Prepare a greeting card with dry leaves.as the example of herbarium

Dry ice is an example of

In a class there are 30 students. On the New year day, every student posts a greeting card to all his ther classmates. Find the total number of greeting cards posted by them.

In a class there are certain number of students. On the new year day every student posts a greeting card to all of his classmates. If the total number of greeting cards posted by them is 870. Then find the number of students.

Three different greetings cards and their corresponding covers are randomly strewn about on a table. IF Sita puts the greetings cards into the covers at random, the probability of correctly matching of all the greeting cards and covers is ……

Define Schizocarpic dry fruits. Give an example.

If you did this experiment of respiration with fruits and dry leaves, what would the resutl be? Explain.

On the occasion of Dipawali festival each student of a class sends greeting cards to the others . If there are 20 students in the class , then the total number of greeting cards exchanged by the students is

Plastic bottle, paper boat and dry leaves are grouped together due to _____

Which is true about Autotrophs ?(i) These plants contain Chlorophyll.(ii) These plants prepare their food by the process photosynthesis(iii) The leaves of these plants are in Green colour.(iv) Droseras, Utricularia and Cascuta are examples for these plants.