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NEET Biology MCQS Mock Test Paper 31
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1. In ecological succession; the intermediate developmental phase is known as
ecesis
climax
nudation
sere
2. This is true about secondary succession
follows primary succession
takes place on a deforested site
is similar to primary succession except that it has a relatively slower pace
begins on a bare rock
3. Lithosphere serves as a reservoir for
nitrogen cycles
carbon cycles
oxygen cycles
phosphorus cycles
4. This is not a climax vegetation
grasses
savannah
forests
hydrophytes
5. This about ecological succession is incorrect
food chain relationships become more complex
species diversity increases as succession proceeds
role of decomposers becomes all the more important
is a random process
6. An example of plants occupying the second stage of hydrosere is
Salix
Vallisneria
Azolla
Typha
7. On the sand; ecological succession is
halosere
xerosere
hydrosere
psammosere
8. Order of basic processes involved in succession is
invasion -> stabilization -> completion and coaction -> reaction -> nudation
nudation -> stabilization -> completion and coaction -> invasion -> reaction
invasion -> nudation -> completion and coaction -> reaction -> stabilization
nudation -> invasion -> completion and coaction -> reaction -> stabilization
9. Process of the successful establishment of species in a new area is known as
climax
sere
ecesis
invasion
10. In ecological succession; the final stable community is known as
climax community
ultimate community
final community
seral community
11. This is a major reason for infertility in women
Anovulation
Weight
Age
All of these
12. Boosting the intake of _________ can help women trying to conceive
Potassium
Folic acid
Lycopene
Nickel
13. Nerve supply of ovary is through
Sacral fibers
Pudendal nerve
Branches of renal and aortic plexus
none of the above
14. Menstrual phase bleeding is due to
necrosin
fibrinolysis
menotoxin
vasoconstriction and ischaemia
15. Fertility in women is impaired by
Hernia
High blood pressure
Obesity
Gallstones
16. Infertility is when a couple fails to conceive after
4 years of unprotected sex
3years of unprotected sex
2 years of unprotected sex
1 year of unprotected sex
17. Procedures used to treat infertility are
ICSI – Intracytoplasmic Sperm Injection
IVF – In Vitro Fertilization
IUI – Intrauterine insemination
All of these
18. Right ovarian artery arises from
Uterine artery
Aorta
Renal artery
Common iliac artery
19. This condition impairs infertility
PCOD
Fibroids
Endometriosis
All of these
20. In women; this sexually transmitted disease can result in infertility
Human papillomavirus (HPV)
Pelvic inflammatory disease
Genital herpes
None of the above
21. Lymph differs from blood in having ________.
Much more of water content
No WBC
No RBC
No protein
22. What happens to the red blood cells when it is kept in 0.8% NaCl?
Burst
Shrink
Remains unchanged
None of the above
23. Division of White Blood Cells takes place by_____
Meiosis
Amitosis
Mitosis
None of the above
24. Least constancy of shape is exhibited by_______.
Blood platelets
Epithelial Cells
White Blood Cells
Red blood Cells
25. Which of the following statement is true about the Camel’s erythrocytes?
Oval and nucleated
Oval and non-nucleated
Circular; nucleated and biconvex
Circular; non-nucleated and biconcave
26. In adults; Red blood Cells is formed in ________.
The liver
The thymus
The spleen
The bone marrow of long bones
27. What is the average life span of human Red blood Cells?
90 days
100 days
120 days
None of the above
28. When the count of white blood cells drops below the optimum level of blood it is known as ________?
Anaemia
Leukopenia
Leukaemia
All of the above
29. The protein content is the highest in the lymphatics of ________.
Liver
Kidney
Below the skin
All the above
30. An abnormal rise in the number of RBC count is known as________.
Polycythemia
Anaemia
Leukemia
All the above
31. Which of the following organ is formed during gastrulation?
Gill
Vitelline membrane
Heart
Archenteron
32. Mesoderm gives rise to all the structures except ______.
Gonads
Circulatory system
Nervous system
Muscular system
33. In human females; the fertilized eggs get implanted in the uterus after ________.
One month of fertilization
Two months of fertilization
Seven days of fertilization
Three weeks of fertilization
34. Brain; nerve cells and spinal cord or the central nervous system develops from embryonic ______.
Mesoderm
Endoderm
Ectoderm
Both (b) and (c)
35. Which of the following options contains only the mesodermal structures?
Heart; blood; bones; notochord
Heart; blood; muscles; liver
Notochord; blood; liver; muscles
Liver; heart; bones; blood
36. Implantation is the process of__________.
Attachment of blastocyst to the uterine wall
Egg movement
Degeneration of egg
Egg fertilization
37. Which of the following embryo has a parasitic mode of nutrition?
Mammalian embryo
Bird’s embryo
Amphibian embryo
Reptilian embryo
38. which of the following events is likely to take place; if the nuclei from an 8-celled stage of an embryo are transplanted into enucleated eggs?
Recipient egg dies
Donor nuclei die in the new environment
Cleavage occurs but is arrested after some time
Formation of the viable embryo in the recipient eggs
39. Egg implantation is followed by______.
Parturition
Copulation
Fertilization
Gestation
40. Pseudopregnancy is a physiological condition; comparable to normal pregnancy except that there is no__________.
endometrial changes
developing foetus
corpus luteum
developing ovum
41. This is also known as meroblastic cleavage
Partial
Unequal holoblastic
Equal holoblastic
Superficial
42. The type of cleavage found in insects
Holoblastic
Discoidal
Superficial
Meroblastic
43. Discoidal and superficial cleavages are types of
Unequal holoblastic
equal holoblastic
both (a) and (b)
Meroblastic
44. If the first cleavage furrow divides zygote completely into two; the cleavage type is
meroblastic
holoblastic
equatorial
radial
45. The only human system that is derived from all the three germ layers is
Nervous system
Digestive system
Respiratory system
Excretory system
46. The fertilized egg divides by the process of
Oogenesis
Cleavage
Regeneration
Invagination
47. If an unfertilized egg is pricked with a microneedle; it will
transform into a tadpole at a faster rate
die immediately
will remain undivided
start dividing
48. A freshly unfertilized egg of hen contains
10;000 cells
1;000 cells
100 cells
one cell
49. How many cleavages are completed in the 16-celled stage of an egg?
12
8
4
3
50. The spindle in the determinate cleavage is
Horizontal
Oblique
Vertical
Sub-equatorial
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