Question
Which of the following plants does not have independent
and free-living male and female gametophytes?Solution
Cedrus is a gymnosperm having reduced dependent gametophytes- pollen and endosperm. In gymnosperms the male and the female gametophytes do not have an independent free-living existence and remain within the sporangia and are retained on the sporophytes.
Find the fourth proportion of 3, 8 and 18.
- Find the fourth proportion of (3k), (4k), and (6k). (Note: 'k' is the smallest two-digit prime number.)
Ratio between two numbers is 3:5 and their difference is 24. Find the sum of the given two numbers.
Find the fourth proportion of 5, 12 and 30.
The sum of three numbers is 324. If the ratio of the first to the second is 4:5 and that of second to the third is 7:9 then the second number is?Â
In a class, the ratio of number of boys to number of girls is 7:5. If 1 boy joined the class and 1 girl left the class, then the ratio becomes 5:3. Find...
A sum of Rs.10600 is to be divided among 6 brothers, 5 sisters and 3 aunts. If each sister receives four times as much as each aunt and each brother rec...
The ages of A, B and C are in the ratio of 4:7:9 respectively. If the sum of their ages is 40 years, then find the age of B.
The average height of three boys is 170 cm. If their heights are in the ratio 6:4:7, what is the height of the tallest boy?
- If the mean proportion of 3.6 and 1.6 is 'k', then find the value of '5k'.
