Explain the explosive mechanism of seeds dispersal.

What is seed dispersal by explosion?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Moninder wants to find out the best temperature for mustard seeds to germinate. He uses three Petri dishes. Each dish has a layer of moist tissue paper covered with 30 mustard seeds. Moninder puts one dish in a warm cupboard, one in a cool cupboard and one in a refrigerator. He waters all of the seeds regularly for 21 days. His results for the first four days are shown in the table.

How many seeds had germinated by day 4 in the warm cupboard?

Choose a suitable word from the box to fill in the blank.

Poppy and Geranium fruits burst open when they ripen. The seeds are scattered through _____.