Answer:
vaccination
Explanation:
The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.
Answer:
vaccination
Explanation:
Choose the best definition of allele.
A. One of several possible versions of a gene, which each produce a different phenotype
B. An organism that's purebred for a given trait
C. The process of fertilizing a plant with pollen from another plant
D. A set of genes that are located on the same chromosome and so are tightly linked
Answer:
A. One of several possible versions of a gene, which each produce a different phenotype
Explanation:
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based on the information in the graph, which region is experiencing the greatest increase in its population? Europe, Africa, mexico, or asia
Answer:it is Asia
Explanation: they have the largest population. India is close second in population
Answer:
Africa i promise
Explanation:
which RNA is
found inside the nucleus?
Arrange the organization of life from simple to complex ?
Answer:
C. Cell, tissues, organs, organ systems
Explanation:
Cells are the basic unit of life and also serve as a structural unit of all living beings. Many cells are together arranged into tissues to carry out specific functions. A group of tissues together make an organ while a group of organs with related functions together make an organ system.
Hence, the organization of life from simple to complex is as follows:
Cell, tissues, organs, organ systems
The movement of carbon through an ecosystem is related to the flow of energy. What is the role of carbon dioxide in the flow of energy through an ecosystem? Carbon dioxide is absorbed by -
A: decomposers to help break down organic matter Strike Reset
B: producers and used to make sugars Strike Reset
C: primary consumers to help in the formation of ATP Strike Reset
D: secondary consumers and used to make proteins
The role of carbon dioxide in the flow of energy through an ecosystem. Carbon dioxide is absorbed by producers and used to make sugars Strike Reset
What are the function of carbon dioxide ?carbon dioxide is the union of One carbon atom and two oxygen atoms by forming a chemical compound, can be found in the atmosphere.
It is present as gaseous form in room temperature, carbon dioxide is released when human and animals exhale which can be taken by autotropic plants to make food by the process of photosynthesis.
It is a greenhouse gas present in very low concentrations in the Earth’s atmosphere, emitted from hydrocarbon fuels like burning of wood, coal; The fossil fuel released when Carbon reacts with oxygen to form carbon dioxide and water vapor.
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balanced equation for Fe+O2 ->Fe2O3
The answer is:
The balanced equation is:
[tex]4Fe+3O_2=2Fe_{2}O_{3}[/tex]
Why?Finding a balanced equation of a reaction means making equal the number of atoms for both reactants and products sides, according to the conservation mass law, the mass is always conserved, so, we need to make both quantities of atoms/molecules match.
So, we are given the following reaction:
[tex]Fe+O_2=Fe_{2}O_{3}[/tex]
For the reactants, we have 1 molecule of Fe and 2 of O
For the products, we have 2 molecules of Fe and 3 of O
So, balancing the Oxygen, we have:
[tex]Fe+3*O_2=Fe_{2}O_{3}[/tex]
[tex]Fe+3O_2=Fe_{2}O_{3}[/tex]
Now, there are 6 atoms of oxygen in the reactant, let's multiply the product by 2 in order to make both sides match, so:
[tex]Fe+3O_2=2*(Fe_{2}O_{3})[/tex]
[tex]Fe+3O_2=2(Fe_{2}O_{3})[/tex]
Now, we can see that there are 6 atoms of Oxygen in both sides, but there are 4 atoms of Fe in the products and just 1 atom in the reactants, so, we need to multiply the Fe by 4.
So, balancing the Iron (Fe) we have:
[tex]4*Fe+3O_2=2(Fe_{2}O_{3})[/tex]
[tex]4Fe+3O_2=2Fe_{2}O_{3}[/tex]
Hence, we can see that we now have the same number of atoms on both sides, we have:
[tex]Fe_{reactants}=4\\O_{reactants}=6\\Fe_{products}=4\\O_{products}=6[/tex]
Therefore, the equation is balanced.
[tex]4Fe+3O_2=2Fe_{2}O_{3}[/tex]
Have a nice day!
Which organelle stores most of a cell’s DNA?
Answer: the nucleous
Explanation:
The organelle that stores most of a cell's DNA is the nucleus.
The nucleus is a membrane-bound organelle found in eukaryotic cells, and it serves as the control center of the cell. Within the nucleus, the genetic material, which is in the form of DNA (deoxyribonucleic acid), is organized into structures called chromosomes. These chromosomes contain the genes that carry the instructions for various cellular processes and traits.
The DNA in the nucleus is responsible for the transmission of genetic information from one generation to the next and plays a crucial role in protein synthesis and cellular functioning. The nucleus also regulates the expression of genes and controls the replication and transcription of DNA.
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mendel used over 28,000 pea plants in his experiment. How does this large sample size make his results more reliable?
(I'm not sure about this one)
Answer:
it made his actual results approach the results predicted by probability
Explanation:
on apex
A series of connections of food chain in an ecosystem is called a what
Answer:
Food web
Explanation:
A series of connections of food chain in an ecosystem is called a Food web.
Hope this helps!
what is a gamete ????
A gamete is a haploid cell is produced by meiosis.
What is a gamete?Sperm refers to the male gametes found in the human reproductive system, while ova or eggs refer to the female gametes found in the reproductive system.
These are the reproductive cells that are produced as a result of the meiosis process.
Thus, we can conclude that option A is correct.
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Oceanic lithosphere is destroyed at _____.
divergent boundaries
ocean ridges
convergent boundaries
transform fault boundaries
Answer:
Oceanic lithosphere is destroyed at convergent boundaries.- third choice
Hello There!
Oceanic lithosphere is destroyed at “Convergent Boundaries
Convergent boundaries are places where two tectonic plates meet each other.
An order is subdivided into several _____.
An order is subdivided into several families.
In biological classification, the hierarchy of classification goes from broadest to most specific, with the order being a higher taxonomic rank than a family. The taxonomic hierarchy, commonly used in biology and ecology, follows this order: Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species.
An order is a rank or category that includes one or more related families. It groups together organisms that share some common characteristics but are more closely related to each other than to members of other orders. Within an order, the families share certain similarities, but they also have enough differences to warrant separate classification.
For example, let's consider the order Carnivora, which includes animals like cats, dogs, and bears. Within the order Carnivora, there are several families, such as Felidae (cats), Canidae (dogs), Ursidae (bears), and others. Each family represents a more specific group of related species within the broader order Carnivora.
Taxonomic classification is essential for organizing the vast diversity of life on Earth and understanding the evolutionary relationships between different groups of organisms. It allows scientists to study and categorize species based on shared characteristics and evolutionary history. Subdividing orders into families is just one step in this systematic approach to classifying and understanding the rich tapestry of life on our planet.
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what came about in the devonian period
Answer:
The Devonian Period occurred from 416 million to 358 million years ago. It was the fourth period of the Paleozoic Era. It was preceded by the Silurian Period and followed by the Carboniferous Period. It is often known as the “Age of Fishes,” although significant events also happened in the evolution of plants, the first insects and other animals.
Which kind of aquatic ecosystem does the photograph most likely show?
A. Marsh
B. Swamp
C. Lake
D. River
Answer:
river
Explanation:
it is smaller than the width of a lake
The correct answer is D. River
Explanation:
Rivers are one of the most common ecosystems. A river is characterized by flowing water in which biotic factors (animals, plants, bacteria, etc.) and abiotic factors (rocks, water, minerals) interact. Also, they cross major ecosystems such as forests or rainforests.
Moreover, rivers are unique because they contain fresh rather than salt water as in the ocean, and they are always flowing while in a marsh, swamp or lake the water does not flow. This suggests the ecosystem is the photograph is a river because in this the water flows and as a result of this, there is a strong current which is possible in a river but not in a lake, marsh or swamp.
Select the correct answer from each drop-down menu.
Mutations can be categorized based on the kind of effect they have on an organism. Blue eyes in humans are a result of a mutation in the OGA2 gene
which controls the production of pigment melanin in the iris
This mutation is an example of a
mutation. Such mutations have
v
effect on an organism's survival
Reset
Next
Answer:
1. neutral 2.no
Explanation:
took the test and got it right
Mutations in DNA can be categorized based on their effects on an organism. The mutation in the OCA2 gene that results in blue eyes is a neutral mutation, having neither a positive nor negative effect on survival.
Explanation:Mutations can be categorized based on the type of effect they have on an organism. A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. The example given, of blue eyes in humans, is the result of a mutation in the OCA2 gene which controls the production of pigment melanin in the iris. This mutation is an example of a neutral mutation. Neutral mutations have neither a positive nor a negative effect on an organism's survival.
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What happens when the Sun emits more energy than normal?
Answer:
it gets hotter on the surface
Explanation:
The sun emits electromagnetic energy which falls on earth in the form of radiation. The energy is emitted as rays and travels through space at the speed of light. ... When the sun emits more energy than normal, there is a little higher end of temperature experienced on the surface of earth
Answer: it’s b
Explanation:
Which of the following describes the properties of ferns?
A. They don't have vascular tissue and reproduce with spores.
B. They have vascular tissue such as xylem and phloem and reproduce with spores.
C. They have vascular tissue such as xylem and phloem and reproduce with seeds.
D. They don't have vascular tissue and reproduce with seeds
Answer: C. They have vascular tissue such as xylem and phloem and reproduce with spores.
Explanation: This is the correct answer for Pennfoster.
Answer:
The answer is C.
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. Seedless vascular plants, which include club mosses, horsetails, and ferns, have vascular tissues. These tissues allow fluids to travel through the plant. Xylem is a specialized plant tissue that carries water from the roots throughout the rest of the plant, and phloem carries nutrients and sugars. You can see these tissues in the cross-section tissues of a vascular plant shown below. Although ferns have vascular tissue, they still reproduce using spores, and not seeds, following the alternation of generations.
4. Which immune cells circulate in the body, providing immunity by producing antibodies?
Answer:
Immune System
Explanation:
Antibodies are produced by white blood cells called B cells ( B lymphocytes ) and they develop from stem cells in the bone marrow. B cells are activated when an antigen is present.
Which statement describes a way in which the digestive and excretory
systems work together?
A. The nephrons absorb nutrients from food going to the large
intestine.
B. The excretory system balances blood gases in the small intestine.
c. The intestinal villi filter blood and send wastes to the bladder.
D. The excretory system balances the salts and water obtained from
digested food
Answer:The excretory system balances the salts and water obtained from
digested food
Explanation:
Answer:
D. The excretory system removes excess salts absorbed from digested food.
Explanation:
just took the test lol
What does the formula below represent?
CO2 + H20 → C6H1206 +02
A: photosynthesis
B: ionization of glucose
C: hydrolysis of carbohydrates
D: dehydration
Answer:
The correct answer is option A: "photosynthesis".
Explanation:
Photosynthesis is the process by producers, such as plants and some bacteria, at which they produce glucose from carbon dioxide and water using sunlight as fountain of energy. Oxygen is a byproduct of photosynthesis, which is used by aerobic organisms to perform cellular respiration. The formula herein included represents the process of photosynthesis, since the combination of carbon dioxide (CO2) and water (H20), produces glucose (C6H1206) and oxygen (02).
Which of the following is the best definition of a saturated fatty acid?
A. An insoluble compound made up of glycerol and three fatty acids
B. A basic unit of a lipid that consists of single and double carbon-to-
carbon bonds
C. A basic unit of a lipid that consists of only single carbon-to-carbon
bonds
D. A compound that carries hereditary information
If research is restricted, then the new discoveries made are limited. Which
action is most likely to increase the number of discoveries scientists can
make?
Answer:
Increasing government funding of research would be the answer. hope it helps.
Most likely to increase the number of discoveries scientists can
make Eliminating government funding of research.
What is Government funding?Government funding is the backbone for new research and discoveries in any country. Without government funding, the number of discoveries and technology will decline drastically because research requires lots of money which every private organization may not able to provide.
America spends more than 2.7% of its GDP on research and development and is one of the most leading countries in a group of countries doing discoveries and inventions.
Therefore eliminating government funding of research most likely to decrease the number of discoveries scientists can make.
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Which statement best describes cancer cells?
A. They grow as a single layer of cells.
B. They cease to reproduce after 20–50 mitotic divisions.
C. They reproduce only when needed to replace missing cells.
D. They are not regulated by contact inhibition.
How are human beings and chimpanzees phylogenetically related?
Answer:
I would say that its they are descendant of a common ancestor. DNA shows that our species and chimpanzees diverged from a common ancestor species that lived between 8 and 6 million years ago.
Explanation:
The body is composed of microscopic cells that are only visible if viewed under a
a. microscope
b. telescope
c. nucleus
Answer:
A. Microscope
Explanation:
If you look at the definition of each thing that you listed, you'll be able to deduct which is the correct answer.
Microscope - an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.
Telescope - an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
Nucleus - the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Final answer:
The body is composed of cells that can only be viewed using a microscope. Special stains are used to increase the visibility of cell components under a microscope. The cell is the basic unit of life according to the unified cell theory.
Explanation:
The microscopic cells that compose the body can only be viewed using a microscope, an instrument that magnifies objects such as cells. Cells are the basic units of life and form the foundation of all living organisms. To view the individual components of cells more clearly, scientists use special techniques, such as applying special stains, which increase the contrast and allow for more detailed observation under a light microscope. Electron microscopes offer even higher magnification and resolution, providing more detailed images of cells.
The smallest unit of life is known as the cell. The unified cell theory outlines three main points: all living organisms are composed of one or more cells; the cell is the basic unit of life; and all new cells arise from pre-existing cells.
Suppose you uncovered the fossilized skull of an animal. How could you use its teeth to help determine whether it was a carnivore or a herbivore?
Answer:
The Teeth
Explanation:
Carnivores have teeth that are more for ripping and shredding a prey's flesh. They are sharper. Herbivores have more square and flat teeth for mashing leaves and grass.
To determine if a fossilized animal was a carnivore or herbivore, examine its teeth. Carnivores have sharp, pointed teeth for tearing flesh, while herbivores have flat, broad teeth for grinding plant material. These dental adaptations reflect their dietary habits.
Carnivores typically have sharp, pointed teeth designed for tearing flesh. These include canines for gripping and incisors for shearing. Their molars are often sharp, known as carnassials, which work like scissors. Examples include lions and wolves.
In contrast, herbivores possess flat, broad teeth adapted for grinding plant material. They have well-developed molars and premolars suitable for chewing, with incisors that are often used for cutting plants.
Examples include cows and horses. The differences in dental structures reflect their diets and provide insight into the ecological roles these animals played.
In a dihybrid cross for round and yellow seeds (RrYy x RrYy), what is the probability of having green and wrinkled seeds?
.
THE
Key: R = round
r = wrinkled
Y = yellow
y = green
Answer: 1/16.
Explanation:
Mendel explains the concept of dominance, laws of independent assortment and the laws of segregation by working on the plant Pisum sativum. Mendel is known as the father of genetics.
The dihybrid cross includes the two cross at a time. The round and yellow seeds has been crossed with the wrinkled and green seeds. By crossing the probability of obtaining the green and wrinkled seeds is 1/16. The sparate cross of round and wrinkled seeds, yellow and green seeds - the probability of gettting the recessive trait is 1/4. The combined probability is 1/4 × 1/4 = 1/16.
Thus, the answer is 1/16.
what is the volume of a book that has a width of 10 cm a length that is 2 times the width and a height that is half they would remember to express your answer in keeping units
Answer:
[tex]1000[/tex] cubic centimeters
Explanation:
Given -
Width of the book is equal to [tex]10[/tex] cm
Length of the book is two times the width of the book
Which means length is equal to
[tex]2 * 10\\= 20[/tex] cm
Height of the book is half of the width of the book
Which means height is equal to
[tex]0.5 * 10\\= 5[/tex] cm
Volume of the book is equal to the product of length, width and height
[tex]= 10 * 20* 5\\= 1000[/tex] cubic centimeters
The volume of the book is 1000 cm³.
Explanation:To find the volume of the book, we need to multiply the width, length, and height. The width is given as 10 cm. The length is 2 times the width, which is 20 cm. The height is half of the width, which is 5 cm.
Therefore, the volume of the book is 10 cm * 20 cm * 5 cm = 1000 cm³.
Photosynthesis is important to living organisms because
Answer:
Photosynthesis is important to living organisms because:
Provides the plant with the glucose it requires for its subsistence from the absorption of carbon dioxide, water and sunlight, which additionally produces oxygen, an essential element for living beings that acquire it through respiration.Explanation:
Photosynthesis is commonly called the process "by which plants produce their own food," however, this is not the only function of this process, since, in addition to absorbing carbon dioxide from the environment (which living beings we expel through respiration), it releases oxygen into the environment which is essential for our subsistence as it is the element that our body requires and that we acquire through respiration.
Which of the following is an example of organic matter?
An example of an organic matter is sugar, which is mostly made up of carbon, hydrogen, and oxygen.
What is an organic matter?Organic matter is the name of the matter which is commonly made up of three main components, oxygen, hydrogen, and carbon.
Sugar is an organic compound.
Thus, the correct option is C, sugar, which is mostly made up of carbon, hydrogen, and oxygen.
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