Question 2 : If the tail of the mice is removed by surgery in each generation, do these tailless mice have tailless progeny?

Question 3 : In the following cross, rr yy x rr yy ,the characteristics of the progeny is

Question 4 : What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?

Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce4273b230584979b61.PNG' /> In the above figure, study the given cross showing self pollination in $F_1$, fill in the blank.

Question 6 : 'Darwin’s theory of evolution tells us how life evolved from simple to more complex forms'. State whether this statement is True or False.

Question 7 : The theory of evolution of species by natural selection was given by ?

Question 8 : The number of successful variations are maximised by the process of ____________

Question 9 : In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in $F_2$ is

Question 10 : The process by which new species develop from the existing species is known as _____.

Question 12 : Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that :

Question 13 : Some dinosaurs had feathers although they could fly but birds have feathers that help them to fly. In the context of evolution this means that -----------.

Question 16 : The roots of a coconut tree are seen growing far from the plant. Such a kind of movement of root for want of water is&#160;<br/>

Question 26 : Which of the following hormones is responsible for&#160;hoarseness in voice, beard, moustaches etc. in males?<br/>

Question 29 : With reference to the pituitary, which of the following&#160;statements is true?<br/>

Question 30 : One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third increases the tolerance of plants to various stresses. They are respectively

Question 31 : The kidneys in human beings are a part of the system for

Question 35 : _________________ serves as internal energy reserve to be used as and when required by plants.

Question 37 : Blood consists of a fluid medium called ___________ in which transports food, carbon dioxide and nitrogenous wastes in dissolved form.

Question 38 : Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

Question 39 : Each kidney has large numbers of these filtration units called _____________ packed close together.

Question 41 : Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

Question 44 : What is the role of saliva in the digestion of food?

Question 45 : _____________ takes in food using temporary finger-like extensions of the cell surface which fuse over the food particle forming a food-vacuole.

Question 46 : Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant?

Question 47 : In a flower, the parts that produce male and female gametes (germ cells) are

Question 48 : Which of the following is the correct sequence of events of sexual reproduction in a flower?

Question 49 : What changes are observed in the uterus if fertilisation does not occur?

Question 50 : State whether the statement is TRUE or FALSE : After fertilisation Flowers give rise to fruits.

Question 51 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185078c526e972caea1f.PNG' /> In the above figure, which part mention the function Production of egg

Question 52 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185078c526e972caea1f.PNG' /> In the above figure, which part mention the function Site of implantation.

Question 53 : State whether the statement is TRUE or FALSE : Offspring formed by asexual method of reproduction have greater similarity among themselves because asexual reproduction does not involve gametes.

Question 54 : Whether secretion of estrogen is the function of testes at puberty?

Question 55 : In tobacco plant, the male gametes have twenty four chromosome.What is the number of chromosomes in the zygote?

Question 56 : State whether the statement is TRUE or FALSE : Amoeba is reproduced by the asexual method.

Question 57 : State whether the statement is TRUE or FALSE : Unisexual flowers possess both stamen and pistil.

Question 59 : State whether the statement is TRUE or FALSE : Offspring formed by asexual method of reproduction have greater similarity among themselves because asexual reproduction involves only one parent.

Question 60 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185078c526e972caea1f.PNG' /> In the above figure, which part mention the function Entry of the sperms.