Answer:
controlled the fertilization process.
Explanation:
Mendel took precautions to avoid contamination by pollen through self pollination of the P generation. He controlled the fertilization processes between the plants. He self pollinated the first pureline varieties to form the P generation. He then cross pollinated them to get F1 generation. Every step of his experiment was controlled.
Hostility is the emotion particularly related to Coronary Heart Disease. Hostility by definition is having stable attitude of harboring ill-feelings and negative perception towards others and even on events. According to some literature, purely speculative in nature since the researchers weren't able to measure them,such predictive effect of hostility towards CHD is brought about by elevation of stress hormones and other factors.
Answer:
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
ORR
Struggle for existence, variation and inheritance. These are said to be the necessary and sufficient conditions for natural selection to occur.
