Hydra has no specialized excretory system because:

✅ A. Primary wall

Option A: Primary wall Option B: Secondary wall Option C: Middle lamella Option D: all of the above Correct Answer : Primary wall Read more

✅ C. Water

Option A: Carbohydrates Option B: Fatty acid Option C: Water Option D: Protein Correct Answer : Water Read more

✅ B. Rusts smuts and molds

Option A: Mushrooms morels and truffles Option B: Rusts smuts and molds Option C: Penicillium Option D: All of these Correct Answer : Rusts smuts and molds Read more

✅ A. Molecular biologists

Option A: Molecular biologists Option B: Microbiologists Option C: Freshwater biologists Option D: Social biologist Correct Answer : Molecular biologists Read more

✅ D. Leeuwenhoek

Option A: Robert Koch Option B: Louis Pasteur Option C: Alexander Fleming Option D: Leeuwenhoek Correct Answer : Leeuwenhoek Read more

✅ B. Genes

Option A: Nucleus Option B: Genes Option C: Chromosomes Option D: Nucleolus Correct Answer : Genes Read more

✅ D. Organelles

Option A: Molecule Option B: Subatomic particles Option C: Atoms Option D: Organelles Correct Answer : Organelles Read more

✅ B. 4

Option A: 3 Option B: 4 Option C: 5 Option D: 2 Correct Answer : 4 Read more