STD 12 - 7. human health and disease — NEET STD 11 Science — Question

Bone                              Number

$(1)$ Skull                        $1. 24$

$(2)$ Vertebrae               $2. 60$

$(3)$ Ribs                        $3. 22$

$(4)$ Sternum                 $4.1$

$(5) $ Pectoral girdles    $ 5. 2$

$(6)$ Arms                      $6. 4$

$(7)$ Ear ossicles          $7. 6$

$(8)$ Pelvic girdles        $8. 33$

The correct pairing sequence is

$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head, thorax and abdomen.

$(ii)$ Blood vascular system is of closed type.

$(iii)$ They are monoecious and both seves have well developed reproductive organs.

$(iv)$ The development of P. americana is paurometabolus, meaning there is development through nymphal stage.

$(A)$ Linked genes cause absolute lethality
$(B)$ Persons affected by $PKU$ do not show mental disorder
$(C)$ $F_{2}$ ratio in codominance and incomplete dominance are same
$(D)$ Sex of male Drosophila is dependent on $Y-$chromosome