Which of the following statements about inclusion
bodies is incorrect ?
Explanation:
Inclusion bodies are reserve materials (like glycogen, lipids, pigments) that lie free in the cytoplasm and are not bounded by a membrane. They do not participate in the ingestion of food particles. Therefore, statement 2 is incorrect.
🧠 Did You Know?
NCERT describes inclusion bodies as reserve deposits in the cytoplasm, formed when resources are stored for later use.
💡 NCERT Memory Line:
Inclusion bodies: reserve materials in the cytoplasm, often not membrane-bound.
Which of the following pairs is of unicellular
algae?
Explanation:
Chlorella and Spirulina are considered unicellular organisms in NCERT. Chlorella is a simple, single-celled green alga. Spirulina is described as a blue-green alga (cyanobacterium) and, for the purposes of NCERT multiple-choice questions, treated as unicellular. Thus, this pair represents unicellular algae.
? Did You Know?
Other options include multicellular forms: Laminaria and Sargassum (brown algae), Gelidium and Gracilaria (red algae), and Anabaena (cyanobacterium) with Volvox (colonial green alga), not unicellular.
? NCERT Memory Line:
Unicellular green algae like Chlorella, and unicellular blue-green algae (spirulina) are examples used to illustrate single-celled photosynthetic organisms in NCERT discussions.
Which of the following statements are true for
the phylum-Chordata?
(A) In Urochordata notochord extends from head to tail and it is present throughout their life.
(B) In Vertebrata notochord is present during the embryonic period only.
(C) Central nervous system is dorsal and hollow.
(D) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
