Class 10 Biology11)Identify the two organisms which are now extinct and are studied from their fossils.
dinosaur and fish (Knightia)
Class 10 Biology12)Which of the following decides the sex of the child?
male gamete, i.e., sperm
Class 10 Biology13)A cross between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of a
Dihybrid cross
Class 10 Biology14)Which of the following characters can be acquired but not inherited?
Size of body
Class 10 Biology15)Those organs which have the same basic structure but different functions are called
Homologous organs
Class 10 Biology16)Those organs which have different basic structure but have similar appearance and perform similar functions are called
Analogous organs
Class 10 Biology17)The remaps (or impressions) of dead animals or plant? that lived in the remote past are known as
fossils
Class 10 Biology18)The process by which new species develop from the existing species is known as
Speciation
Class 10 Biology19)Which of the following is an example of genetic variation?
Two children have different eye colours.
Class 10 Biology20)Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?
Weight