Answer:
Pollen grains land on the stigma and move down the pollen tube into the ovary.
The recessive trait in the F1 plants appears in a ratio of 3:1.
You can do the coral snake, as the coral snake has gained adaptations of
1. Venom to kill prey and protect itself
2. Have bright coloration to warn predators that it is toxic
3. Have a forked tongue in order to smell out prey
Answer:
ai) P= Red blood cell Q= Alveoli
ii)1. It gives the lungs a large surface area to volume ratio.
2. It is moist and thin.
b) P has a disc or biconcave shape which allows the O2 to bind to it with the help of a protein called haemoglobin for it to be transferred to various parts of the body.
c) Carbon monoxide will bind to the haemoglobin to form carboxyhaemoglobin causing oxygen disruption