When the black coloured guinea pig (BB) is crossed with white coloured guinea pig (bb):
Parents: BB x bb
Gametes: B, B x b, b
F
1
generation: All Bb (black coloured guinea pig)
Selfing: Bb x Bb
Gametes: b, b x B, b
F
2
generation: BB, Bb, Bb and bb
The offsprings produced in the F
2
generation are:
BB- black coloured guinea pig
2 Bb- black coloured guinea pig
bb- white coloured guinea pig
The genotypic ratio is 1:2:1. (1 BB, 2Bb and 1 bb)
The phenotypic ratio is 3:1 (3 black and 1 white)
Phytoplankton cells are commonly identified with a microscope. A trained technician can identify many different kinds of diatoms and dinoflagelates in a plankton sample. However, the emerging science of pigment analysis can be faster, cheaper, and less labor-intensive.
Answer:
Calvin reaction
Explanation:
Though not directly dependent on sunlight but it uses the product from sunlight reaction
Answer: B. It decreases activation energy.
Explanation: A regular reaction has high activation energy required for the reaction to occur. Enzymes act as catalysts that decrease activation energy and speed up the reaction.
When people are presented with a stimulus, the brain processes the information in two pathways. The "fast" pathway goes from the thalamus directly to the Amygdala.
Explanation:
Amygdala is the part of the emotional brain which is associated with the perception of fear, sadness, anger and agression.
Amygdala also plays a role in sexual activity and libido. The size of amygdala greatly reflects the rate of functional activity of the amygdala.
When the perception of stimulus follows fast pathway then the information travels directly from thalamus to amygdala and if it follows a slow pathway then the information passes from thalamus to cortex and then to the amygdala.