Answer:
well long ago humans used to wear animal skins and now we just wear clothes out of cloth,cotton and stuff
List 2 other elements that will react the same way in a chemical reaction as potassium (K).
ASAP!!!!!!!!! THANK YOU SO MUCH !!!!
Rubidium is a soft, white metal that reacts with water similarly to sodium and potassium, but the reaction is much more violently exothermic.
What is a chemical reaction?When one or more chemicals are converted into one or more other chemicals, a chemical reaction occurs.
A chemical reaction is a practice that reverts one or even more substances, renowned as reactants, to one or even more various compounds, widely recognized as products.
Chemical elements or compounds are examples of substances.
Living things (cells, animals, humans, and insects) use chemical reactions to grow, develop, reproduce, and adapt.
Combination, decomposition, single-replacement, double-replacement, and combustion are the five basic types of chemical reactions.
Analyzing the reactants and products of a specific reaction will allow you to categorize it.
Rubidium is basically a soft, white metal that reacts with water in the same way that sodium as well as potassium do, but the reaction is much more exothermic.
Thus, rubidium and sodium are the two other elements that react the same way in a chemical reaction as potassium.
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QUESTION 1
What percentage of infectious HBV carriers are asymptomatic?
A. 100%
B. 20%
C. 50%
D. 30%
Answer:
Symptomatology and transmission
The clinical manifestations of acute HBV infection are age dependent. Infants, young children (younger than 10 years of age), and immunosuppressed adults with newly acquired HBV infection are usually asymptomatic. [2] Older children and adults are symptomatic in 30%–50% of infections
Gametes, which are sex cells, carry the alleles. Why must a gamete carry one allele (represented by a letter) from each gene? Meaning, why can’t a gamete carry an “hh” instead of an “hs” or an “Hh” instead of a “HS?”
Answer:
Due to the law of independent assortment
Explanation:
In diploid species like humans, all somatic (body) cells have two complete sets of chromosomes, one chromosome inherited from the maternal gamete and one chromosome inherited from the paternal gamete. Each one of the homologous chromosomes contains one copy of each gene, or allele, such that one allele is inherited from each parent. According to the law of independent assortment, maternal and paternal chromosomes are independently assorted during meiosis, which means that different genes localized on different chromosomes are randomly distributed into gametes. In consequence, alleles of different genes are transmitted from parents to offspring independently of one another.
What are the four body parts that a flatworm has?
During which step of the cell cycle does a cell get a signal to begin cell division?
Answer:
Prophase
Explanation:
Prophase is not only the first step of Mitosis and Meiosis (I and II), but it is crucial because it helps the chromatin become chromosomes, this is after Interphase where DNA replication occurs this is the signal that starts the dividing process. This phase also helps with condensing the chromosomes which acts as another signal to division because the chromosomes are prepared to be separated from one another. Spindle fibers (microtubules) are also created to get ready for separation. Now that these main things happened during Prophase, it signifies the rest of the cell and the other phases occur.
Hope this helped :)
what is blood transfusion why should we donate the blood
Answer:
To keep blood safe, blood banks carefully screen donated blood. The risk of catching a virus from a blood transfusion is low. Sometimes it is possible to have a transfusion of your own blood. During surgery, you may need a blood transfusion because of blood loss.
hope this helps!!:)
Explanation:
( PLEASE HELPPPP) I GIVE BRAINLIEST
When an electric light is turned on, the amount of light energy released by the lightbulb is less than the amount of electrical energy going into the lightbulb. Which statement best explains this?
Question 4 options:
Some of the electrical energy is destroyed.
Some of the electrical energy is changed into heat energy.
Some of the electrical energy stays in the wire.
All of the electrical energy is destroyed.
Answer:
Some of the electrical energy is destroyed.
Explanation:
some of the electrical energy is destroyed because If the excess energy goes beyond the tolerance of the devices, they will overheat and/or burn (cause damage). ... If there is no interest in saving the extra energy, it can be "dumped" into an appropriate load and converted to heat.
When a lightbulb burns out, then that is when all of the electrical energy got desroyed, and that is why it happens over time
The statement that best explains this is some electrical energy is destroyed. The correct option is A.
What is electrical energy?Electrical energy is kinetic energy generated by moving electric charges. The amount of energy relies on the charge's speed; the faster it moves, the more electrical energy it carries.
Some electrical energy is destroyed because if the extra energy exceeds the devices' tolerance, they will overheat and/or burn (causing damage). If there is no desire to save the excess energy, it can be “dumped” onto a suitable load and transformed into heat.
When a lightbulb burns out, all of the electrical energy is destroyed, which is why it happens over time.
Therefore, the correct option is A. Some electrical energy is destroyed.
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ASAPP!!!!
Astronomers often compare the colors of stars. Knowing the color of a star is most useful in determining
-the size of the star.
-the temperature of the star.
-the distance of the star to Earth.
-the number of planets orbiting the star.
Answer:
yes yes
Explanation:
Do you think the northwest or the northeast United States receives more precipitation throughout the year? Justify your answer.
Answer:
Explanation: the northwest recieve more preciptation throught the year
Hope it helps :D
What is uniformitarianism? Give 4 examples.
Answer:
Good examples are the reshaping of a coastline by a tsunami, deposition of mud by a flooding river, the devastation wrought by a volcanic explosion, or a mass extinction caused by an asteroid impact. The modern view of uniformitarianism incorporates both rates of geologic processes.
Explanation:
the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.
Uniformitarianism, also known as the Doctrine of Uniformity or the Uniformitarian Principle, is the assumption that the same natural laws and processes that operate in our present-day scientific observations have always operated in the universe in the past and apply everywhere in the universe
What is a marine ecosystem?
Answer:Marine ecosystems are the largest of Earth's aquatic ecosystems and are distinguished by waters that have a high salt content. These systems contrast with freshwater ecosystems, which have a lower salt content.
Explanation:
s
Answer:e a marine ecosystem is the life underwater like sea creaters ,a weed etc s
Explanation:
online defnation : Marine ecosystems are characterized by the biological community of organisms that they are associated with and their physical environment.
heres a fact Some important characteristics of the marine ecosystem are: They make up 70% of the earth’s surface. They dissolve the salts in their own waters. Supplies food for humans and generates socioeconomic benefits. They fall into the category of aquatic ecosystems
ANSWER THE 4 QUESTIONS FOR BRAINLIEST AND 10 POINTS
1. The sun's position changes,because the Earth turns on its axis,which causes the sunlight to hit at different angles. This means that after a period of time,the sun no longer shines on one side. It will be dark/night on one side and light/day on the other side.
2.Shadows change,because the angle that the light hits us is different overtime.
3.The flagpole will look the same from when it started at the exact time.
4.Overtime our shadows become small and you may not be able to see it. That is mostly for small objects.You can see the but for small and certain angles.
Hope that this helps. This took a long time I would appreciate a Brainliest.Enjoy.-From Nea.
WILL GIVE BRAINLIST FOR CORRECT ANSWERS
Answer:
wave b
Explanation:
Science Project :
Teacher bent over and asked what can I fit. What can I fit?
How does energy move through living systems?
A. Energy can be created by organisms and can be passed on if it is not used by that organism
B. All of the energy is used up by organisms as they move, grow and reproduce so less energy is available for the next organism in the food chain
C. Energy is transformed and/or lost as heat as it passes from one organism to the next, but the total amount always stays the same
D. Energy is created during photosynthesis
Answer:energy is produced during photosynthesis. energy is used by the photosynthesiser or lost as heat, with the remainder available to the next organism in the food chain.
Explanation: self explanatory
What is the “x” shaped product of DNA replication called?
A.parent cell
B.cytokinesis
C.chromosome
D.nuclear membrane
Answer:
chromosome
Explanation:
Answer:c
Explanation:
PLEASE HELP
Which of these is likely to be true about a scientific theory? (5 points)
a
It can never be changed or replaced.
b
It is supported by exactly one true hypothesis.
c
It is accepted by a large scientific community.
d
It is a random guess about how something happened.
Question 2 (5 points)
(04.02 MC)
Read the two statements given below.
Statement 1: All living matter at the smallest level is made of cells
Statement 2: New animal cells are formed from pre-existing animals
Which of the following best relates the statement to the correct type of theory? (5 points)
a
Both statements are about scientific theories.
b
Both statements are about everyday life theories.
c
Statement 1 is about an everyday life theory, and statement 2 is about a scientific theory.
d
Statement 1 is about a scientific theory, and statement 2 is about an everyday life theory.
Question 3 (5 points)
(04.03 LC)
Which organelle captures sunlight and helps in food synthesis? (5 points)
a
Chloroplast
b
Mitochondrion
c
Nucleus
d
Ribosome
Question 4 (5 points)
(04.01 LC)
Which type of molecule forms structures in cells and stores energy? (5 points)
a
Lipid
b
Nucleic acid
c
Protein
d
Water
Question 5 (5 points)
(04.03 LC)
The diagram below shows the structure of an animal cell.
The image of an animal cell is shown with some organelles labeled numerically from 1 to 6. The outer double layer boundary of the cell is labeled 1. A stacked disc like structure is labeled 2. A broad rod shaped structure with an irregular shape inside it is labeled 3. The entire plain section that forms the background of the cell and is within the outer boundary is labeled 4. A small circular shape within the large circular shape is labeled 5. The large central circular shape is labeled 6.
Which number label represents the nucleus? (5 points)
a
6
b
5
c
3
d
2
Question 6 (5 points)
(04.01 LC)
Which of these is a group of organs that work together and perform one or more major functions? (5 points)
a
Organelle
b
Organ system
c
Molecule
d
Tissue
Question 7 (5 points)
(04.02 LC)
Matthias Schleidan observed plant leaves under a microscope. How did this help contribute to cell theory? (5 points)
a
It helped to show that all plants are made of cells.
b
It helped to show that all plants are made of chloroplast.
c
It helped to show that plant cells can be created from soil.
d
It helped to show that plants cells cannot function independently.
Question 8 (5 points)
(04.02 LC)
Based on the cell theory, which of the following is true? (5 points)
a
All cells perform the same function.
b
All cells are of the same size and shape.
c
Organisms can have only one or many cells.
d
Cells vary in size depending on the size of the organism.
Question 9 (5 points)
(04.01 LC)
Which of the following levels is lower than cells in the hierarchy of organization of living things? (5 points)
a
Molecules
b
Organs
c
Organ systems
d
Tissues
Question 10 (5 points)
(04.03 MC)
What will most likely happen in the absence of a cell membrane? (5 points)
a
Photosynthesis will not take place.
b
The cell will not store food, water, nutrients, and waste.
c
Energy will not be released during cellular respiration.
d
Substances will pass in and out of the cell in an uncontrolled manner.
Question 11 (5 points)
(04.03 MC)
Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below.
Cell C: Has a cell membrane
Cell D: Has a large vacuole
Which statement about the two cells is correct? (5 points)
a
Both cells are animal cells.
b
Cell C can be a plant cell or an animal cell.
c
Cell D can be a plant cell or an animal cell.
d
Cell C is a plant cell and Cell D is an animal cell.
Question 12 (5 points)
(04.02 MC)
A scientist observed the formation of hundreds of maggots and many flies on a rotting meat slice exposed to the environment. What most likely formed the maggots? (5 points)
a
Water vapor present in the surrounding air
b
Eggs of flies in the surroundings
c
Nutrient crystals in the meat
d
Oxygen in the environment
Answer:
Q1. b Q2. a Q3. a Q4. a Q6. b Q7. a Q8. c Q9. a Q10. b Q11. b Q12. b
Please attach the photo of question 5 so that it is easier to answer.
Explanation:
Answer: I need the answer to give please help here is a photo
This person's job is to ensure tat the trial is fair.
Answer:
judge?
Explanation:
Explain the value of echinoderms .
Answer:
Echinoderms play numerous ecological roles. Sand dollars and sea cucumbers burrow into the sand, providing more oxygen at greater depths of the sea floor. This allows more organisms to live there.
Explanation:
They are also economically important to humans due to their use in scientific research and education and also for food.
Answer:
Echinoderms play numerous ecological roles.
Which climate zone would the location on this map be at 40 N and 60N?Hint:ohio is in the zone
Answer:
Zone 2
Explanation:
took the test ohio is in zone 2 and that is how i came to that conclusion.
The climate zone would location on this map is 40 N and 60N is the tropical zone. The correct option is zone 3.
What is a tropical zone?The tropics are areas of the Earth that are roughly in the center of the globe. The tropics lie between the latitude lines of the Tropics of Cancer and Capricorn.
The Equator and sections of North America, South America, Africa, Asia, and Australia are included in the tropics. The earth is divided into parts according to its conditions.
The tropic is an area of the Earth located around the equator and between the Tropics of Cancer in the Northern Hemisphere and the Tropics of Capricorn in the Southern Hemisphere. This area is also known as the tropical zone and the torrid zone.
Therefore, the correct option is 3, tropical zone.
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What type of mutation causes a change in what amino acid the DNA strand
codes for?
Silent
Non Silent
Answer:
Non Silent
Explanation:
Mutation, is generally, any change or alteration to the genetic sequence of a DNA. However, mutation can be of different types depending on how it occurs. According to this question, a mutation is said to be SILENT if it involves the substitution of a nucleotide with another nucleotide that does not change the protein molecule encoded by the gene. In other words, the mutation happens in such a way that both the original sequence of gene and the mutated one codes for the same amino acid sequence (protein).
On the other hand, a mutation is NON SILENT i.e missense or nonsense mutations, if the mutation causes a change in what amino acid the DNA strand codes for. For example, in missense mutation, a different amino acid is produced while in nonsense mutation, a STOP codon is produced.
Photosynthesis is important for almost all life on Earth because it
Answer: Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere
Explanation: Your welcome broski, fly high :)
Water vapor GAINS energy when it CONDENSES into a liquid.
A. True
B. False
Answer:
Explanation:
B. False it loses energy in the form of heat. Therefore, this process is exothermic.
When the earth and moon are lined up,the tides are______than normal?
Answer:
Greater
Explanation:
When the Sun and Moon are lined up (at new moon or full moon), the tides produced reinforce each other and are more significant than average (Figure 4). These are called spring tides (the name is connected not to the season but to the idea that higher waves “spring up”).
Answer:
The tides are higher than normal!
Explanation:
If the carrying capacity of the pond is 1,500 for this species, what is the expected population size after one year
Answer:
450
Explanation:
A fish population of 250 in a pond has a maximum annual rate of increase of 0.8. If the carrying capacity of the pond is 1,500 for this species, what is the expected population size after one year?
The annual rate of increase in the population is 0.8 and the population is currently 250 in the pond, hence, the expected population size after one year can be calculated as thus:
Expected increase in the population = 0.8 x 250
= 200
Expected population size after one year = 250 + 200
= 450
Since a population of 450 has not exceeded the carrying capacity of the pond, the expected population size after one year is, therefore, 450.
The expected population size after one year is 450
Data obtained from the question•Current population = 250
•Annual rate of increase = 0.8
•Expected population size =?
Determination of the expected increaseWe'll begin by calculating the expected increase in the pond. This can be obtained as follow:
•Current population = 250
•Rate of increase = 0.8
•Expected increase =?
Expected increase = Current population × rate
Expected increase = 250 × 0.8
Expected increase = 200
Determination of the Expected population size•Current population = 250
•Expected increase = 200
•Expected population size =?
Expected population size = Current population + Expected increase
Expected population size = 250 + 200
Expected population size = 450
Complete question:
A fish population of 250 in a pond has a maximum annual rate of increase of 0.8. If the carrying capacity of the pond is 1,500 for this species, what is the expected population size after one year?
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Why do the plant cells in these two images have different structures?
A. Because every plant cell has a different structure
B. Because they are in different stages of development
C. Because they have different jobs, or functions
D. Because the DNA in their nuclei are very different
Answer:
C
Cells have different shapes because they do different things. ... The shapes of cells have evolved to help them carry out their specific function in the body, so looking at a cell's shape can give clues about what it does. Neurons are cells in the brain and nervous system.
The plant cell in the images have different structures because they have different jobs, or functions
Why are all plant cells have different structures?All plants are very different because of their environments.
Plant cells are different in shapes because they are in different places in the plant and do different jobs. Some cell stores food,some perform photosynthesis etc.- Animal cells also have many shapes like nerve cells, germ cells etc.According to options:-
A. Because every plant cell has a different structureB. Because they are in different stages of developmentC. Because they have different jobs, or functionsD. Because the DNA in their nuclei are very differentThe answer will be (option A) they have different jobs, or finctions.
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Can glucose be directly used for energy
pick 4 simple machines and explain how they are used in your everyday life
Answer:
1. Cars
Because they help me and my family get places
2. Phones
Because I think that they also help my getting u places and just for entianment or school
3. Computers
They help with school as well
4. TVs
They help with the news
Explanation:
Which is a chemical property of ethanol?
A. boiling point
B. density
C. flammability
D. melting point
Answer:
C
Explanation:
We know that ethanol is flammable
During photosynthesis,__________ is used to break water down into oxygen and hydrogen.
Answer:
Sunlight energy
During Photosynthesis, Sunlight energy is used to break water down into oxygen and hydrogen.