Class 10 Biology1)
Heredity And Evolution Class 10 MCQ Question 1. Process of selecting individuals with desired characters by man is called
Class 10 Biology2)
Which one of the following pairs are homologous organs?
Forelimbs of a bird and wings of a bat.
Class 10 Biology3)
The theory of evolution of species by natural selection was given by
Class 10 Biology4)
The number of pairs of sex chromosomes in the zygote of a human being is
Class 10 Biology5)
A zygote which has an X-chromosome inherited from the father will develop into a
Class 10 Biology6)
A man with blood group A marries a woman having blood group O. What will be the blood group of the child?
Equal chance of acquiring blood group A or blood group O.
Class 10 Biology7)
What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?
All are tall with round seeds.
Class 10 Biology8)
The human species has genetic roots in
Class 10 Biology9)
Which of the following is the ancestor of ‘Broccoli’?
Class 10 Biology10)
The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is called
A completes 20% of a work in 5 days and B completes one-third of the work in 5 days. They began the work together but B leaves after 3 days. The total number of days needed for completion of the work is:Watch Solution
Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, whereas pipe C can empty the full tank in 40 hours. All three pipes are opened together, but pipe A is closed after 10 hours. After how many hours will the remaining part of the tank be filled?Watch Solution
A, B and C can do one-third of a work in 15 days, 30 days and 10 days, respectively. A started the work. C joined him after 1 day and B joined them after 3 days of the beginning. For how many days did C work?Watch Solution
A college hostel mess has provisions for 25 days for 350 boys. At the end of 10 days, when some boys were shifted to another hostel, it was found that now the provisions will last for 21 more days. How may boys were shifted to another hostel?Watch Solution
Pipes A and B can fill a tank in 16 hours and 24 hours, respectively and pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10:30 a.m., but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m. on the same day, then what is the value of x?Watch Solution