Archenteron is formed during
Answer: early gastrula stage
Turner's syndrome is caused due to sex chromosomal composition of
Darwin's finches are a good example of
Answer: adaptive radiation
Which of the following is secondary pollutant?
A taxon which is facing an extremely high risk of extinction in the wild in immediate future is known as
Answer: critically endangered
In a mammalian embryo, the extra-embryonic membranes arise from
Removal of spleen from the human body leads to
Answer: decrease in antibody formation
Which one of the following elements is required in coagulation of blood?
The conduction of impulse from SA node moves to
Seymouria, a fossil reptile, is a missing link between
Answer: amphibians and reptiles
The Wild Life (Protection) Act was passed in the year
In ornithine cycle, which pair of the following wastes are removed from the blood?
Answer: C02 and urea , C02 and ammonia
The honeybees exhibit a particular dance to communicate the location of food. This is known as
Answer: round and waggle dance
Who stated that life originated from simple amino acids?
Which of the following is used for dating the bones?