11. Plants that reproduce by spores are classified into which of the following?
[A] Bryophytes
[B] Sporophytes
[C] Cryptogams
[D] Thallophytes
Show Answer
Correct Answer: C [Cryptogams]
Notes:
A cryptogam is a plant or plant-like organism that reproduces by spores without flowers or seeds.
12. Which type of cocci bacteria forms a cluster and irregular pattern?
[A] Staphylococci
[B] Diplococci
[C] Tetracocci
[D] Streptococci
Show Answer
Correct Answer: A [Staphylococci]
Notes:
Staphylococci are the correct answer here. They are known for forming grape-like clusters and irregular patterns. These are gram-positive cocci, or spherical bacteria, that belong to the family Micrococcaceae. Members of the Micrococcaceae family such as Staphylococcus, Micrococcus, and Kocuria, are ubiquitous in nature and are typically harmless, often residing on the skin and mucous membranes of humans and other mammals.
13. Which of the following is the smallest gymnosperm?
[A] Cycas
[B] Pinus
[C] Zamia
[D] Gnetum
Show Answer
Correct Answer: C [Zamia]
Notes:
The smallest gymnosperm is Zamia pygmia which reaches a height of 25 cm.
14. Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called__.
[A] Self-Pollination
[B] Cross-Pollination
[C] Fertilization
[D] Adoption
Show Answer
Correct Answer: B [Cross-Pollination]
Notes:
Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called Cross-Pollination.
15. Which is a factor promoting cross-pollination?
[A] unisexual flowers
[B] Self-incompatibility
[C] Non-Synchronization
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
Unisexual flowers, Self-incompatibility, and Non-Synchronization are the factors promoting cross-pollination
16. Which of the following helps in seed dispersal?
[A] Seeds
[B] Flowers
[C] Fruits
[D] None of these
Show Answer
Correct Answer: C [Fruits]
Notes:
Fruits are fleshy substances that usually surround the seeds. Flowers help in seed dispersal.
17. External ears are characteristics of:
[A] Birds
[B] Mammals
[C] Birds and mammals
[D] Mammals and reptiles
Show Answer
Correct Answer: B [Mammals]
Notes:
External ears are characteristics of Mammals. Mammals have hair or fur, are warm-blooded and most are born alive.
18. Which of the following layer is also known as stratum germinativum?
[A] stratum corneum
[B] stratum Basale
[C] stratum spinosum
[D] stratum lucidum
Show Answer
Correct Answer: B [stratum Basale]
Notes:
The stratum Basale layer is also known as stratum germinativum. This is the innermost layer of the epidermis. The stratum basale is also home to melanocytes that produce melanin.
19. The only connective tissue without fibroblasts is __
[A] areolar connective tissue
[B] bone
[C] cartilage
[D] blood
Show Answer
Correct Answer: D [blood]
Notes:
The only connective tissue without fibroblasts is blood. Fibroblast is the principal active cell of connective tissue.
20. Blood is a fluid connective tissue consisting of?
[A] plasma
[B] blood cells
[C] platelets
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Blood is a liquid connective tissue consisting of plasma, blood cells, and platelets. It circulates throughout our body, carrying oxygen and nutrients to various cells and tissues.
