STD 11 - 16. Excretory product and their elimination — NEET STD 11 Science — Question

Which sentence is not true for muscle contraction ?

The process by which ova are formed is knwon as

Excretory organ of crustaceans are:

Pick up the mismatched

Which of the following is a parasite protozoan

Excertory organs of Earthworm are

The wrongly matched pair w.r.t. the organisms and their probable time of evolution is

Which one of the following statement are correct.
(i) Mendel's experiments had small sample size which gave greater credibility to the data.
(ii) A true breeding line shows a stable trait inheritance and expression for several generations.
(iii) A recessive parental trait is expressed only in its heterozygous condition.
(iv) Failure of segregation of chromatids during cell division results in aneuploidy.
(v) Chromosomal disorders are mainly determined by alteration or mutation in a single gene.
(vi) Thalasemia and cystic fibrosis are Mendelian disorders.
(vii) Sickle cell anemia is an X-linked trait.
(viii) Incomplete or mosaic inheritance is an example of pre-Mendelian concept of blending inheritance.
(ix) Test cross is a special type of back cross.
(x) Chromosomal aberrations are commonly observed in cancer cells.

A cricket player is fast chasing a ball in the field. Which one of the following groups of bones are directly contributing in this movement?