Answer: In the field of molecular biology the correct sequence of events are as follows:
1. Gregor Mendel proves the Laws of Inheritance in 1865.
2. Friedrich Miescher conducted experiments to identify nuclein as the building blocks of life in 1869.
3. James Watson and Francis Crick presented a model of DNA in 1953.
4. Frederick Sanger developed a method for sequencing DNA in 1977.
Ground Substance is the correct answer
Answer:
4 km/h
Explanation:
Average speed = Distance / time
Distance = 2 km
Time = 30 minutes = 0.5 hours [For units to match]
Average speed
= 2 / 0.5
= 2 x 2
= 4 km/h
Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls.
