The heterosporous pteridophytes show certain characteristics, which are precursor to the seed habit in gymnosperms. Explain.

Characters of a phylum are given below: Read the characters carefully and answer the question. i. These are aquatic organisms. ii. They have special cells known as collar cells. iii. They reproduce asexually by budding and/ or by sexual method. iv. Their body is supported by spicules made up of calcium carbonate or silica. Animal of which phylum show the given characteristics?

Pea, gram, groundnut which are dicot seeds, show what type of germination?

Answer the following question: The following table shows current in amperse and potential difference in Volts. Which law will the graph prove? Explain the law.

Read the paragraph and answer the questions given below : Locomotion is considered as an important characteristics of the animals. However, animals belonging to Porifera are said to be sedentary. Every other phylum has typical locomotory organs. E.g. Nereis crawls with the help of parapodia, whereas earthworm buries in soil by setae. Spiders have four pairs of walking legs, crab has five while all insects have three pairs of walking legs. The walking legs are also called appendages. Starfish moves with the help of tube feet. Snails and bivalves use muscular foot for locomotion. Birds flying with their spread out wings and fish swimming with their fins, both have spindle-shaped body tapering at both the ends. While flying or swimming such body offers least resistance during locomotion. Mammals have two pairs of limbs while animals like snakes are limbless. Other animals belonging to the class of snakes also have very weak limbs.which make them creep on the ground. Answer the question: Which class of animals show weak legs?

Complete the sentences and explain them: (Angiosperms, gymnosperms, spores, bryophyta, thallophyta, zygote) In pteridophytes, asexual reproduction occurs by ……..formation and sextual reproduction occurs by ……..formation.

This bar graph shows the temperatures in degree Celsius in different cities on a certain day in February. Observe the graph and answer the questions : Which city had the highest temperature ?

Read the statements given below and identify the concepts explained in them. During an experiment, Viraj records that certain property of a light ray remains unchanged no matter from which medium the ray is travelling. Name that property.

This bar graph shows the temperatures in degree Celsius in different cities on a certain day in February. Observe the graph and answer the questions : Which cities had a maximum temperature of 30^@C ?