Guys pls help me!
Students investigate how onion cells react to salt (NaCl) solutions of different concentrations. They observe onion cells in three salt solutions under a microscope
The image of an onion cell in a 3% salt solution is shown.
Onion Cell in 3% Salt Solution
Answer:
I'm not sure but maybe for the first it's less than 3% and for the second it's equal to 3%?
Explanation:
C. Read the hypotheses below, and identify the
independent (what you
manipulate/change) and dependent variables (what you measure). Write
them by putting a comma in between in the space provided
12. If hatching brine shrimp is related to salinity (how salty the water is),
then the greater the salt concentration, the higher the hatching rate.
Nour answer
Answer:
Independent variable: Salinity/Salt concentration
Dependent variable: hatching rate
Explanation:
As rightly stated in this question, INDEPENDENT VARIABLE, in an experiment, is the variable that the experimenter changes or manipulates in order to bring about a measurable response while the DEPENDENT VARIABLE is the variable that the experimenter measures in an experiment. Dependent variable as the name implies is dependent on the independent variable.
In this question where an hypothesis was given as follows: "Hatching brine shrimp is related to salinity (how salty the water is), then the greater the salt concentration, the higher the hatching rate". The hypothesis relates the independent and dependent variables i.e. it tells us how the independent variable affects the dependent variable.
Hence, according to the hypothesis, it is telling us how a change in SALINITY OR SALT CONCENTRATION will affect HATCHING RATE. Therefore;
Independent variable: SALINITY/SALT CONCENTRATION
Dependent variable: HATCHING RATE
EASY!!!!4. Select all that are Non-metals
Magnesium
Phosphorous
Fluorine
Copper
Potassium
lodine
Gold
Answer:
Phosphorus
Fluorine
Iodine
Helppppo me friends
Answer:
Given V=IR
Explanation:
8Volts=I8Ohms
=1 ampere
Which of these describes an amphiarthrosis joint?
A joint in the elbow that permits movement in one plane.
A joint in the ankle that allows rotational movement.
A joint at the base of the skull that permits flexion and extension of the neck.
A joint in the spine that is slightly movable and separated by cartilage.
Answer:
D. A joint in the spine that is slightly movable and separated by cartilage.
Explanation:
got it from edge2020
Answer: A joint in the spine that is slightly movable and separated by cartilage.
Explanation:
Which event is an example of vaporization?
A. A spilled drop of rubbing a slowly disappears.
B. People see their breath on alcohol cold winter day.
C. Dew forms on the leaves of a tree.
D. Fog forms in a valley.
Answer:
A. A spilled drop of rubbing a slowly disappears.
Explanation:
Make a prediction of this: A group of scientists recently proposed the idea that beets should replace salt for melting winter ice. The scientists pointed out that because beets grow underground, they continue to grow in freezing conditions. Thus, they hypothesized, an extract of beet roots could melt ice on roads in winter. To test this hypothesis, the scientists froze equal volumes of water on two separate plates. They spread an extract of beet roots on one plate of ice and sprinkled an equal amount of salt over the other plate. After keeping both plates at 0°C (the temperature at which water freezes) for a period of time, they measured the amount of melted water on each plate. Their results showed that the plate treated with beet extract contained more liquid water than the plate treated with salt.
Answer:
extract of beet roots could be used as antifreeze for water systems
Explanation:
In science, a prediction can be defined as a plausible conjecture that is subsequently proved (or rejected) using the scientific method. In other words, a prediction is the expected result obtained if the hypothesis is true. Scientists make predictions based on falsifiable hypotheses which can be tested through experimental and/or observational procedures. In this case, it could be predicted that the extract of beet roots could be used as anti-freeze for water systems in cold climates.
How does biology differ from other scientific fields like astronomy or geology?
Explanation:
Biology is the study of human, animal, and plant life. Astronomy is the study of space. Geology is the study of rocks.
Answer:
Biology is th study of living things while astronomy and geology don’t study living things.
Select the correct answer from each drop-down menu. Gravity affects the _____ of an object but not its _____
DNA and RNA are both important nucleic acids. They have similarities and differences structurally.
Use the Venn diagram to compare the two nucleic acids. Drag each characteristic to the correct location.
ITEM BANK Move to Bottom
Deoxyribose sugar
Double stranded
Ribose sugar
Sugar, phosphate, nitrogen base
Throughout the cell
DNA
Both
RNA
Answer:
search this up
Explanation:
then add quiz let at the end :) hope this
A lot of your personality comes from ______________________ rather than your DNA.
Answer:
Inheritance
Explanation:
Many believe that personality traits can come from how you are treated when you are a child while that can play a part in a personality trait that's not the full truth. Personality traits are inherited from your parents so if your father is stubborn but not your mother there's a 50% chance that the child may be stubborn like his or her father.
Hope this helps.
8. Passive transport needs ATP.
True
False
Answer:
The answer is false
Explanation:
Measuring Populations (brainliest)
What substances are combined with sunlight in the process of photosynthesis?
A. carbon dioxide and water
B. water and simple sugar
C. carbon dioxide and oxygen
D. oxygen and simple sugar
Answer:
A. carbon dioxide and water
A scientist claims that he has protected animal test subjects from a newly mutated virus using an experimental vaccine.The experimental vaccine was injected into five animal test subjects. The scientist also injected a placebo vaccine into five other animal test subjects.One month later, all of the test subjects were exposed to the mutated virus. The subjects that received the vaccination showed no sign of the disease and blood tests confirmed the presence of antibodies against the disease, but the subjects given the placebo developed symptoms of this condition.Why did one group have a placebo injected before being exposed to the virus?A) They were part of the experimental groupB) They would be protected from the diseaseC) They would be exposed to a weaker form of the virusD) They were part of the control group
Answer:
The correct answer is option D. they were part of the control group.
Explanation:
A control group is a group of subjects different from the other test subject as they did not get the independent variable's effect on them and separated from the rest of the experiment. This group of subjects is used to rule out any other explanation of the effect of the independent variable.
In this experiment, subjects that received a placebo injection are the control group as they did not expose to the mutated virus and there are the presence of antibodies in the blood.
What do you think would happen if a trial of the experiment was done with frozen liver and potato?
They would react the same as the control.
They would react the same as the heated samples.
They would react the same as with the vinegar and hydrogen peroxide at room temperature.
They would react the same as with just the hydrogen peroxide.
Explanation:
They would react the same as with the vinegar and hydrogen peroxide at room temperature. They would react the same as with just the hydrogen peroxide.
Describe adaptations in the circulatory and neurosensory systems of cephalopods that are particularly valuable for actively swimming, predaceous animals.
Answer:
yo no se mijo habla espanol
What is the process depicted in this figure and why is it important?
Answer:
The correct answer is - antigenic shift due to mutation.
Explanation:
In this image, there is a representation of the antigenic shift or change takes place to evolve to a new strain of influenza virus from the original virus that has a different antigen on the surface of the virus than the new strain. In this image it is shown that the surface H antigens went through a shift to form a new strain while N antigen remain the same.
This is important to adapt and evolve according the internal environment of the host show this type of mutation requires if moving from one host to another (human to pigs).
GUYS HELP FAST I GOT 3 minutes
Answer:
what do you zxvbnbvcxcv
Explanation:
What does latent mean?
Group of answer choices
Something that cannot be seen easily.
Small, but traceable evidence
Larger evidence
Evidence that has to be submitted in person.
what are the similarities between cats and lion
Answer: eating D I C K
Explanation:
they lick it
In pedigree B, how can unaffected parents have an affected child?
Answer:
The unaffected mother, who is marrying in, does not carry an allele for the disease; so the affected child inherits an allele only from the affected father. No child could be affected by a single autosomal recessive allele, or X-linked recessive allele, so the trait is dominant
Answer:
The childs mother could be a carrier without knowing it which would create the couple to have a child thats affected.
Explanation:
The physical and chemical properties of elements change in predictable ways from one end of a period to another. Which of the following is true based on this feature of periodic table (p 312)?
Group of answer choices:
A : Potassium has more protons than Calcium
B : An atom of gold is smaller (atomic size) than an atom of platinum
C:The noble gases react with everything
D: Elements in Group 8 are more reactive than elements in Group 7
PLEASE AANYONE THIS IS MY LAST QUESTION ILL MARK BRAINLEST PLEASE!
Answer:
Are those your breast?
Explanation:
why this site
Help with these two please
when a racher puts cattle in a pasture, what happens to the amount of grass in it?
Answer: Cows put in a pasture of fresh grass will eat it down too a point it would regrow fast.. Unless the pasture is not large enough for the number of cattle. Then they will eat it into the ground and kill it.
Explanation:
What are the greatest threats to biodiversity?
PLEASE HELP DUE BY 8:30 tomorrow
Answer:
increasing
Explanation:
the sun is not bad for plants. In fact, it makes them grow. Its like without no food.
Select the correct answer. Which allgnment of the Sun, Moon, and Earth causes a lunar eclipse? А.Sun Earth Moon B.Sun Moon Earth C.Moon Sun Earth D.Earth Moon Sun
Answer:
sun earth moon
Explanation:
earths shadow blocks suns light and the moon reflects the light
PLEASE MARK BRAINLIEST
What do these two changes have in common?
deep-frying chicken
ice melting in a cup
Select all that apply.
Both are caused by cooling.
Both conserve mass.
Both are caused by heating.
Both are only physical changes.
PLEASE HELP ME!!!
Answer:
Both are caused by heating.
Explanation:
heat cooks things and melts things.
When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferences. 20 Isopods are placed in a 2-choice choice chamber. A cotton ball dampened with distilled water is placed in Chamber A; A dry cotton ball is placed in Chamber B. After 15 minutes 2 Isopods are located in Chamber B, and 18 isopods are found in Chamber A. Perform the chi-squared test to determine if the distribution of isopods is significant or due to random chance.
a) chi-squared is 1.20, no it is not significant
b) chi-squared is 8.42, no its not significant
c) Chi-squared = 12.8, yes it is significant
d) Chi-squared is 18.59, yes it is significant
Answer:
c
Explanation:
Random distribution of the Isopods should be 50/50 in A and B.
Chi-square = [tex]\frac{(O - E)^2}{E}[/tex] where O = observed frequency and E = expected frequency
Chamber O E Chi-square
A 18 10 [tex]\frac{(18 - 10)^2}{10}[/tex] = 6.4
B 2 10 [tex]\frac{(2 - 10)^2}{10}[/tex] = 6.4
Total Chi-square = 6.4 + 6.4 = 12.8
Degree of freedom = 2 - 1 = 1
Tabulated Chi-square (α = 0.05) = 3.8415
The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.
The correct option is c.