Home
Class 11
BIOLOGY
Distribution of growth in a root by maki...

Distribution of growth in a root by making it at equal intervals with indian inkwas originally studied by

A

Wellensick

B

Strasburg

C

Went

D

Nitsch

Text Solution

Verified by Experts

The correct Answer is:
B

Strasburger explains the measurement of growth in young root by marking it at 1mm intervals with Indian ink.
Promotional Banner

Similar Questions

Explore conceptually related problems

Consider the following statements pertaining to a frequency polygon of a frequency distribution of a continuous variable with seven class intervals of equal width: 1. The original frequency distribution can be reconstructed from the frequency polygon. 2. The frequency polygon touches the x-axis in its extreme right and extreme left. Which of the above statements is/are correct?

A body of mass 2 kg makes an elastic collision with another body at rest and contiues to move in the original direction with a speed equal to one thrid of its original speed. Find the mass of the second body.

The marks obtained (out of 20) by 30 students of a class in a test are as follows: 14, 16, 15, 11, 15, 14, 13, 16, 8, 10, 7, 11, 18, 15, 14, 19, 20, 7, 10, 13, 12, 14, 15, 13, 16, 17, 14, 11, 10, 20. Prepare a frequency distribution table for the above data using class intervals of equal width in which one class interval is 4-8 (excluding 8 and including 4).

The heights (in cm) of 22 students were recorded as under: 125, 132, 138, 144, 142, 136, 134, 125, 135, 130, 126, 132, 135, 142, 143, 128, 126, 136, 135, 130, 130, 133. Prepare a frequency distribution table, taking equal class intervals and starting from 125-130, where 130 is not included.

Q.find the equations of the straight lines passing through the origin and making equal angle with the co-ordinate axes.

Directions: The given pie-charts compares the total population and the female population of six countries, Australia, Canada, Germany, India, USA and Philippines. The first pie chart gives the percentage distribution of the total population of the six countries, while, the second pie chart gives the percentage distribution of the female population of the six countries. Study the pie-charts and answer the questions that follow. If the total number of females in India and USA is equal to the total population of the Philippines, then what is the ratio of the number of males in Australia to the number of females in Canada?

For the following data of daily wages (in rupees0 received by 30 labourers in a certain factory, construct a grouped frequency distribution table by dividing the range into class intervals of equal width, each corresponding to 2 rupees, in such a way that the mid-value of the first class interval corresponds to 12 rupees. 14,16,16,14,22,13,15,24,12,23,14,20,17,21,22,18,18,19,20,17,16,15,11,12,21,20,17,18,19,23