![subject](/tpl/images/cats/biologiya.png)
Biology, 06.04.2020 22:18 zyrashanson
PLEASE BE QUICK 100 points Jamal has dissected a cow's eye and is studying how well the lens refracts light. He knows that a lens will refract, or bend, light toward a certain point behind it, known as the focal point.
He removes the lens from the eye and places it 20 cm from a single light source in an otherwise dark room.
How could Jamal measure the distance between the lens and its focal point?
A.
He could hold a sheet of paper behind the lens, move it away from the lens until the light is focused on it, and then measure the distance between the paper and the lens with a ruler.
B.
He could use a ruler to measure the frequency, wavelength, and amplitude of the light waves that exit the back end of the lens.
C.
He could hold a sheet of paper between the light source and the lens, move it toward the light source until the light is focused, and then measure the distance between the paper and the lens.
D.
He could use a stopwatch to measure the time it takes light to travel from the light source, through the lens, and to the lens' focal point.
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Biology
![image](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 12:30, keelyrosewillia
Two true-breeding pea plants were crossed. one parent is round, terminal, violet, constricted, while the other expresses the respective contrasting phenotypes of wrinkled, axial, white, full. the four pairs of contrasting traits are controlled by four genes, each located on a separate chromosome. in the f1 only round, axial, violet, and full were expressed. in the f2, all possible combinations of these traits were expressed in ratios consistent with mendelian inheritance. (a) what conclusion about the inheritance of the traits can be drawn based on the f1 results? (b) in the f2 results, which phenotype appeared most frequently? what mathematical expression predicts the probability of occurrence of this phenotype? (c) which f2 phenotype is expected to occur least frequently? what mathematical expression predicts this probability? (d) in the f2 generation, how often is either of the p1 phenotypes likely to occur? express your answer as a fraction (example: 3/16).
Answers: 3
![image](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 20:00, live4dramaoy0yf9
Why do carbohydrate molecules function so well as fuel for the body?
Answers: 1
![image](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 23:00, jacquicmoreland2106
Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression. c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression. d-neelaredoxin is only produced when there is exposure to o2 or h2o2.
Answers: 3
You know the right answer?
PLEASE BE QUICK 100 points Jamal has dissected a cow's eye and is studying how well the lens refract...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.10.2019 08:31
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/himiya.png)
Chemistry, 29.10.2019 08:31
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.10.2019 08:31
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.10.2019 08:31
![Konu](/tpl/images/cats/en.png)
English, 29.10.2019 08:31
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/istoriya.png)