnosperms do not require water for fertilization to occur while pteridophytes require water for their fertilizationGymnosperms have a well developed root system while pteridophytes do not have a well developed root system (they use rhizoids)Gymnosperms exhibit secondary growth while pteridophytes do notGymnosperms undergo pollination while pteridophytes do not.Learn more at: https://brainly.com/question/10517712
Which of the following processes
describes a cell undergoing exocytosis?
A. cell eating
B. diffusion
C. removing water and waste
D. moving molecules along a concentration gradient
Answer:
C. removing water and waste
Explanation:
Exocytosis occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin.
Hope this helps
Answer:
[tex]\boxed {\boxed {\sf C. \ Removing \ water \ and \ waste}}[/tex]
Explanation:
We are asked to find a description for a cell undergoing exocytosis. First, let's define the process.
Exocytosis is a type of active transport, so ATP or energy is required to initiate and complete the process.
This process moves substances from the inside of a cell to the outside. Molecules are packaged into vesicles. The vesicle moves to the cell membrane and attaches. The vesicle fuses with the membrane and the molecules inside the vesicle are released.
Essentially, substances are removed from the cell. This is especially useful because it can rid the cell of any waste or excess water. Therefore, the correct answer is choice C.
Please I really need your help.
Answer:
yes I can help you your question??
need help ASAP …….………
Answer:
B.
Explanation:
Question=>Research=>Hypothesis=>Experiment=>Analysis=>Conclusion
Drag each label to the correct location.
Using the legend, arrange the minerals that you tested according to their hardness. The hardness will increase from left
to right.
Mineral Letter
Quartz
sypsum
Gy
calcite
C С
magnetite
M
graphite
Gr
feldspar microcline F
apatite
A
tale
Hardne
Nourite
Mardines - 6.5
pyrite
Q GY CM Gr.
FA
From left to right, the correct order of the minerals from the least hard to the hardest is ⇒ Graphite, Talc, Gypsum, Calcite, Fluorite, Apatite, Magnetite, Pyrithe, Feldespat, Quartz.
Theoretical frame:
Hardness is one of the physical properties of minerals and is a significant one when identifying and recognizing them.
Hardness measures the resistance level of a surface to abrasion. In the specific case of minerals, it measures how minerals resist being scratched or penetrated.
The hardness level is determined by an attempt to scratch or produce a mark on an unmarked surface using sharp elements, such as nails, copper coin, glass, or a steal knife. Notice that these elements also vary in their hardness.
There are different methods used to define hardness, and they are not comparable to each other. The Mohs hardness method defines an ordinary qualitative scale that characterizes the mineral according to their resistance to being scratched by a harder element.
According to the Mohs hardness scale, the level in which the given minerals are placed is as follows,
Graphite ⇒ 1 - 2Talc ⇒ 1Gypsum ⇒ 1.5 - 2Calcite ⇒ 3Fluorite ⇒ 4Apatite ⇒ 5 Magnetite ⇒ 5 - 6.5Pyrithe ⇒ 6Feldespat ⇒ 6 - 6.5Quartz ⇒ 7Link to a related question:
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all biomolecules are mad up of the elements. A.carbon, hydrogen, nitrogen, oxygen, and sulfur B. carbon, hydrogen, nitrogen, and oxygen C. carbon, hydrogen, and oxygen D. carbon, hydrogen, oxygen, and sulfur
Answer:
Option(A) carbon ,hydrogen,nitrogen,oxygen and sulphur.
Answer:
A.carbon, hydrogen, nitrogen, oxygen, and sulfur
Explanation:
There are five elements that are essential to life. These are Carbon, Hydrogen, Nitrogen, Phosphorous and Sulfur, or CHNOPS for short. We can see that only option A has nitrogen listed. Nitrogen is absorbed by plants through the soil, and by animals through food. It is absolutely essential for many forms of life, especially plants and animals. Many biomolecules contain Nitrogen. Only one choice on this list contains nitrogen and that is option A. Therefore option A is the answer.
I need help please ??????!!!
hi i haven't done physics for like 3 yrs but i'm pretty sure
the one on top is a rarefaction
number 2 a compression since it's all compressed together
and number 3 has to be wavelength since that's the measure of a single wave
Please help me with these questions
I will mark the Brillianest
Answer:
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Why is it important to have a taxonomy or classification of types of collection and how does that help us understand the development of collection strategies, technologies, collection planning, and methods of collection
Answer:
Classifying and characterizing various types of collection helps us to identify and understand the capabilities and limitations of each type.
Explanation:
By understanding these factors, we are better able to request support, layer collections, and provide a complete collection plan that best addresses our intelligence gaps. Collection strategies ultimately start with these gaps. By understanding all of your available collection capabilities, you can more effectively manage these assets to accomplish the mission. In most cases, you will not be able to have every type of asset or collection medium under the sun, so it becomes even more critical to understand the strengths and weaknesses of those available. Doing so will help a collection manager most effectively utilize the assets available to them to accomplish the collective organizational mission or end state. Without characterization and classification, you cannot fully understand and thus employ the myriad of tools available effectively (Found on a site not mine)
Taxonomy allows us to organize and categorize collections based on their characteristics, which makes it easier to understand the various types of collections that exist and to compare them.
What is taxonomy?All of the world's plants, animals, and microorganisms are included in taxonomy, which is the science of naming, describing, and classifying species.
For a number of reasons, taxonomy, or the classification of collection kinds, is crucial.
Secondly, taxonomy enables us to classify and organize collections based on their traits, which facilitates comprehension of the numerous sorts of collections that exist and allows for simpler comparison.
To ensure that collections are properly managed, preserved, and available for future generations, taxonomy is an essential tool for understanding the development of collection strategies, technologies, planning, and techniques of collecting.
Thus, it is important to have a taxonomy or classification of types of collection.
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What's the main characteristic of porosity?
A. Porosity is a description of how pores are shaped and connected.
B. Porosity is the location at which aquifers are located for water flow.
C. Porosity describes the material found within soil and classifies the absorption capacity of that material.
D. Porosity is how much space there is in rocks and soil to hold water.
Answer:
The answer should be D
Explanation:
because poroslty of a rock is a measure of its ability to hold a fluid. mathematically, it is the open space in rock divided by the total rock volume.
Devy AI likes to learn! Tell me what the answer to this question is!
The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function, what is the greatest number of points that can lie in Quadrant II?
[Answer] The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function what is the greatest number of points that can lie in Quadrant II?
The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function what is the greatest number of points that can lie in Quadrant II? The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function what is the greatest number of points that can lie in Quadrant II ? The graph of f ( x ) consists of 14 points . Six of the points lie in Quadrant I of the coordinate plane . If f ( x ) is an odd function the greatest number of points that can lie in Quadrant II is eight. Explanation: In mathematics symmetry means that if a central dividing line (a mirror line) can be drawn on it. The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function what is the greatest number of points that can lie in Quadrant II ? Mon Aug 17 2015 · The graph of f(x) consists of 14 points. Six of the points lie in Quadrant I of the coordinate plane. If f(x) is an odd function what is the greatest number of points that can lie in Quadrant II ? one two six eight The graph of f ( x ) Consists of 14 points . Six of the points lie in quadrant one of the coordinate plane . If f ( x ) is an add f...
Ecosystems rely on interdependence between species to keep balance. Which of the following is a threat to a stable
ecosystem?
A. Loss of biodiversity
B. High biodiversity
C. Low biodiversity
D. Increase in biodiversity
Answer:
loss of biodiversity
Explanation:
Biodiversity- refers to the variety of life on Earth at all its levels, from genes to ecosystems, and can encompass the evolutionary, ecological, and cultural processes that sustain life.
loss in biodiversity affect food chains greatly
thanks
hope it helps
State the harmful effects of industrial microorganisms
Answer:
The primary harmful effects of microbes upon our existence and civilization is that they are an important cause of disease in animals and crop plants, and they are agents of spoilage and decomposition of our foods, textiles and dwellings.
Explanation:
may this answer is helpful for you
the different between microspores and pollen grain
The key difference between microspore and pollen grain is that microspore is the small spore that develops into the male gametophyte in plants while pollen grain is the small grain that contains the male gametophyte.
what is genetic variation
Answer:
The difference in DNA between individuals or between groups is referred to as genetic variation. Mutation and genetic recombination are two of the many causes of genetic diversity.
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why can animals move and plants can't?
Answer:
Plants make their own food from sunlight, water, and carbon dioxide (part of the air). Making food like that is slow, so if they moved around too quickly, they'd starve to death. So, though they do move, it's usually very slowly.
Animals get their food from plants or from other animals. Moving around is a way for them to get more food, not just to use it up. It's also a way to avoid getting eaten.
(Even plants which appear to "eat" food, such as a venus flytrap, are actually only getting vitamins and minerals that way, not extra energy.)
Explain why fabrics made with elastic fibre with the trade name “lycra’ are extensively used in foundation garment industry today. You may use their special characteristics and properties.
Answer:
Fabric name
Lycra
Fabric also known as
Spandex, elastane
Fabric composition
Polyether-polyurea copolymer
Fabric breathabilityn
High breathability
Moisture-wicking abilities
High
Heat retention abilities
Low
Stretchability (give)
Extraordinarily high
Prone to pilling/bubbling
High
Country where fabric was first produced
United States
Biggest exporting/producing country today
China
Recommended washing temperatures
Warm or cold
Commonly used in
Underwear, socks, bras, sports bras, bike shorts, yoga pants, hiking apparel, motion capture suits
#hope this helps u some #
The essence of meiosis is that a. specialized cell division reduces the chromosome number by half b. gametes are formed that are diploid c. specialized cell division doubles the chromosome number d. gametes are formed that are haploid e. a and d are correct
Answer:
e. a and d are correct
Explanation:
Meiosis produces 4 daughter cells that are haploid. Haploid means they have half of the chromosomes of the parent cell.
The essence of meiosis is that specialized cell division reduces the chromosome number by half and gametes are formed that are haploid.
Therefore option e is the right answer.
What is meiosis?A single cell splits twice during the meiotic process, resulting in four cells with half the original genetic material. These cells are our sex cells—eggs in females and sperm in males—and they are produced by a specific form of germ cell division in sexually reproducing species. Two rounds of division are necessary, and the end product is four cells with just one copy of each chromosome. The goal is to produce gametes, or sperm and eggs, that contain half of the parent cells' genetic makeup. Meiosis is characterized by DNA replication, two rounds of cell division, and the production of four daughter cells, each of which has half as many chromosomes as the parent cell.To learn more about meiosis, refer
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What is the difference between dominance, incomplete dominance and co-dominance
According to Sandel, when companies companies attempt to incentivize employees to quit smoking:__________
a) It never works.
b) There are no data on this incentive scheme.
c) It tends to work.
d) Employees tend to return to smoking when the incentive ends.
Answer:
employees tend to return to smoking when the incentive ends
Explanation:
because employees love to smoke on breaks and they are addicted to smoking.
Energy transformation and production in the cell are the functions of
which organelles?
Describe the parts of the building blocks of lipid
Answer:
Glycerol and fatty acids are the basic building blocks of fats (lipids). Fats are the product of the esterification of the trivalent alcohol glycerol with fatty acids of different lengths (between 12 and 20 carbon atoms). Two important representatives of the lipids are triglyceride (90% of fats) and cholesterol.
Which of the following is considered a Time/Temperature control for safety (TCS) food?