Why is endocytosis found in animals only?
Q2 What will happen if -
(a) Almonds are soaked in water.
(b) Excess amount of fertiliser is added to green grass lawn.
Q3 Aman,a student of class IX suffered from fever with headache.After blood test the doctor confirmed that he was suffering from Dengue & platelets count in his sample was also low
(a) What does a doctor advise if the Platelets count is very low?
(b)What precautions one should to overcome the situation?
Q4 Label X and Y
1.What is the function of X ?
What is the composition of Y?
2.Identify the above diagram and what is its common name ?
Q5 Why are xylem & Phloem called complex tissues?How they are different from each other?
Answers
Answer:
1.endocytosis is seen only in animal cells. the main reason is because animals do not have a cell wall whereas plants have a cell wall
2.a when almond is soaked in water, its size increases as it absorbs water. the main reason is that more nutrients will be absorbed into the body by soaking it in water overnight.
b. the grass will wilt
3a. the first step is to get admitted in a hospital the doctors give treatment to avoid any internal bleeding.
3b. one should avoid external injuries like pricking or hurting himself accidently because wound healing takes a lot of time as there is decrease in the number of platelets.
4. there is no diagram given
5.Xylem is the complex tissue of plants, responsible for transporting water and other nutrients to the plants. Phloem is living tissue, responsible for transporting food and other organic materials
Explanation:
1.animal cells have a plasma membrane which has a fluid like consistency thereby transportation of substances takes place easily by endocytosis whereas plants have a rigid cell wall hence no sort of endocytosis takes place.
2b. the reason is when excess fertilizer is added , the soil becomes hyper tonic in nature. that is the water will be present outside the soil particles and not absorbed by the soil. since water is not absorbed, the plant wilts and dies.
3a. if the platelet count is very low, blood transfusions are done. Tonics like papaya leaves is given as it enriches the loss of platelet as it is rich in alox 12 wil helps to regain the lost platelets.