Which group of invertebrate taxa is sessile and processes double layered body wall with numerous pores?
Biology_2019_STPM term 3_Objectives

Quiz
•
Biology
•
12th Grade
•
Medium
Loh Jane
Used 3+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Arthropoda
Cnidaria
Mollusca
Porifera
Answer explanation
Porifera are sessile multicellular organisms that have porous bodies where water moves in and out of them. Their body wall is divided into two layers with a central mesophyll. Porifera are sponges with unspecialised cells.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Malaysia, poaching of tigers has reduced their population significantly. This causes negative impacts on the interactions between populations of different species such as mousedeer and wild boar.
Based on the statement above, which level of biodiversity is affected?
Ecosystem diversity
Genetic diversity
Population diversity
Species diversity
Answer explanation
Species diversity is the number of different species in a community. It refers to the number of each species and its abundance in a population. This diversity affects their relationship with one another.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ⅰ and Ⅲ
Ⅰ and Ⅳ
Ⅱ and Ⅲ
Ⅱ and Ⅳ
Answer explanation
In the phosphorus cycle, phosphorus is found in rocks as inorganic phosphate. Water erodes the rock surface and carries inorganic phosphate into the soil. Decomposition release dissolved phosphate into water.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an experiment, a student rears some guppy fish in a small natural pond. The student gives the fish sufficient food and maintains good water quality. After a period of time, the population of fish stops increasing.
The population of guppy fish does not increase due to
sexual selecction
space limitation
intra-specific competition
toxic waste products accumulation
Answer explanation
Intraspecific competition is an interaction of competition in between individuals of the same species. The individuals of the same species occupy the same niche and compete for exactly the same resources.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Results of a field study on the density of Mimosa sp. using 50 cm × 50 cm quadrats are given in the table.
What is the density of Mimosa sp. per m2?
4
16
40
160
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which population will show a J-shaped growth curve?
Ⅰ. A squirrel population in a stable tropical rainforest.
Ⅱ. A small herd of elephants relocated into a protected national park.
Ⅲ. Replants mangroves trees in Matang Mangroves Forest Reserve, Perak.
Ⅳ. A seal population rebounds after large numbers were killed by a disease.
Ⅰ and Ⅲ
Ⅰ and Ⅳ
Ⅱ and Ⅲ
Ⅱ and Ⅳ
Answer explanation
J-shaped growth curve is where the population density of an organism in an environment increases rapidly in an exponential form. The population stops abruptly due to environmental resistance and population size drops suddenly.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a small community, marriage never occurs with members outside their own immediate community. As a result, they are genetically unique and their gene frequencies are different from other populations.
Which are true about the genetic uniqueness of the population?
Ⅰ. Bottleneck effect
Ⅱ. Founder effect
Ⅲ. Genetic drift
Ⅳ. Sexual selection
Ⅰ and Ⅱ
Ⅰ and Ⅳ
Ⅱ and Ⅲ
Ⅲ and Ⅳ
Answer explanation
Sexual selection is a mode of natural selection in which members of one sex choose mates of the other sex to mate. This reduces the gene frequency of the population. As a consequence, sexual selection can lead to the evolution of traits as only the fittest alleles are selected for. The bottleneck effect is a type of drift which greatly reduces genetic diversity. It happens when the size of a population is severely reduced. The allele frequency in the remaining population that increases in size through sexual selection will be different from the original population.
Create a free account and access millions of resources
Similar Resources on Wayground
20 questions
CIE Plant response and reproduction

Quiz
•
12th Grade
17 questions
5.1 How Populations Grow

Quiz
•
9th - 12th Grade
20 questions
Steele HS Ecology Quiz #3

Quiz
•
9th - 12th Grade
13 questions
Germination

Quiz
•
9th - 12th Grade
20 questions
Biology Plant Quiz

Quiz
•
9th - 12th Grade
19 questions
Systems & Interactions (Unit 9) Practice Test

Quiz
•
9th - 12th Grade
19 questions
Asexual vs. Sexual Reproduction

Quiz
•
8th - 12th Grade
14 questions
Interdependence

Quiz
•
KG - University
Popular Resources on Wayground
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
10 questions
Writing and Identifying Ratios Practice

Quiz
•
5th - 6th Grade
36 questions
Prime and Composite Numbers

Quiz
•
5th Grade
14 questions
Exterior and Interior angles of Polygons

Quiz
•
8th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade