BIO 203 LAB PRACTICAL 2 TEST PAPER
FULL SOLUTION QUESTIONS AND
CORRECT ANSWERS GRADED A+
●● What is the interpretation of a significant p-value in regression
analysis?
Answer: It suggests that there is a relationship between the explanatory
(X) and response (Y) variables.
●● What does R² represent in regression analysis?
Answer: R² is a measure of how well the regression line fits the data,
ranging from 0 to 1.
●● What is the significance of a p-value in hypothesis testing?
Answer: It measures how likely the results are to be due to chance alone,
compared against an alpha level.
●● What is the typical alpha (α) level used in hypothesis testing?
Answer: 0.05, but it can be adjusted to 0.1 or 0.01 depending on the
context.
●● What does a non-significant p-value indicate?
,Answer: It may be more informative than a significant result, indicating
that an expected outcome did not occur.
●● What is the alternation of generations in life cycles?
Answer: It refers to the alternation between multicellular haploid and
diploid stages in plants and fungi.
●● How do land plants differ in their life cycles compared to animals?
Answer: Land plants can be multicellular in both haploid and diploid
stages, while most animals are multicellular only as diploids.
●● What are the two multicellular generations in Basidiomycota fungi?
Answer: Haploid mycelium and dikaryotic mycelium.
●● What is the primary composition of mollusk exoskeletons?
Answer: Calcium carbonate.
●● What type of plant cell is dead at maturity and has a secondary cell
wall?
Answer: Sclerenchyma.
●● What adaptations do aquatic organisms have for support?
Answer: They must resist water currents.
, ●● What adaptations do terrestrial organisms have for support?
Answer: They must resist gravity and wind.
●● What are the three types of skeletons found in animals?
Answer: Endoskeletons, exoskeletons, and hydrostatic skeletons.
●● What is a hydrostatic skeleton?
Answer: A support system where muscles push against a fluid-filled
body cavity.
●● What materials are commonly found in biological structures for
support?
Answer: Chitin, cellulose, and bone.
●● What is the role of spicules in sponges?
Answer: They provide structural support and are made of calcium
carbonate or silica.
●● What is the significance of spongin in sponges?
Answer: It is a specialized protein that provides support in addition to
spicules.
FULL SOLUTION QUESTIONS AND
CORRECT ANSWERS GRADED A+
●● What is the interpretation of a significant p-value in regression
analysis?
Answer: It suggests that there is a relationship between the explanatory
(X) and response (Y) variables.
●● What does R² represent in regression analysis?
Answer: R² is a measure of how well the regression line fits the data,
ranging from 0 to 1.
●● What is the significance of a p-value in hypothesis testing?
Answer: It measures how likely the results are to be due to chance alone,
compared against an alpha level.
●● What is the typical alpha (α) level used in hypothesis testing?
Answer: 0.05, but it can be adjusted to 0.1 or 0.01 depending on the
context.
●● What does a non-significant p-value indicate?
,Answer: It may be more informative than a significant result, indicating
that an expected outcome did not occur.
●● What is the alternation of generations in life cycles?
Answer: It refers to the alternation between multicellular haploid and
diploid stages in plants and fungi.
●● How do land plants differ in their life cycles compared to animals?
Answer: Land plants can be multicellular in both haploid and diploid
stages, while most animals are multicellular only as diploids.
●● What are the two multicellular generations in Basidiomycota fungi?
Answer: Haploid mycelium and dikaryotic mycelium.
●● What is the primary composition of mollusk exoskeletons?
Answer: Calcium carbonate.
●● What type of plant cell is dead at maturity and has a secondary cell
wall?
Answer: Sclerenchyma.
●● What adaptations do aquatic organisms have for support?
Answer: They must resist water currents.
, ●● What adaptations do terrestrial organisms have for support?
Answer: They must resist gravity and wind.
●● What are the three types of skeletons found in animals?
Answer: Endoskeletons, exoskeletons, and hydrostatic skeletons.
●● What is a hydrostatic skeleton?
Answer: A support system where muscles push against a fluid-filled
body cavity.
●● What materials are commonly found in biological structures for
support?
Answer: Chitin, cellulose, and bone.
●● What is the role of spicules in sponges?
Answer: They provide structural support and are made of calcium
carbonate or silica.
●● What is the significance of spongin in sponges?
Answer: It is a specialized protein that provides support in addition to
spicules.
