Answer:
Together,the number of protons and the number of neutrons determine an elements isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes.
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Why has the medical industry changed the procedures ?
What is an Archimedean screw used for?
1. To move things from a higher level to a lower level.
2. To change the orientation of an object.
3. To change the direction of an object.
4. To move things from a lower level to a higher level.
Answer: c
Explanation:
The Archimedean screw is to move things from a lower level to a higher level.
What is the Archimedean screw?
The Archimedean screw is one of the oldest and most usefull hydraulic machines. It is said to have been developed by Archimedes himself in ancient Greece.
The basic use of the Archimedean screw is to lift water from a lower to a higher point therefore, the use of the Archimedean screw is to move things from a lower level to a higher level.
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Elements in the same group have similar
O physical and chemical properties
mass numbers
O numbers of clectrons
O numbers of protons
Answer:
Number of protons I think.
I'm not 100% sure though I just kinda remember learning about this. Sorry if I'm wrong.
Please help :)
Describe the end result of mitosis in eukaryotes
Answer:
Two genetically identical diploid daughter cells
Explanation:
Mitosis is the process of cell division through which cells proliferate to create new cells. It allows organisms to grow and replace/repair tissues.
Before the cell divides, the diploid cell (two copies of every chromosome) duplicates its genetic material. During the stages of mitosis, the genetic material is divided between two new cells such that each cell contains a complete copy of the genetic information.
Therefore, at the end of mitosis are two genetically identical daughter cells, each with a diploid genome. Each cell is also identical to the starting cell.
An experiment was designed to investigate the effect of caffeine on the heartbeat of Daphnia magna, or water fleas. These tiny, aquatic animals are used because their transparent bodies make it easy to see their hearts and measure their heart rates. Two populations of Daphnia were raised, (A) and (B). Both populations lived in tanks of water at the same temperature and received identical amounts of food. Every 2 hours, water fleas from both populations were selected and their heartbeats were monitored. Population (A) had 0.5 g of caffeine given to them five minutes before their heartbeat was checked. Population (B) were given 0.5 g of water and with no caffeine.
Answer:
This question is incomplete. It is asking to identify the following in the experiment:
Independent variable: CAFFEINE
Dependent variable: HEARTBEAT
Experimental group: POPULATION A, which were given 0.5g of caffeine
Control group: POPULATION B, which were not given caffeine
Constants: SAME TEMPERATURE, SAME AMOUNT OF FOOD, SAME TIME BEFORE CHECKING
Explanation:
Independent variable in an experiment is the variable which is changed or manipulated by the experiment. In this experiment, the independent variable is the CAFFEINE.
Dependent variable is the variable that is measured by the experiment or in other words, the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the HEARTBEAT measured.
The experimental group of an experiment is the group that receives the experimental treatment (caffeine). In this experiment, the POPULATION A of Daphnia magna, or water fleas are the experimental group because they received 0.5g of caffeine.
On the other hand, the control group is the group that does not receive the experimental treatment. In this experiment, POPULATION B did not receive any caffeine, hence, it is the CONTROL GROUP.
Constant or controlled variable are those variables that the experimenter must keep unchanged for all groups throughout the experiment, in order not to influence the experiment's outcome. In this experiment, the constants are: SAME TEMPERATURE, SAME AMOUNT OF FOOD, SAME TIME BEFORE CHECKING (2hrs)
i’m having trouble on this anyone know what goes there?
Answer:
reactants
Explanation:
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Environmental science:
Explain how the total amount of matter is conserved during the carbon cycle?
Can someone pleaseeee help me?!
Answer:
The Law of Conservation of Matter states that matter cannot be created or destroyed. The carbon cycle is an example of the Law because the same carbon atoms are being recycled through the carbon cycle. ... Carbon is used for energy, and some is stored for growth.
at what point will the pH of the ocean start to decrease?
Draw a space filling model of water and show and describe why it is polar.
Answer:
You need to draw a water molecule but on each end put a positive and negative that is why water is polar because it is attracted to itself.
Explanation:
Please help answer 1. A. B. C. D. And E.
Answer:
A is correct
B is correct
C is lady bird
D is thrush
E is lettuce
A different jar has 100 black marbles. (The total number of marbles is unknown.) If you pull 4 marbles out and 1 is black, what is your guess for the total number of marbles?
Answer:
400 marbles
Explanation:
The total number of marbles should be 400.
Given that,
A different jar has 100 black marbles. (The total number of marbles is unknown.) If you pull 4 marbles out and 1 is black.Based on the above information, the calculation is as follows:
[tex]= 100 \times 4[/tex]
= 400
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Unlike mitosis, meiosis results in the formation of *
A. four genetically identical sperm.
B. four genetically different body cells
C. four genetically different sex cells
D. two genetically identical body cells
Answer:
C
Explanation:
mitosis does body cells while meiosis does sex cells.
Describe the difference between the retina's two photoreceptor cells.
Answer:
A cone is a visual receptor that assists individuals in processing daytime vision and color. A rod is a visual receptor that assists individuals in processing nighttime and peripheral vision.
Explanation:
. what edge said
There are two main types of photoreceptor cells of the retina -
Rod cells - Vision in poor lightCone cells - Colour vision and detailed vision in bright light.PhotoreceptorsPhotoreceptors are responsible for visual phototransduction. They convert light into biological signals.
Rod cells- contain rhodopsin that has large receptive fields and works best in dim light. They are in the outer side or peripheral area of the retina and do not distinguish color.
Cone cells - contain iodopsin, have small receptive fields and work best in high-intensity light.
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Which part of Earth is included in the hydrosphere?
Answer:
air
Explanation:
Water, surface ground and air.
Explanation:
give one example of a primary consumer in the above web
Why does the body regulate blood pH levels?
Answer:
If your blood pH levels aren't regulated then your blood will be like acid and potentially be fatal.
Explanation:
Your body tries to maintain homeostasis so regulating blood pH levels is vital.
What best describes the relationship between the two sets of reactions of photosynthesis, which are the light-dependent reactions and the light-independent reactions?
Answer:
The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.
Light-dependent reactions and light-independent reactions both produce each set of sugars, and working together they produce more sugars than they can produce separately.
What are Light-dependent and independent reactions?Light-dependent reactions which convert light energy into chemical energy, so the goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to form ATP and NADPH, while these two energy storage molecules occur which is used in light-independent reactions.
Light-dependent reactions occur in the thylakoid membrane that use light energy to make ATP and NADPH while in light-independent reactions or the Calvin cycle where electrons activated from light-dependent reactions provide energy to make carbohydrates from carbon dioxide molecules.
Thus, Light-dependent reactions and light-independent reactions both produce each set of sugars, and working together they produce more sugars than they can produce separately.
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HELP ME PLZZ I NEED HELP WITH THIS!!!!
Answer:
c. plant cells
Explanation:
tiny spaces in dead cork bark
What DNA strand is complementary for the DNA strand attgcgtatcc
Answer:
TAACGCATAGG
Explanation:
The complementary for A is T (visa versa)
The complementary for G is C (visa versa).
So we just have to put the complementary for each letter to get the complementary strand.
Hope this helps!
is Biology a science which deals about microorgansm exclusively
Answer:
false
Explanation:
biology is the study of every organisms
What is meant by "true nucleus".
it simply means the cell's DNA is surrounded by a membrane. therefore the nucleus houses the cell's DNA and directs the synthesis of the proteins and ribosomes the cellular responsible for protein synthesis.
Bromothymol blue (BTB) is a chemical indicator for carbon dioxide (CO2). In the presence of carbon dioxide (CO2), BTB turns from blue to yellow. An aquatic plant was placed into two test tubes containing BTB, and the test tubes were closed with a stopper. Then, one test tube was placed in the dark, and the other test tube was placed in direct sunlight. The test tube in sunlight stayed blue indicating no CO2 was present, while the test tube in the dark changed to yellow. Which statement best explains why the solution in the test tube placed in the dark changed to yellow?
Answer:
Explanation:
Although no options was given, the explanation below should give detail explanation.
The Chemical reactants( internal factors) for the process of photosynthesis are C02 and H20, and enzymes. Other external factors are sunlight and chlorophyll.Therefore for a plant to undergo photosynthesis these reactants must be present in the presence of sunlight.
In the present scenario the plant in the test tube exposed to sunlight must used up the C02 with water and exposed sunlight to produce O2 -the by products and CHO,Protein and Lipids in plants.
Since the C02 has metabolised,no CO2 would be present in the test tube of the plant and the water, hence BTB is negative,blue- no C02.
However,the plants in the dark lacks the supply of sunlight therefore no photosynthesis could occur.Consequentially the C02 is not metabolized,and its concentration is high in the leaf in the test tube placed in the dark.This is indicated as yellow positive by the BTB which change from Blue to yellow.
Why / how does hydrogen bonding help ice cubes float?
Answer:
First, we must understand:
What is Hydrogen Bonding?
Hydrogen Bonding is the interaction between Hydrogen atoms, with their molecules, due to the fact that their (Hydrogen atoms and bonds) are weak that even the other types of bonds are stronger.
(The other bonds are: covalent and ionic bonds)
(Hydrogen bonds are weaker than the average bonds listed above)
If you are to take how and why hydrogen bonds effect/affect ice cubes, we would have to look at how ice cube are formed. If you know, ice cubes can be created due to low temperatures (cold temperatures) making water into a solid. When ice cubes form into a sold, the spacing of the molecules become further apart, creating the density of the overall ice cube lighter than it was allowing it (ice cubes) to float.
How can scientists investigate the impact of limiting factors on a population?
Answer:
Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration.
Explanation:
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Which of the following best defines the process of the cells, tissues, organs, and organ systems all working together to maintain a stable internal environment?
Group of answer choices
A. digestion
B.homeostasis
C. excretion
D. disequilibrium
Answer:
Process of the cells, tissues, organs, and organ systems all working together to maintain a stable internal environment are best defined by the term homeostasis (option B).
Explanation:
All living organisms perform their functions properly by maintaining some conditions of the internal environment constant, such as temperature, pH and amount of water or electrolytes. This also guarantees a healthy state and a longer life.
The maintenance of the organic balance is done by an internal regulation system, called homeostasis. Homeostasis means all the processes aimed at preserving the balance and fulfilling the organic functions properly.
The other options are not correct because:
A. Digestion is the process by which nutrients are converted into small molecules that are easily absorbed by the body.
C. Excretion is the process of eliminating waste from metabolic and organic processes.
D. Disequilibrium is the term applied to the failure or loss of ideal conditions or balance.
Which of the following is the primary function of the nucleus?
Answer:
The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division. Anatomically the nucleus is made up of several components: nuclear envelope, nuclear lamina, nucleolus, chromosomes, nucleoplasm are some of these components.
Explanation:
The nucleus controls and regulates the activities of the cellular (e.g., growth and metabolism) and carries the genes and systems that include the hereditary statistics.
What are the two number one capabilities of the nucleus?The nucleus has 2 primary features: it's miles responsible for storing the cell's hereditary cloth or the DNA. it is liable for coordinating the various essential cell activities along with protein synthesis, cellular division, growth, and a bunch of other critical features.
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what are 2 types of revolutions that impacted the growth rate of the human population?
An organized group of interacting parts
1. Gene
2. Theory
3. Biosphere
4. Biodiversity
5. Microscope
6. Homeostasis
7. Species
8. Dependent
9.An experiment
10. Negative feedback
11. Independent
12. Biotechnology
13. Hypothesis
14. System
15. Evolution
Answer:
System
Explanation:
Definition of system
Which statement correctly describes the relationship between genes, proteins, and traits?
The surfaces of the leaves of many plants help to reduce water loss because they are not water-permeable. How does the biomolecule that makes up this surface differ from other biomolecules?
It is made up of long chains of fatty acids.
It is made up of polymers of monosaccharides.
It is made up of long chains of nucleotides.
It is made up of polymers of amino acids.
Answer:
The surfaces of the leaves of many plants help to reduce water loss because they are not water-permeable. How does the biomolecule that makes up this surface differ from other biomolecules? It is made up of polymers of amino acids. It is made up of long chains of fatty acids.
Explanation:
The biomolecules that make up this surface of leaves differ from other biomolecules by the fact that they are made up of long chains of fatty acids. Thus, the correct option is A.
What are Biomolecules?Biomolecules may be defined as those types of molecules that are significantly present in the body of living organisms and are required to perform essential functions like cell division, morphogenesis, or development.
The long chains of fatty acids typically consist of a hydrophobic arrangement that prevents the movement of water from one part to the other. This specific property of forming a water barrier is only present in fatty acids.
Due to this, the surfaces of the leaves of many plants help to reduce water loss because they are not water-permeable, which means to prevent the migration of water.
Therefore, the correct option for this question is A.
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