During which geological period of evolution did the greatest diversification of life occurred on the earth?
Permian
Jurassic
Cambrian
Ordovician
C.
Cambrian
The Cambrian explosion in the Cambrian period marks the occurrence of greatest diversification on the earth.
Most major phyla appeared (indicated by fossil study) divergence of modern Metazoan phyla occurred and major diversification of other organisms.
Before this period, most organisms were simple however, this changed after Cambrian period, the diversification rate accelerated and the diversity of life began to resemble that of today.
Which of the following is not correctly matched?
Trichomonas vaginalis – Leishmaniasis
Glossina palpalis – Sleeping sickness
Aedes agypti – Yellow fever
Culex pipceins – Filariasis
The portion of the endometrium that covers the embryo and is located between the embryo and the uterine cavity is the
Decidua basalis
Desidua umbilicus
Desidua capsularis
Deciduas functionalis
Specific radioactive identification of ribosomal RNA can be achieved by using C14 labelled
Guanine
Uracil
thymine
Cytocine
What base is responsible for hot spots for spontaneous pint mutations?
Adenine
Guanine
5-bromouracil
5-methyl cytosine
An occupational lung disease that occurs in humans, among those given below is
Dyspnea
Anthracosis
Atelectasis
Cyanosis
The number of chromosomes in a primary spermatocyte is
Same as in spermatid
Same as in spermatogonium
Help of that in spermatogonium
Same as in secondary spermatocyte
