NAT REVIEWER

Bicol University
College of Education
Daraga Albay

INTEGRATED LABORATORY HIGH SCHOOL
NAT REVIEWER

Name _________________________ Section _______________ Date __________ Score __

Directions: Reads the item carefully then shade the letter of the best answer.

1. The following are the importance of reproduction to living organisms EXCEPT.
a. It is essential for the continued of the species. A B C D
b. It allows an organism to produce offspring rapidly. O O O O
c. Its assured genetic variation with their offspring.
d. It ensured survival of the species.
2. Which of the following grouping is correct?
a. Corm- tuber-rhizome –scion
b. Marcotting – cutting – scion –suckers O O O O
c. Clone – gametes –zygote – sex cells
d. Fission – budding – regeneration – fragmentation
3. A farmer planted corn in his farm, but grasses grows very fast competing nutrition with each other. What kind of reproduction do grasses have if it grows fast along surfaces of the soil?
a. Runner O O O O
b. Bulb
c. Asexual
d. Sexual
4. It is a reproduction cycle in plants which generally involves a diploid sporophyte generation that alternates with a haploid gametophyte generation.
a. Alternation of generation
b. Life cycle O O O O
c. Sporophyte generation
d. Gametophyte generation
5. Which reproductive structure is a specialized leaf?
a. Tuber of potato
b. Suckers of banana O O O O
c. Rhizomes of ginger
d. Bulb of onion
6. Reproduction without the use of gametes is termed as¬¬¬¬¬¬¬¬¬¬¬¬___¬¬__
a. Asexual
b. Grafting O O O O
c. Sexual
d. Water-borne
7. It is an asexual method which needs human propagation.
a. Artificial plant propagation
b. Vegetative reproduction O O O O
c. Fertilization
d. Parthenogenesis
8. The growth of plants from the nodes of underground horizontal root like stem of ginger are examples of _____
a. Pollination
b. Artificial plant propagation O O O O
c. Rhizome
d. Sexual reproduction
9. Fission is a process of asexual reproduction occurring on _____
a. Mosses
b. Humans O O O O
c. Fungi
d. Amoeba
10. Saccharomyces cerrivisae is also called brewer’s yeast. What kind of asexual reproduction does it exhibit?
a. Fission
b. Budding O O O O
c. Fragmentation
d. Regeneratio
11.When meiosis is completed, the quantity of DNA in each daughter cell nucleus will be ____.
a. The same as the parent nucleus O O O O
b. Half as much as the parent nucleus
c. Twice as much as the parent nucleus
d. Variable, depending on the activity within the cytoplasm
12. What kind of cells is produced during meiosis in the ovary? O O O O
a. 23 diploid ova
b. 4 haploid ova
c. 1 diploid ovum
d. 1 haploid ovum
13. The exchange of genetic material between homologous chromosomes is called _____.
a. synapsis
b. crossing over O O O O
c. transgenics
d. transplants
14. When an organism with 8 chromosomes undergoes the process of mitosis, how many chromosomes does the organism will have after the mitotic division?
a. 18 O O O O
b. 12
c. 8
d. 4
15. Cytokinesis in plant cells happens by the formation of ______.
a. cell plate
b. cleavage furrow O O O O
c. cell membrane
d. nuclear envelope
16. The phase of mitosis where the sister chromatids moves toward opposite poles is ______.
a. Telophase O O O O
b. Anaphase
c. Metaphase
d. Prophase
17. Which of the following statements is not true about the process of meiosis?
a. It produces genetic variations among sexually O O O O
reproducing organisms
b. It increases half the number of chromosomes in
the gametes
c. There are four daughter cells produced after
one meiotic process
d. None of the above
18. Meiosis is the main event involved in the process of gamete Formation called ______.
a. Oogenesis O O O O
b. Spermatogenesis
c. Gametogenesis
d. Ovulation

19. The diploid number of chromosome in humans is restored during ______.
a. Zygote formation O O O O
b. Conception
c. Fertilization
d. Sexual reproduction
20. Mitosis is used by multicellular organisms EXCEPT
a. Growth and development
b. Repair of tissues O O O O
c. Sexual reproduction
d. Increases the number of cells without
changing the traits of the cells
21. What error in meiosis results when a chromosome failed to split in half resulting with an extra chromosome and another with one less chromosome?
a. Non-splitting
b. Non-shearing O O O O
c. Nondisjunction
d. None of the above
22. Which process produces two identical cells?
a. Mitosis
b. Meiosis II O O O O
c. Meiosis I
d. Metaphase
23. Which of the following diseases is the uncontrolled proliferation of cells due to a very high mitotic rate?
a. Tumor
b. Cancer O O O O
c. Cyst
d. Hemorrhage
24. In the cell, which structure produces spindle fibers which help in the alignment of chromosomes during metaphase?
a. Centromere
b. Centrioles O O O O
c. Microfilament
d. Kinetochores
25. The chromosome number 46 represents two sets of
chromosomes, this is referred as the ____ number or 2N.
a. Haploid
b. Diploid O O O O
c. Autosomes
d. None of the above

26. This is an outpacketing of the skin that hungs below the pelvic region
a. Scrotum
b. Penis O O O O
c Urethra
d. prostate

27. One pair of primary reproductive organ which are packed with sperm producing tubules.
a. penis
b. Testis O O O O
c. ovary
d. clitoris
28. One pair of ducts in which sperm complete maturation
a. Penis
b. Epididymis O O O O
c. Clitoris
d. testis
29. This is where the sperm formation begins
a. Seminiferous tubules
b. Epididymis O O O O c. Urethra
d. testis
30. A thick fluid that are expelled from the penis during sexual activity.
a. pleghm
b.mucus O O O O
c.menstruation
d. semen
31.All of the following are parts of the female external reproductive structure EXCEPT _____________?
a. Clitoris c. Labium minora O O O O
b. Labium majora d. oviduct
32Which of the following parts of the female reproductive system provides the channel to deliver the baby from the uterus to its dependent life outside the body of the mother, which is termed as the “birth canal”?
a. Uterus c. Cervix O O O O
b. Oviduct d. Uterus
33.Occurrence of secondary sex characteristics in females is due to this hormone.
a. Estrogen c. Testosterone O O O O
b. Progesterone d. Androgen
34.The hormones released by the anterior pituitary gland during the follicular phase are the __________?
a. Follicle Stimulating Hormone and Estrogen O O O O
b. Luteinizing Hormone and Progesterone
c. Follicle-Stimulating Hormone and Luteinizing Hormone
d. Estrogen and Progesterone
35.Finger-like projections on the end of the fallopian tube which captures the egg as it is released from the ovary.
a. Mammary glands c. Cilia 0 O O O
b. Fimbriae d. Endometrium
36What part of the brain releases FSH and LH in the bloodstream during the follicular phase of the Ovarian Cycle?
a. Cerebellum c. Posterior Pituitary Gland O O O O
b. Anterior Pituitary Gland d. Cerebrum
37.The “Home of the Developing Embryo” is the ___________?
a. Uterus c. Cervix O O O O
b. Fallopian Tube d. Vagina
38.The monthly release of blood and tissue is called ______________?
a. Ovulation c. Fertilization O O O O
b. Menstruation d. Copulation
39.The part of the Uterus or the uterine lining were fertilized egg is implanted.
a. Follicle c. Corpus Luteum O O O O
b. Endometrium d. Cilia
40.The part of the female reproductive system which has another name after the Italian anatomist Gabriel Fallopius.
a. Cervix c. Oviduct O O O O
b. Clitoris d. Uterus