Republic of the Philippines
Department of Education
Region VIII
Schools Division of Calbayog City
Oquendo II District
MAG-UBAY NATIONAL HIGH SCHOOL
Bgy. Mag-ubay, Calbayog City
in Science 8
Living Things and their Environment
SY:2022-2023
TEST I. DIRECTION. Read and analyze each sentence carefully. Encircle the letter of the correct answer. Erasure
means wrong.
1. A part of digestive system where undigested
particles is excreted.
a. stomach
c. Anus
b. Esophagus
d. Mouth
2. The function of this part is where the first
peristaltic action takes place.
a. Mouth
c. Esophagus
b. Anus
d. stomach
3. What is the function of this
part shown in the picture?
a. food is masticated
here so its surface
area will increase
b. muscular churning
takes place here
c. this part is where
undigested particles are excreted
d. undigested particles move in this part
4. What the correct sequence of the chemical
digestion of food, absorption and assimilation of
nutrients.
A.
Digested food particles are absorbed through villi
and microvilli structures in the small intestine out of
diffusion and other cell transport mechanisms.
B. Digestion of fats, (emulsification using bile and
digestion through lipase), carbohydrates (through
amylases from pancreas) and protein (through
pancreatic and intestinal enzymes) takes place in
the small intestine.
C. Liver process food nutrients in blood to become
compounds vital for living. Cells then make use of
various nutrients processed in the liver.
D. Hydrochloric acid and other stomach juices mix
with food to break down fats and proteins into
smaller molecules.
E. Salivary amylase starts to digest carbohydrates
breaking it into smaller compounds.
a. A, B, C, D, E
b. E, D, B, A, C
c. A,E,B,D,C
d. C,D,B,E, A
5. What is the disease of the digestive system whose
symptoms includes Heart burn with burning
sensation in the chest and upper abdomen?
a. gastro esophageal reflux disease (GERD)
b. esophageal cancer
c. Celiac Disease
d. appendicitis
6. What is the disease of the digestive system having
symptoms which includes the abnormal and swift
passage of waste material through the large
intestine, with consequent discharge of loose
feces from the anus?
a. celiac disease
c. diarrhea
b. Crohn disease
d. irritable bowel syndrome
7. What disease of the digestive system is
characterized by the inflammation of the liver that
results from a variety of causes either infectious or
non-infectious agents?
a. cirrhosis
c. hepatitis
b. gastritis
d. ulcerative colitis
8. Below are the best ways of taking good care of
your health; except one,
a. Vitamins and minerals deficiency can be
avoided if one carefully plans his menu.
b. One must take at least 5 glasses of water a
day for proper digestion and elimination of
wastes.
c. One must be mindful to eat food that is rich in
fiber to avoid loose bowel movement and
other diseases in the digestive system.
d. Eating at the right time, the right kind and the
right amount of food is the best way of
keeping our digestive system healthy.
9. Based on the pictures,
identify the digestive disease
a person is suffering from.
a. Liver Cirrhosis
b. Hepatitis
c. Colon Cancer
d. Appendicities
For items 10,11,12. Choose three best practices that
keeps digestive system healthy. Choose the answer
from the box. Shade the letter
________________
A.10.Stress
should be managed to avoid problems like
11.indigestion
________________
and loose bowel movement.
________________
B.12.Proper
diet can reduce the risk of having
gallstones.
C. One good way to avoid cholera is to make sure
that the water is safe to use.
D. Fatty liver can be avoided by drinking alcohol.
E. Drinking softdrinks with an empty stomach can help
digest food.
For items 13-16. Compare meiosis and mitosis using
the template below. Choose your answer from the
choices below.
Mitosis
Meiosis
13.
14.
15.
16.
a. Makes gametes
b. Makes Body Cells
c. 4 non-identical daughter cells
d. 2 identical diploid daughter cells
17. In what stage of meiosis does the actual
reduction of chromosome number occur?
a. Anaphase 1
c. Telophase 1
b. Anaphase 2
d. Telophase 2
18. Meiosis is important for the preservation of
species and for _______ .
a. Variation
c. reproduce
b. Growth
d. improvement
For items 19-20. Read the sentences or ideas below.
Fill in the black with the correct word to complete
the idea.
Meiosis is a specialized type of cell division that
19. __________
reduces the (19)________ (chromosome, chromatin)
20.
___________
number
by half, creating four (20)________ (haploid,
diploid) cells which are genetically distinct from the
parent cell.
21. During gamete formation, the pair of genes
separate from each other. This is stated in what
Mendelian law?
a. co-dominance c. independent assortment
b. dominance
d. segregation
22. What does the law of dominance says?
a. trait is expressed more when present in
heterozygous form than in homozygous form.
b. Recessive traits are expressed over dominant
traits.
c. Dominant traits are not expressed not until it is
combined with an allele of the same kind.
d. Dominant traits are expressed whenever it is
present.
23. What is a gene? It is a/an __________.
a. trait that is based on a protein
b. RNA that codes for a protein
c. protein that leads to a trait
d. DNA segment that codes for a certain
protein/trait
24. What is an allele? It is a __________.
a. variant form of a given gene
b. segment of a given chromosome
c. point that connects two sister chromatids
d. locus in a gene
For item 25-28. Choose the answer from the box.
a. species
c. Carl Linnaeus
27. The one who devised the binomial system of
naming organisms is ____________
28. Scientific name have two important parts, the
_____________ name and the species name.
29. What domain represents organisms whose cell
wall composition is different from the usual and is
considered to be ancient?
a. archaea
c. eukarya
b. eubacteria
d. protista
30. What kingdom is characterized of organisms
whose cell walls have peptidoglycans and
carbohydrates?
a. archaea
c. eukarya
b. eubacteria
d. protista
31. An endangered species is a type of organism
that is threatened to become extinct.
a. True
b. false
32. Species become endangered for two main
reasons: loss of habitat and loss of genetic
variation.
a. True
b. false
33. What form of energy is released to the biosphere
when one eat something?
a. chemical energy
c. light
b. heat
d. mechanical energy
34. Water cycle cannot take place in the absence
of what element?
a. human
c. sun
b. moon
d. trees
35. What do you call the conversion of liquid water
in plant leaves into water vapor?
a. condensation
c. precipitation
b. evaporation
d. transpiration
36. When plants and animals die, they are
decomposed and the decomposers perform the
process called ___________ releasing the nitrogen
back into the air.
a. Ammonification
c. evaporation
b. Denitrification
d. condensation
For items 37-40. Place a check mark if the given
practice minimizes negative impact of humans to
the environment and x if it does not.
Human Activities
/ or x
37. Hunting Butandings
(Whale Shark)
38. Organic Farming
39. Land conversions
40. Use of Solar Energy
Prepared by:
b. biodiversity
d. genus
25. A group of individuals that interbreed in nature is
called ____________.
26. The diversity of animals and plants present in a
community is called ____________.
MARY JANE B. LAGANG
SST I
June 22, 2023