Answer:
Lens
Explanation:
The area of the retina on which the light rays focus is the fovea, which is a small, central pit located in the retina that is responsible for vision, and there are rod and cone cells present in the human eye too.
What is the significance of the eyes?There are several types of eyes present in the ecosystem, such as eye patterns, and the composition of the human eye is different from that of the dog and the cow, but this is the organ of vision, which allows the individual to see the world for nutrition, predation, navigation, communication, etc. Apart from that, it provides visual information about the shape, size, and color of objects and is involved in many other functions, such as the sleep-wake cycle,
Hence, the area of the retina on which the light rays focus is the fovea, which is a small, central pit located in the retina that is responsible for vision, and there are rod and cone cells present in the human eye too.
Learn more about the significance of the eyes here.
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Single cells are also known as unicellular organisms. ... They can live and carry out all of their life processes as one single cell.
Answer:
true
Explanation:
they do all things by one cell reproduction feeding etc
the exchange of gases within the cells of the body is known as
Explanation:
The exchange of gases between the blood and tissue cells is internal respiration. Finally, the cells utilize the oxygen for their specific activities: this is called cellular metabolism, or cellular respiration. Together, these activities constitute respiration.
HURRY PLEASE!!
Which is not a part of the cell theory? *
Cells divide into cells
Cells are not living things
All organisms are made up of one or more cells
Cells are the basic unit of structure and organization of living organisms
Answer:
Cella are not living things
Explanation:
Cells are living things.
Answer:
Cells are not living things
Explanation:
The other three are true, however cells are living things so it is false.
Hopefully this helps!
Brainliest please?
How does bromothymol blue act as an indicator for carbon dioxide? What evidence do you have to support your conclusion?
Answer:
Carbon dioxide production can be measured by breathing through a straw into a solution of bromothymol blue (BTB).
Explanation:
BTB is an acid indicator; when it reacts with acid it turns from blue to yellow. The more carbon dioxide you breathe into the BTB solution, the faster it will change color to yellow.
What are the effects for using gold in our industry?
Answer:Modern industrial gold mining destroys landscapes and creates huge amounts of toxic waste. Due to the use of dirty practices such as open pit mining and cyanide heap leaching, mining companies generate about 20 tons of toxic waste for every 0.333-ounce gold ring.
Explanation:
1. a) Students are trying to decide which is better for the environment: glass bottles or aluminum cans. They intend to use a formal method of investigation to determine which container is better. They are going to make a list of pros and cons for using each type of container but first need to do some research. The students need to find out things like how much matter and energy are used to make the bottles and cans.
b) How do you know the students in the above study are acting as scientists? (1 point)
Answer:
because they are helping the envioment and developing experiments
Explanation:
The volume (V) of a cylinder can be determined by using the formula
V = ar?h,
where r = the radius of the base, and h = the height of the cylinder. What is the result
of solving this equation for r?
Answer:
Explanation:
To solve for r, simply means to isolate the variable:
[tex]V = pi*r^2*h\\[/tex]
The inverse of multiplication is division, so divide both sides by pi and h
[tex]\frac{V}{pi*h} = r^2[/tex]
[tex]r = \sqrt\frac{V}{pi*h}[/tex]
what is metaphase and what does it do?
Answer:
Metaphase is the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to spindle fibers. A metaphase separates duplicated genetic material that is carried in the nucleus of a parent cell and then converts it into two identical daughter cells.
Answer:
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell. As metaphase continues, the cells partition into the two daughter cells.
¿Cuáles son los factores biológicos o vivos que afectan a un ecosistema?
Answer:
true
it have later than 1234567
Answer:
Translate
Explanation:
2. What is the difference between parasitic roots and mycorrhizae?
Answer:
the main difference between the paasitic roots and mycorrhizae is that the parasitic roots are adventious roots of parasitic plants penetrating into the conducting tissue of the host plant whereas mycorrhizae r the association's between fungi and higher plants
What is the charge for all of the elements in Group 1?
A team of engineers is asked to evaluate several different design solutions. Which action is most likely to help them with their evaluations? A. Asking detailed questions about the criteria and constraints B. Deciding which design solution is least costly without considering the criteria C. Changing the constraints to match the design solution they like the most D. Asking who developed the project's criteria and constraints
Answer:D
Explanation:Asking who developed the project's criteria and constraints
Answer: asking detailed questions
Explanation:
An Object at Rest video and explain
how it relates to the rock cycle and provide examples
Answer:
Explanation:
XD
what are the malleable and ductile properties of metal
Answer: The malleable properties are properties that affect its ability to be harmed, pressed, or rolled into thin sheets without breaking. It is the property of a metal to deform under compression and take on a new shape. The ductile properties is the ablity to be hammered thin or stretched into wire without breaking.
Explanation: Found on Thoughtco.com
PLEASE HELP RIGHT NOW ASAP!!!!! 100 POINTS TO WHOEVER ANSWERS CORRECTLY!!!!!! :)
A group of students prepared a table listing the types of reproduction that occur in several organisms. Based on this information, which of the organisms can produce offspring that are genetically identical to the parent organism? Explain your reasoning.
ANSWER: cats and frogs
How hydrogen and oxygen atoms react with each other to form a compound
which step of cellular respiration produces the most atp
Answer: electron transport chain
how would you modify the hypothesis and repeat the experiment for improved or more complete results
Answer:
you could try to do another experiment that would be the obvious and the simple solution.
Critical Thinking When lipid is added to a solution of a detergent in water, the detergent breaks
up large globules of the lipid into much smaller globules. What effect do you think a detergent would
have on the integrity of cells? Explain your answer.
Answer: The cell would break apart.
Explanation:
Because Detergent breaks apart lipids, it would destroy the phospholipid bilayer, causing the whole cell to fall apart.
Hydrogen pumps move hydrogen ions into which structure?
O A. The thylakoid
O B. The mitochondrion
O C. The cytosol
D. The stroma
Answer:
a
Explanation:
i
when does crossing over occur? how many chromatids are involved? how many homologous chromosomes?
Answer:
The normal human karyotype is made up of 46 chromosomes: ... The 2 sister chromatids are linked mainly by a paracentric heterochromatin ...
Explanation:
The light-dependent reaction should happen before the Calvin cycle because ________.
Select one:
a. its products are important to the fixation of carbon dioxide.
b. plants are more active during the day than at night.
c. photosynthesis happens faster when there is sunlight.
d. more products are produced during the day than at night.
In which organelle would the above events most likely occur?
A. Chloroplast
B. Mitochondria
C. Nucleus
D. Ribosome
PLS HELP!!
Answer:
Mitochondria
Explanation:
The organelle in which the above events most likely occur is known as the Chloroplast. Thus, the correct option for this question is A.
What is an Organelle?An organelle may be defined as a type of tiny organ or a subcellular structure that has significantly one or more specific functions in order to perform in the cell which is essential for the survival of living organisms.
The events that are demonstrated in the picture are known as the light reaction and dark reaction of photosynthesis. The light reaction of photosynthesis occurs in the thylakoid membrane of the chloroplast while the dark reaction of photosynthesis occurs in the stroma of the chloroplast.
Therefore, the chloroplast is an organelle in which the above events most likely occur. Thus, the correct option for this question is A.
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Design a controlled experiment to determine the effect of hot, dry air on head lice. In your experimental design, be sure to:
• state the hypothesis to be tested in the experiment [1]
• state one way the control group will be treated differently from the experimental group [1]
• state one result of the experiment that would support the hypothesis [1]
An experiment is carried out to answer a question. The hypothesis predicts what is expected to occur. Experimental and control groups are compared to analyze the results, supporting or not the hypothesis.
-----------------------------------------
BACKGROUND
When people are infested with head lice, it is recommended to wash their cloth and dry it with hot air over 53 or 54ºC for 5-30 minutes.
Head lice and eggs seem to die when exposed to those conditions by getting dehydrated.
SITUATION
We will assume that we work in a primary school and that students from the 3rth grade are being affected by this parasite.
We want to know if applying hot air to these students before entering the class will make a difference and help to control this problem.
So, we will propose an experiment to answer this question.
HYPOTHESIS
A hypothesis is a conjecture. A researcher hypothesizes to predict what is going on or what is expected to occur. The hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.
Hypothesis ⇒ Applying hot air to students' heads kills the head lice that students are carrying.
To evaluate the effect of hot air, we need to keep control of as many other variables as possible.
To do so, we asked students' families not to use other treatments on students' heads and to bathe them daily.
In this way, we were sure that all students
were equally affected by the parasite, took showers every day, and neither was using any other product that could affect the results.Our population was the 3rth grade students ⇒ 64 children ⇒ 30 girls + 34 boys.
Before the experiment, we separated the 3rth grade into two groups.
Group A ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Experimental groupGroup B ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Control group
→ Treatment
Each student from group A received hot air every day for one week before entering the class.
Hot air was 53ºC and was applied for 5 minutes.
→ Control
Each student from group B did not receive the treatment for one week before entering the class.
CONTROL GROUP
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
Individuals of the control group are selected from the same population as the treatment group.
*** These two groups are identical in all aspects except for the independent variable, which changes in the treatment group but remains constant in the control group. ***
The control group is Group B. The only difference between the control and the experimental group is that the first one did not receive the treatment. Every other aspect was equal for both groups.
The only way the control group was treated differently from the experimental group was that the control group did not received the treatment, while the experimental group did.
RESULTS
After one week, groups were compared to see if the hot air was effective in killing head lice.
When comparing the control and the experimental group, we could see that students from group A were free of parasites.
Students from group B were still affected by the head lice.
CONCLUSION
The results support the hypothesis. Hot air turned to be a great treatment for lice control.
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What is happening to the chromosomes in this phase of mitosis?
Answer: The answer is A
During mitosis (nuclear division), the chromosomes condense, the nuclear envelope of most cells breaks down, the cytoskeleton reorganizes to form the mitotic spindle, and the chromosomes move to opposite poles. Chromosome segregation is then usually followed by cell division (cytokinesis).
Can anyone please this? ASAP
Select the statement that is true.
A. DNA has the sugar deoxyribose, while RNA has the sugar ribose
B. Thymine is only present in DNA, while cytosine is only present in RNA
C. DNA and RNA are both double-stranded
D. Translation copies DNA to mRNA, while transcription coverts mRNA into proteins
Answer:
C. DNA and RNA are both double-stranded
Explanation:
This is the only one that is true.
hazards to humans that come into contact with it,
4. Study the graphs in the stimulus. Order the events that occurred at the Bodega Bay study
site, where scientists used traps to catch and count samples of marine organisms, from
1to 5. Write a 1 by the first event to occur and a 5 by the last event.
5 The number of native clams per sample falls from 100 to 10.
1 Scientists find European Green Crabs in Bodega Bay.
4 Scientists find that the number of native clams per sample has risen to 40.
3 The number of native shore crabs per sample falls from 25 to 20.
2 The number of European Green Crabs per sample falls from 5 to 4.
what kind of enzyme adds a phosphate group to another protein?
Answer:
kinase
Explanation:
is the correct answer
Which one of the following traits is nota characteristic of living things?A.Needs energyB.Responds to environmentC.Comes from nonliving matterD.Reproduces
Answer:
C.
Explanation:
If they came from nonliving things, they would not be able to live in the first place