STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

Statement $I:$Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies.

Statement $II:$Rheumatoid arthritis is a condition where body does not attack self cells.

In the light of the above statements, choose the most appropriate answer from the options given below:

$(1)$ End of process of oogenesis

$(2)$ Induces the completion of the second meiotic division

$(3)$ The corpus luteum degenerates

$(4)$ Signals for maintain progesterone level in blood

$(5)$ Formation of zygote

$(A)$ The earliest organisms that appeared on the earth were non­green and presumably anaerobes.

$(B)$ The first autotrophic organisms were the chemoautotrophs that never released oxygen.Of the above statements which one of the following options is correct?