CBSE Class X – Science Biology Exam ( Full Syllabus)

What is the phenotypic ratio obtained in Mendels dihybrid cross

Laws of inheritance were proposed by

Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria?

A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the exact homologous structures?

A trait in an organism is infuenced by:

From the list given below, select the character which can be acquired but not inherited:

The number of pair(s) of sex chromosomes in the zygote of humans is

Select the group which shares the maximum number of common characters

Factors responsible for the rapid spread of bread mould on slices of bread are:

1. Large number of spores
2. Availability of moisture and nutrients in the bread
3. Presence of tubular branched hyphae
4. Formation of round shaped sporangia

The number of chromosomes in parents and ofsprings of a particular species remains unchanged due to

Reproduction is essential for living organisms to order to:

What is the mode of asexual reproduction in Amoeba?

Which of the following is a bacterial STD?

which of the following is a viral STD?

A pair of long convoluted tubes that carry ova or eggs from the ovary to the uterus is known as

A surgical method of Blocking vas deferens to prevent pregnancy is done for

Which part of alimentary canal collects bile from the liver?

The blood leaving the tissues becomes richer in:

The xylem in plants are responsible for

The opening and closing of the stomatal pore depends upon:

The organ of the circulatory system in humans.

In which form do plants store the carbohydrates which are not used immediately?

The two substances which are selectively reabsorbed from Nephriitic filtrate into the blood.

The main excretony waste removed by kidneys from blood

The hormone whose level in the blood is responsible for the above diabetes