The invention of microscope allowed scientists to discover cells.
As a microscope we call an instrument that is used for the observation of objects too small (such as cells) to be seen with the naked eye.
The microscope is an optical instrument that increases the capacity of observation to levels of close-up such that it even makes possible the analysis of particles.
This instrument was invented by Zacharias Janssen in the year 1590.In 1665, the research carried out by William Harvey on blood circulation appeared, by analyzing blood capillaries.From then on, technical progress has been made by increasing the magnification level of microscopes, and this in turn, making the study of cells possible. In the middle of the 20th century, the invention of the electron microscope made it possible to know the three-dimensionality of cell structures and the spatial distribution of the molecular components within them.Therefore, we can conclude that the invention of microscope allowed scientists to discover cells.
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In science. something that stands the test of time, often without change; (2) experimentally confirmed; over and over and (3) universal
Answer:
It's the universal law, Learned this like a billion years ago
Explanation:
Just know it, the universal law can't be changed, it's in place all the time, and even tho scientists test it it never changes, because they can never find out it's wrong.
Answer:
Scientific law is the law that stands the test of time, often without change. It is experimentally validated and confirmed again and again with time. It helps in creating right predictions for different situations.
Explanation:
Scientific law is a universal law which is applicable for everyone in the earth and also has uniformity. However, theory does not stands the test of time. It can be applied facts that are unrelated and relationships that are new. The theory comes from observations and experimental evidences.
What climate region in North America is influenced by the
prevailing westerlies?
Answer:
Marine West Coast
During mantle convection, heat from the earth's core causes material in the mantle to expand and move upward. When it reaches the top, it __
Answer:
Cools, moves to the side, and sinks, making a circular pattern.
Explanation:
It cools because it dissipates some of this heat to the lower crust. As it moves to the side, it drags along the crust hence powering the tectonic movements. As it cools, the liquid rock becomes denser and begins to sink to the bottom of the mantle as more hot and less dense liquid rock from the bottom rises. This forms a circular convection loop similar to that of water in a container being heated from below.
Answer:
cools, moves to the side, and sinks, making a circular pattern
What gets rid of cell waste by breaking down larger molecules into smaller ones
Answer:
Lysosomes
Explanation:
is also called as suicidal bag of the cell as it is involved in digestion of worn out or damaged cell or large molecules into smaller one by secreting digestive enzymes. The smaller molecules is excreted out of the cell though cell membrane.
Which statement is true about solutions?
Solutions are heterogeneous and can be physically separated.
Solutions are mixtures that can be physically separated.
Solutions are homogeneous and must be chemically separated.
Solutions are made up of two substances that are chemically combined.
Answer:
Solution are mixtures that can be physically separated
Explanation:
This is because we can separate solutions physically using some distinct separation techniques such as evaporation, simple distillation, distillation e.t.c
Answer:
The answer is Solutions are mixtures that can be physically separated.
Explanation:
A solution is a homogeneous mixture at the molecular or ionic level of two or more pure substances that do not react with each other, whose components are in variable proportions. A chemical solution consists of a solvent and one or more solutes. The solute is the substance that dissolves and the solvent that dissolves it. the solutions can be separated by physical processes
A friend goes to get a blood transfusion. Blood cells are 95%water you notice the nurse hanging a bag of 60%glucose to inject to your friend instead of blood. You will tell stop what did you think would happen to your friend's blood cells if they were transfused with sugar water instead of blood?
Answer:
The sugar will result in a formation of a clot the WBC cannot overcome and can result in a cardiac arrest, so the nurse should be stopped immediately.
What is a model?
A.a simplified, constructed version of a complex object or idea
B.an alternative, upgraded version of a complex object or idea
C.a detailed, more accurate version of a simple object or idea
D.a well-researched, identical copy of a complex object or idea
Answer:
C. a detailed, more accurate version of a simple object or idea
Explanation:
A model is a detailed, more accurate version of a simple object or idea.
Scientists use the process of genetic engineering to
change the arrangement of genes in an organism's DNA.
combine an organism's RNA proteins with its DNA.
insert the DNA of one organism into another organism.
map out the sequences of nucleotides in human DNA.
Genetic engineering often involves inserting the DNA of one organism into another to create GMOs. This uses recombinant DNA technology for purposes like agricultural improvements. Examples include Roundup-ready soybeans and borer-resistant corn.
Explanation:Scientists use the process of genetic engineering primarily to insert the DNA of one organism into another organism. This is achieved using recombinant DNA technology, where foreign DNA is added in the form of recombinant DNA vectors generated by molecular cloning. The organism that receives this recombinant DNA becomes a genetically modified organism (GMO). When the inserted DNA comes from a different species, the resulting organism is referred to as transgenic.
This practice has been applied to bacteria, plants, and animals since the early 1970s for various purposes including academic research, medical treatments, agricultural improvements, and industrial applications. A famous example of GMOs in the United States are Roundup-ready soybeans and borer-resistant corn, which are common in many processed foods.
What does a contour line show?
The steepness or the gentleness of the slopes is depicted by contour lines.
Explanation:A contour line is a function of two number of variables which forms a curve connecting the points of the equal value. It is a three dimensional diagram with the function with x and y variable parallel the plane (x, y) .
In cartography, a form line joins purposes of equivalent rise (tallness) over a given level, for example, mean ocean level. A contour map is a guide represented with form lines, for instance, a topographic guide, which along these lines indicates valleys and slopes, and the steepness or tenderness of inclines.
The form interim of a shape guide is the distinction in height between progressive shape lines.
Based on the benefits received from the Three Gorges Dam, China is planning four new dams for the Yangtze River further upstream. The new dams will provide nearly double the electricity generated at Three Gorges , and would trap sediments before they reach the Three Gorges Dam reservoir . Now that the environmental consequences of large dams are known , do you think that China should reconsider additional large hydroelectric projects ?
Answer:
No. China is already consuming third of the world's coal production for electricity, which is a serious challenge to the environmental. The trade off is fair so China should build the new dam.
No, you do not have to think that China should reconsider additional large hydroelectric projects. This is because of the fair trade-off in China that makes a difference.
What is a Hydroelectric project?A hydroelectric project may be defined as a type of renewable source of energy that significantly generates power through utilizing a dam or diversion structure in order to alter the natural flow of a river or other body of water.
Being the world's third largest producer of coal and electricity, China is creating a major threat to the environment that become one of the most potent reasons for climate change. But due to the existence of a fair trade-off in China, they are focussing on building a new and large number of dams to a larger extent.
Therefore, you do not have to think that China should reconsider additional large hydroelectric projects. This is because of the fair trade-off in China that makes a difference.
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Linda has a cup of coffee sitting in the cup holder in her car. She has to suddenly slam on her brakes and stop. The cup remained in the cup holder, but the coffee splashed and spilled everywhere. Newton's _____ law can best describe why this happened.
A. first
B. second
C. third
Answer:
A. First
Explanation:
Linda has some espresso kept in the cup holder in her vehicle. She needs to all of a sudden pummel on her brakes and stop. The cup stayed in the cup holder, yet the espresso sprinkled and spilled all over.
This happens on account of the Newton's first law of movement. It states that that an object at rest will remain at rest until and unless and external force is applied to it for its movement. It also describes the inertia.
How do respiration and photosynthesis affect the carbon cycle?
Which example involves a cell membrane receiving and sending messages?
O
A. A tube worm retreating from a predator
O
B. A large fish chasing its prey in the sea
O
C. A water molecule moving inside a cell
O
D. A protein forming a channel for an ion
The answers are: A and B
A. A tubeworm retreating from a predator
B. A large fish chasing is a prey in the sea
Further Explanation
The ability of cells to communicate, that is, receiving and sending signals from and to other cells, determines the interaction between unicellular organisms and regulates the function and development of the body of multicellular organisms. For example, bacteria communicate with each other in the quorum sensing process to determine whether they are sufficient before forming biofilms, while cells in animal embryos communicate to coordinate the process of differentiation into various cell types.
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Details
Class: Middle School
Subject: Biology
Keywords: cell communication
Answer:
A. A tube worm retreating from a predator
Explanation:
Cells can receive and send messages as a form of communication for a certain function within an organism to be performed. This function can be related to the regulation of some biochemical process, development of some activity and even when the organism needs to defend itself, escape or adapt quickly to environmental changes.
The ability to send and receive messages is regulated by the cell membrane. An example involves a cell membrane receiving and sending messages occurs in a situation where a tubular worm needs to retreat from a predator. At that moment, the cells communicate to carry out the escape and protection process.
What is the major source of water pollution that washes chemicals and other pollutants from improperly managed land
Answer:The U.S. Environmental Protection Agency (USEPA) provides the following definition of NPS pollution: Non-point source pollution generally results from land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification.
Explanation:
A species of Coral snake has a red, yellow, and black stripe pattern. One gene controls if the stripes are thick or thin. Thin(T) is dominant over thick(t). If two snakes heterozygous for this gene are crossed, what will be the phenotype(s) of their offspring? You may need to use a Punnett square to answer the question.
Answer:
75% with thin stripes, 25% will have thick stripes
Explanation:
A species of Coral snake has a red, yellow, and black stripe pattern. One gene controls if the stripes are thick or thin. Thin(T) is dominant over thick(t). If two snakes heterozygous for this gene are crossed, the phenotype(s) of their offspring wouldn't be even, making the answer, 75% with thin stripes, 25% with thick stripes.
5. The modern model of the atom shows
that electrons are
A. combined with neutrons in the nucleus.
B. located in a solid sphere covering the
nucleus.
C. orbiting the nucleus in fixed paths.
D. found in regions called orbitals.
o nobis
The answer is D. The first two answers would relate to neutrons and protons and the third answer is false due to electrons never found in a fixated path.
Answer:
D. found in regions called orbitals
Explanation:
Orbitals are regions in the electrosphere of the atom where the probability of finding the electron, or the wave function that describes the motion of an electron, is greatest.
According to Pauli's Exclusion Principle, each electron has a maximum of two electrons. For orbitals that do not have both electrons, we say they are incomplete and that they are isolated or unpaired electrons.
In addition, when filling orbitals, ie, doing electronic distribution, this should be done according to the Hund Rule or Maximum Multiplicity Rule, which says that this filling should be done in a way that gets as many as possible. of unpaired orbitals.
Consider this animal cell. Which organelles are labeled G? centrioles
lysosomes
endoplasmic reticulum
mitochondria
Answer:
The given cell represents an animal cell, in which the organelle labelled as 'G' is mitochondrion. Mitochondria are membrane-bound organelles and their inner membrane is folded inward to form finger-like structures or cristae.
The mitochondria are known as the powerhouse of the cells as they are site for biochemical reactions of respiration and energy production.
Thus, the correct answer is 'mitochondrion.'
Animal cells are the eukaryotic cells that lack cell walls. In the labeled diagram of the animal cell, G is the mitochondria. Thus, option d is correct.
The missing labeled image is attached below.
What is a mitochondrion?A mitochondrion is the most crucial organelle of the animal and plant cell that has a membrane and is involved in the generation of the energy required to drive the cell function.
The biochemical reactions and processes occur in the mitochondria that produce energy in the form of ATP and are a finger-shaped small structure in the cytoplasm of the cell.
Therefore, the labeled organelle is option d. mitochondria.
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Which is the primary function of glucose molecules? A. To make up the structure of cell membranes be. B. To act as a catalyst for chemical reactions C. To encode genetic information D.To provide energy for cell activities
Answer:
The primary function of glucose molecules is to provide energy for cell activities.
Explanation:
Glucose can best be described as carbohydrate which serves best as a primary fuel. Our body cells carry out a wide number of metabolic as well as biological functions. Glucose serves as the main energy derivation molecule for the accomplishment of these biological and metabolic functions. Every cell present in the body acquires the capability of using glucose as energy molecule.
Glucose is broken down by complex biological reactions into ATP which is the energy source for many cellular activities.
Answer:
D
Explanation:
it is a suger which means it also provides energy
Which of these is most like a closed system that does not allow transfers in or out of the system?
A Planet Earth
B A coral reef
C A school
D The human heart
Planet Earth is most like a closed system that does not allow transfers in or out of the system
Answer: A. Planet Earth
Explanation:
In a closed system, there is no exchange of mass. However, the energy might get exchanged. The exchange of mass and energy depends upon the property of the membrane or the boundary of the substance or an object.
The Earth is basically a closed framework; it acquires huge amount of energy from the Sun yet the exchange of matter with the outside is just about zero. Material streams between stores or sinks along pathways, or motions.
Please help me .....
Objective means that they are "facts", and do not include personal thoughts and beliefs (which is subjective).
In this case, your answers are:
1) Fact:
Facts are made based on data and analysis, and are supported by details and other known "facts" or truths. This means that they are right in any circumstances in most cases, or at least in the given circumstance that is provided.
2) Data:
Data is used to support the fact, which is objective. Without data, the claim would be seen as a opinion, or subjective, in meaning, a "I feel that it is this way". Without data, you will not have facts.
It is not:
3) Opinion:
Opinion is the antonym of Fact, and so if Fact is a answer choice, then Opinion is not. Opinion is based off of feelings, personal knowledge, and personal preferences. While useful in some cases, it is not objective.
4) Theory:
A theory is not objective, because it is a opinion that is provable (but is yet to be proven). This makes it subjective, until proven right.
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Location A receives the sun's rays at an angle. Location B receives the sun's rays head on. Which statement is most likely true? Both locations are at the poles. Both locations are at the equator. Location A is at the equator and Location B is at the poles. Location A is at the poles and Location B is at the equator.
Answer:
Location A is at the poles and Location B is at the equator.
Explanation:
Locations at the same place cannot receive the Sun's rays from two different directions.
That eliminates Options A and B.
The diagram shows that locations at the poles receive the Sun's rays at an angle.
Location A is at the poles and Location B is at the equator.
Answer:
Location A is at the poles and Location B is at the equator.
Explanation:
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hair cell divide how many times in a year
Answer:
Hair cells are present inside the inner ear that acts as a receptor of sound. Researchers affirmed that once there is a damage to the hair cell, it can regenerate in birds.
Damage hair cell can lead to loud noise which in turn affect the ear. The supporting cells are present along with the hair cells. When the hair cells get damaged, the supporting hair cell gets the signal to start the process of regeneration.
Hair cells divide rapidly during the anagen phase, which lasts between 2 to 7 years and is marked by the active growth of hair. The hair growth cycle includes a transition phase (catagen) and a resting phase (telogen) before restarting. The growth rate during anagen is on average 0.3 mm per day.
Explanation:The number of times hair cells divide in a year varies, as hair growth occurs in three distinct phases: the anagen phase, which can last from 2 to 7 years and involves rapid cell division at the hair root; the catagen phase, a brief 2-3 week period that transitions from active growth; and the telogen phase, resting for 2-4 months without new growth. At the end of the telogen phase, a new anagen phase begins, during which basal cells in the hair matrix produce a new follicle and push out the old hair. This cycle repeats throughout a person's life, and hair typically grows at an average rate of 0.3 mm per day during the anagen phase.
What are two ways animals contribute to the carbon cycle?
Final answer:
Animals contribute to the carbon cycle by exhaling carbon dioxide during respiration and via methane production in animal husbandry practices, both of which affect atmospheric carbon levels and can contribute to global warming.
Explanation:
Animals contribute to the carbon cycle in several significant ways. Firstly, they participate by releasing carbon dioxide (CO2) into the atmosphere as a byproduct of cellular respiration. When animals breathe, they take in oxygen and release CO2, which is a critical component of the global carbon cycle. Secondly, through the practice of animal husbandry, humans rear large numbers of livestock for food, which further contributes to the carbon cycle. These animals not only respire, releasing CO2 but also produce methane (CH4), a potent greenhouse gas, through enteric fermentation. Hence, animals influence both the natural carbon exchange in ecosystems and the anthropogenic impacts on the carbon cycle that can contribute to global warming.
What is one example of a primary succession
Answer:
Examples of where primary succession may take place include the formation of new islands, on new volcanic rock, and on land formed from glacial retreats.
What was the main reason for the settlement of the Plymouth Colony?
Freedom of religion and creating a Utopian society
Searching for gold and silver), making a profit (to become rich) and searching for
a Northwest Passage.
I do not know the answer
Provide a base of operations against Spanish and French aggression
To find a Northwest Passage to trade for spices
Answer:
The main reason behind Plymouth settlement is to achieve freedom of religion.
Explanation:
Some of the members of Separatist Church from England in 1620, September, during the era of King James I sailed towards Mayflower and ultimately landed in the Cape-Cod or Massachusetts. They finally decided to settle in the Plymouth Rock, the first permanent European settlement in New England, The Plymouth Colony.
The Separatist believed that the European Churches have somehow failed to perform the important works of Protestant Reformation, thus they left the Church and settled in Plymouth to regain freedom of religion and securing a better Utopian society there.
What is active transport?
Answer:
it is the movement of ions/molecules across a cell membrane into a higher concentration region which is assisted by enzymes and requiring energy
Explanation:
cellular energy to reach this movement
which survival need best defines "habitat"?
oxygen or carbon dioxide
someplace to live
food
water
Answer:
Someplace to live
Explanation:
Answer:
someplace to live
Explanation:
2. Which of the following sequences of organization is likely to
be seen in a multicellular organism, going from smallest to
largest?
a) cell, organ, tissue, organism
b) cell, organ, system, tissue
c) cell, tissue, system, organism
d) organism, system, organ, tissue
The levels of organization in a multicellular organism from a simpler perspective to a more detailed and complex one is cell, tissue, system, organism.
The cell is the minimum unit of life: all living beings are made up of at least one cell (some of only one of them, called unicellular; others of more than one, called multicellular organism).According to their functions and needs, cells are grouped together to fulfill a common function, this grouping of common cells is called tissue.The systems are composed of the different organs and tissues of the body cooperating, helping each other, or working together.The total of the organs, tissues and cells of a living being compose it, and define it as an individual, that is, an organism.Therefore, we can conclude that matter is organized in levels of complexity, these are, from smallest to largest are: cell, tissue, system, organism.
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Which resources would two different species in the same community
compete with each other for? Select the three correct answers.
A. Mates
B. Food
C. Space
D. Water
Answer:
b c and d
Explanation:
they are from different species therefore would not compete for same mates.
Answer:
food, space, water
Please fill in this I need help
Answer:
hypothesis
never become a law ideally should be tested... changedtentative scientific explanation... experimentationscientific theory
well tested explanation ... phenomena may still be useful ... supportedScientific Law
concise, specific descriptionhighly reliable scientific info