Get premium membership and access questions with answers, video lessons as well as revision papers.
a) The human eyes lack the ability to perceive electrons/ electron beam (s)
- Electrons can only form images on these materials fluorescent screen or photographic plates;
b) Specimens are harmful to the human eye
johnmulu answered the question on January 18, 2017 at 07:54
- Name two strengthening tissues in plants other than xylem(Solved)
Other than xylem tissue, name two strengthening tissues in plants.
Date posted: January 17, 2017. Answers (1)
- Name the main mineral elements obtained from insects by insectivorous plants(Solved)
Name the main mineral elements obtained from insects by insectivoros plants
Date posted: January 16, 2017. Answers (1)
- State two factors within the seed that cause seed dormancy(Solved)
Which factors within the seed that cause seed dormancy?
Date posted: January 16, 2017. Answers (1)
- Name the ground material of each of the following organelles(Solved)
Name the ground material of each of the following organelles:
a) Chloroplast
b) Nucleus
c) Mitochondrion
d) Plant cell vacuole
Date posted: January 16, 2017. Answers (1)
- Explain why only mutations in the genes of gametes can influence evolution(Solved)
Explain why only mutations in the genes of gametes can influence evolution.
Date posted: January 16, 2017. Answers (1)
- What type of evolution produces analogous structures?(Solved)
Name the type of evolution that produces analogous structures
Date posted: January 16, 2017. Answers (1)
- Name two important functions of fruits to the life cycle of plant(Solved)
What are the important functions of fruits to the life cycle of plant?
Date posted: January 16, 2017. Answers (1)
- What is name given to addition of a dye to specimen during the preparation for viewing under the light microscope?(Solved)
Addition of a dye to specimen during the preparation for viewing under the light microscope is called
Date posted: January 16, 2017.
- Give one living cell in the plant and in the animal body that, when mature, lacks a nucleus (Solved)
Name one living cell in the plant and in the animal body that, when mature, lacks a nucleus.
Date posted: January 16, 2017. Answers (1)
- What is the role of air in a germinating seed?(Solved)
What is the role of air in a germinating seed?
Date posted: January 16, 2017. Answers (1)
- What are the advantages of metamorphosis to the life of insects?(Solved)
Give two advantages of metamorphosis to the life of insects.
Date posted: January 16, 2017. Answers (1)
- What is the difference between homologous and analogous structures?(Solved)
Give the difference between homologous and analogous structures.
Date posted: January 16, 2017. Answers (1)
- Name two respiratory surfaces in a mature frog apart from the lungs(Solved)
Name two respiratory surfaces in a mature frog apart from the lungs.
Date posted: January 16, 2017. Answers (1)
- What is the effect of denitrifying bacteria in the soil?(Solved)
Give the effect of denitrifying bacteria in the soil.
Date posted: January 16, 2017. Answers (1)
- Where does nitrogen fixation take place in a plant?(Solved)
Name the part of plant where nitrogen fixation takes place.
Date posted: January 16, 2017. Answers (1)
- State two water-borne human diseases that are characterized by severe diarrhea(Solved)
State two water-borne human diseases that are characterized by severe diarrhea.
Date posted: January 16, 2017. Answers (1)
- Name the habitat of a plant that has the following characteristics(Solved)
Name the habitat of a plant that:
i) Has stomata on the upper leaf surface only
ii) Has sunken stomatal pores
Date posted: January 16, 2017. Answers (1)
- Which factors which destroy the semi - permeability of the cell membrane?(Solved)
State two factors which destroy the semi-permeability of the cell membrane.
Date posted: January 16, 2017. Answers (1)
- Name the organelle that performs each of the following functions in a cell(Solved)
Name the organelle that performs each of the following functions in a cell
i) Controls movement of substance in and out of the cell
ii) Stores enzymes
Date posted: January 16, 2017. Answers (1)
- Give one advantage of heterodonts over homodonts.(Solved)
State one advantage of heterodonts over homodonts.
Date posted: January 14, 2017. Answers (1)