Certain dinoflagellates exhibit a unique phenomenon known as 'bioluminescence'. Which of the following accurately describes the underlying mechanism of this phenomenon?
Photosynthesis using specialized pigments
Fluorescence due to chlorophyll a
Oxidation of luciferin by luciferase in specialized organelles called scintillons
Chemosynthesis utilizing sulfur compounds
Related Questions
Select the incorrect statement for slime moulds
Slime molds lack a cell wall in their vegetative stage.
Slime molds are heterotrophic.
All slime molds are parasitic.
Slime molds can exist as single-celled or multinucleate forms.
Consider the following statements
I. Kingdom-Protista forms a link between monerans and the other organisms like plants, animal and fungi
II. Protists reproduce asexually and sexually by a process involving cell fusion and zygote formation
III. Being eukaryotes, the protistan cell body contains a well defined nucleus and other membrane-bound organelles
Which of the statements given above are correct?
I and II
I and III
II and III
I, II and III
Identify the INCORRECT statement regarding Mendel's experiments on pea plants.
Dominant traits mask recessive traits in heterozygotes
Genes for different traits assort independently
Each parent contributes one allele for each trait to its offspring
All traits studied by Mendel exhibited blending inheritance
Analyse the following statement and identify the correct option given below
I. In diatoms the walls are embedded with silica and thus, the walls are indestructible
II. Diatoms have left behind large amount of cell wall deposits in their habitat, this accumulation over billions of year is referred to as diatomaceous deposition or diatomaceous earth
I is true, but II is false
I is false, but II is true
I and II are true
I and II are false
Consider the following statements
I. Diatomite is porous and chemically inert. It is therefore, used in filtration of sugar, alcohols, oils, syrups and antibiotics
II. Diatomite deposits are often accompanied by petroleum fields
III. Desmids are mainly found in dirty water and are, usually indication of polluted water
Which of the statements given above are correct?
I and II
I and III
II and III
I, II and III
Which of the following characteristics is NOT common to all protists?
Eukaryotic cell structure
Presence of a nucleus
Membrane-bound organelles
Multicellularity
What is the foundation of the food web in the ocean?
Decomposers
Consumers
Phytoplankton
Predators
Which of the following is NOT a reason Mendel chose pea plants for his genetic studies?
Easy to cultivate
Distinct traits
Self-pollination and cross-pollination
Complex genome
Which of the following statements about Euglena is true?
Euglenoids bear flagella
Euglena when placed in continuous darkness, losses their photosynthetic activity and die
The pigments of Euglena are quite different from those of green plants
Euglena is a marine protist
Which of the following is not a character of Protista?
Eukaryotic cell structure
Presence of complex tissue organization
Mostly unicellular
Can be autotrophic or heterotrophic
