Which of the following is a characteristic of cells related to irritability?
Ability to respond to stimuli
Ability to synthesize proteins
Ability to generate energy
Ability to replicate DNA
Correct answer is A
Irritability, also known as responsiveness or excitability, refers to the ability of cells to detect and respond to various stimuli or changes in their environment.
Which of the following is an example of a microorganism in action as a disease vector?
Fungi decomposing dead plant material
Mosquito transmitting malaria
Bacteria causing food poisoning
Algae producing oxygen through photosynthesis
Correct answer is B
A disease vector is an organism that transmits disease-causing pathogens from one host to another. Female Anopheles mosquitoes can carry and transmit the Plasmodium parasite, which causes malaria. When an infected mosquito bites a person, it injects the parasite into the bloodstream, leading to the transmission of the disease.
One of the functions of water in seed germination is to?
dilute the embryo
make the soil wet and soft
activate the enzymes
promote aerobic respiration
Correct answer is C
The water activates special proteins, called enzymes, that begin the process of seed growth.
The beak structure of the organism is best adapted for?
pecking grass
killing and picking fish
pecking wood
sucking nectar
Correct answer is D
The beaks of nectar sucking birds are long slender and pointed.
This helps in sucking nectar and also feeding insects and food to the young ones.
Birds like Hummingbirds have this kind of beaks.
chlamydomonas
algae
volvox
euglena
Correct answer is C
Volvox is a polyphyletic genus of chlorophyte green algae in the family Volvocaceae. It forms spherical colonies of up to 50,000 cells.
Its plant body is coenobium and consists of large number of biflagellate, pear-shaped cells.
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