Biology - Online Test
Q1. Skin is the only respiratory organ in :
Answer : Option C
Explaination / Solution:
There are no special respiratory organs in Hirudinaria. In addition to its primary role of a protective covering, the skin also serves a respiratory function. It is provided with a rich supply of haemocoelomic fluid in an extensive system of capillaries and capillary loops, which penetrate into the spaces between the inner ends of the epidermal cells.
Q2. Cloning is not meant for
Answer : Option C
Explaination / Solution:
Cloning is the method of increasing the number of individual having similar genetic organization. It is not a means of reproduction or production of the organism.
Q3. Biological diversity level that doesn’t exist is:
Answer : Option C
Explaination / Solution:
Biological diversity level is classified as alpha, beta and gamma. Delta is not a biological diversity level.
The terms alpha, beta, and gamma diversity were all introduced by R. H. Whittaker to describe the spatial component of biodiversity. Imagine that you have a landscape containing of a number of separate sites and habitats. Alpha diversity is just the diversity of each site (local species pool). Beta diversity represents the differences in species composition among sites. Gamma diversity is the diversity of the entire landscape (regional species pool).
Q4. In Coelenterates, the cell shows
Answer : Option D
Explaination / Solution:
In coelenterates, the arrangement of cells is more complex. Here, the cells performing the same function are arranged into tissues, hence is called tissue level of organisation.
Q5. The flower which possesses both androecium and gynoecium is called perfect or:-
Answer : Option D
Explaination / Solution:
Bisexual flower conation both male and female reproductive parts i.e. sepals and petals. These flowers are also called as monoecious or hermaphrodite.
Q6. External genitalia of human female is called as
Answer : Option D
Explaination / Solution:
The external genitalia of human female is called vulva. Vulva includes mons pubis, labia majora, labia minora, hymen and clitoris.
Q7. The inhibition of enzyme activity by the presence of a chemical that competes with the substrate for binding to the active site of the enzyme is called
Answer : Option C
Explaination / Solution:
The inhibition of enzyme activity by presence of a chemical that competes with thesubstrate for binding to the active site of the enzyme is called substrate analogue.
Q8. Where (a) is a neutrophil, identify the other four WBCs?
Answer : Option C
Explaination / Solution:
There are two main categories of WBCs – granulocytes and agranulocytes. Neutrophils, eosinophils and basophils are different types of granulocytes, while lymphocytes and monocytes are the agranulocytes.
Q9. Genotype is the
Answer : Option A
Explaination / Solution:
Genotype is the genetic combination of an individual. TT and Tt are genotypically different but phenotypically appear tall.
Q10. Respiration is
Answer : Option B
Explaination / Solution:
Catabolism is process of break down of any large substance into smaller ones. In respiration, glucose is broken down into carbon dioxide and water molecules. Thus it is referred to as a catabolic reaction
