laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 31

In ecological succession; the intermediate developmental phase is known as

1. ecesis
2. climax
3. nudation
4. sere

✅ Correct Answer: 4

This is true about secondary succession

1. follows primary succession
2. takes place on a deforested site
3. is similar to primary succession except that it has a relatively slower pace
4. begins on a bare rock

✅ Correct Answer: 2

Lithosphere serves as a reservoir for

1. nitrogen cycles
2. carbon cycles
3. oxygen cycles
4. phosphorus cycles

✅ Correct Answer: 4

This is not a climax vegetation

1. grasses
2. savannah
3. forests
4. hydrophytes

✅ Correct Answer: 4

This about ecological succession is incorrect

1. food chain relationships become more complex
2. species diversity increases as succession proceeds
3. role of decomposers becomes all the more important
4. is a random process

✅ Correct Answer: 4

An example of plants occupying the second stage of hydrosere is

1. Salix
2. Vallisneria
3. Azolla
4. Typha

✅ Correct Answer: 2

On the sand; ecological succession is

1. halosere
2. xerosere
3. hydrosere
4. psammosere

✅ Correct Answer: 4

Order of basic processes involved in succession is

1. invasion -> stabilization -> completion and coaction -> reaction -> nudation
2. nudation -> stabilization -> completion and coaction -> invasion -> reaction
3. invasion -> nudation -> completion and coaction -> reaction -> stabilization
4. nudation -> invasion -> completion and coaction -> reaction -> stabilization

✅ Correct Answer: 4

Process of the successful establishment of species in a new area is known as

1. climax
2. sere
3. ecesis
4. invasion

✅ Correct Answer: 3

In ecological succession; the final stable community is known as

1. climax community
2. ultimate community
3. final community
4. seral community

✅ Correct Answer: 1

This is a major reason for infertility in women

1. Anovulation
2. Weight
3. Age
4. All of these

✅ Correct Answer: 4

Boosting the intake of _________ can help women trying to conceive

1. Potassium
2. Folic acid
3. Lycopene
4. Nickel

✅ Correct Answer: 2

Nerve supply of ovary is through

1. Sacral fibers
2. Pudendal nerve
3. Branches of renal and aortic plexus
4. none of the above

✅ Correct Answer: 3

Menstrual phase bleeding is due to

1. necrosin
2. fibrinolysis
3. menotoxin
4. vasoconstriction and ischaemia

✅ Correct Answer: 4

Fertility in women is impaired by

1. Hernia
2. High blood pressure
3. Obesity
4. Gallstones

✅ Correct Answer: 3

Infertility is when a couple fails to conceive after

1. 4 years of unprotected sex
2. 3years of unprotected sex
3. 2 years of unprotected sex
4. 1 year of unprotected sex

✅ Correct Answer: 4

Procedures used to treat infertility are

1. ICSI – Intracytoplasmic Sperm Injection
2. IVF – In Vitro Fertilization
3. IUI – Intrauterine insemination
4. All of these

✅ Correct Answer: 4

Right ovarian artery arises from

1. Uterine artery
2. Aorta
3. Renal artery
4. Common iliac artery

✅ Correct Answer: 2

This condition impairs infertility

1. PCOD
2. Fibroids
3. Endometriosis
4. All of these

✅ Correct Answer: 4

In women; this sexually transmitted disease can result in infertility

1. Human papillomavirus (HPV)
2. Pelvic inflammatory disease
3. Genital herpes
4. None of the above

✅ Correct Answer: 2

Lymph differs from blood in having ________.

1. Much more of water content
2. No WBC
3. No RBC
4. No protein

✅ Correct Answer: 3

What happens to the red blood cells when it is kept in 0.8% NaCl?

1. Burst
2. Shrink
3. Remains unchanged
4. None of the above

✅ Correct Answer: 3

Division of White Blood Cells takes place by_____

1. Meiosis
2. Amitosis
3. Mitosis
4. None of the above

✅ Correct Answer: 4

Least constancy of shape is exhibited by_______.

1. Blood platelets
2. Epithelial Cells
3. White Blood Cells
4. Red blood Cells

✅ Correct Answer: 3

Which of the following statement is true about the Camel’s erythrocytes?

1. Oval and nucleated
2. Oval and non-nucleated
3. Circular; nucleated and biconvex
4. Circular; non-nucleated and biconcave

✅ Correct Answer: 1

In adults; Red blood Cells is formed in ________.

1. The liver
2. The thymus
3. The spleen
4. The bone marrow of long bones

✅ Correct Answer: 4

What is the average life span of human Red blood Cells?

1. 90 days
2. 100 days
3. 120 days
4. None of the above

✅ Correct Answer: 3

When the count of white blood cells drops below the optimum level of blood it is known as ________?

1. Anaemia
2. Leukopenia
3. Leukaemia
4. All of the above

✅ Correct Answer: 2

The protein content is the highest in the lymphatics of ________.

1. Liver
2. Kidney
3. Below the skin
4. All the above

✅ Correct Answer: 1

An abnormal rise in the number of RBC count is known as________.

1. Polycythemia
2. Anaemia
3. Leukemia
4. All the above

✅ Correct Answer: 1

Which of the following organ is formed during gastrulation?

1. Gill
2. Vitelline membrane
3. Heart
4. Archenteron

✅ Correct Answer: 4

Mesoderm gives rise to all the structures except ______.

1. Gonads
2. Circulatory system
3. Nervous system
4. Muscular system

✅ Correct Answer: 3

In human females; the fertilized eggs get implanted in the uterus after ________.

1. One month of fertilization
2. Two months of fertilization
3. Seven days of fertilization
4. Three weeks of fertilization

✅ Correct Answer: 3

Brain; nerve cells and spinal cord or the central nervous system develops from embryonic ______.

1. Mesoderm
2. Endoderm
3. Ectoderm
4. Both (b) and (c)

✅ Correct Answer: 3

Which of the following options contains only the mesodermal structures?

1. Heart; blood; bones; notochord
2. Heart; blood; muscles; liver
3. Notochord; blood; liver; muscles
4. Liver; heart; bones; blood

✅ Correct Answer: 1

Implantation is the process of__________.

1. Attachment of blastocyst to the uterine wall
2. Egg movement
3. Degeneration of egg
4. Egg fertilization

✅ Correct Answer: 1

Which of the following embryo has a parasitic mode of nutrition?

1. Mammalian embryo
2. Bird’s embryo
3. Amphibian embryo
4. Reptilian embryo

✅ Correct Answer: 1

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?

1. Recipient egg dies
2. Donor nuclei die in the new environment
3. Cleavage occurs but is arrested after some time
4. Formation of the viable embryo in the recipient eggs

✅ Correct Answer: 4

Egg implantation is followed by______.

1. Parturition
2. Copulation
3. Fertilization
4. Gestation

✅ Correct Answer: 4

Pseudopregnancy is a physiological condition; comparable to normal pregnancy except that there is no__________.

1. endometrial changes
2. developing foetus
3. corpus luteum
4. developing ovum

✅ Correct Answer: 2

This is also known as meroblastic cleavage

1. Partial
2. Unequal holoblastic
3. Equal holoblastic
4. Superficial

✅ Correct Answer: 1

The type of cleavage found in insects

1. Holoblastic
2. Discoidal
3. Superficial
4. Meroblastic

✅ Correct Answer: 3

Discoidal and superficial cleavages are types of

1. Unequal holoblastic
2. equal holoblastic
3. both (a) and (b)
4. Meroblastic

✅ Correct Answer: 4

If the first cleavage furrow divides zygote completely into two; the cleavage type is

1. meroblastic
2. holoblastic
3. equatorial
4. radial

✅ Correct Answer: 2

The only human system that is derived from all the three germ layers is

1. Nervous system
2. Digestive system
3. Respiratory system
4. Excretory system

✅ Correct Answer: 2

The fertilized egg divides by the process of

1. Oogenesis
2. Cleavage
3. Regeneration
4. Invagination

✅ Correct Answer: 2

If an unfertilized egg is pricked with a microneedle; it will

1. transform into a tadpole at a faster rate
2. die immediately
3. will remain undivided
4. start dividing

✅ Correct Answer: 4

A freshly unfertilized egg of hen contains

1. 10;000 cells
2. 1;000 cells
3. 100 cells
4. one cell

✅ Correct Answer: 4

How many cleavages are completed in the 16-celled stage of an egg?

1. 12
2. 8
3. 4
4. 3

✅ Correct Answer: 3

The spindle in the determinate cleavage is

1. Horizontal
2. Oblique
3. Vertical
4. Sub-equatorial

✅ Correct Answer: 2