Biodiversity and Extinction

Question 1

____ Describes the variety of species
in an ecosystem and the essential ____of all life forms.

The number of species in an area described as ____.

Answer 1

interdependence

species richness

Question 2

Species richness tends to be higher near the ____

_____ have the highest biodiversity.

Answer 2

equator

Tropical Rainforests

Question 3

Three types of biodiversity:

Answer 3

Diversity of Species

Diversity of Ecosystem

Diversity of Genes

Question 4

Diversity of Species
Defined as the number of different species
present in a place and ____ of
each of those species.

Diversity of Ecosystem
Defined as the variety of different habitats,
communities and ___.

Diversity of Genes
Describes the total number of different ____ found within a species.

Answer 4

relative abundance

ecological processes

alleles

Question 5

Importance of Biodiversity (4)

Answer 5

Protects against climate

Ensures Food Security

Fights Disease

Supports Communities

Question 6

___ complete disappearance of a species from Earth

Usually occurs at a slow rate but usually after a ____

Answer 6

Extinction

Catastrophic event

Question 7

a short period of geological time in which a high percentage of biodiversity dies out.

Answer 7

Mass extinction

Question 8

The Mass Extinctions (5)

Answer 8

Ordovician - Silurian period

Devonian Period

Permian - Triassic Period

Triassic - Jurassic Period

Cretaceous - Paleogene Period

Question 9

The Mass Extinctions date:

Ordovician - Silurian period

Devonian Period

Permian - Triassic Period

Triassic - Jurassic Period

Cretaceous - Paleogene Period

Answer 9

Ordovician - Silurian period
443 MYA

Devonian Period
374 MYA

Permian - Triassic Period
250 MYA

Triassic - Jurassic Period
200 MYA

Cretaceous - Paleogene Period
66 MYA

Question 10

The Mass Extinctions death rate:

Ordovician - Silurian period

Devonian Period

Permian - Triassic Period

Triassic - Jurassic Period

Cretaceous - Paleogene Period

Answer 10

Ordovician - Silurian period
85%

Devonian Period
70%

Permian - Triassic Period
95%

Triassic - Jurassic Period
76%

Cretaceous - Paleogene Period
80%

Question 11

Factors that can contribute to mass extinction (5)

Answer 11

Changes in Sea Levels

Continental Movement

Geologic events like volcanic eruption

Global warming and cooling

Meteor Impact

Question 12

Refers to the rate at which species are disappearing from the Earth.

It is often expressed as:

Answer 12

Extinction Rate

extinctions per million species per year (E/MSY)

Question 13

Species at risk classifications (3)

The species is extinct from an ecosystem, but exist elsewhere.

Species is facing extinction/extirpation

Species is at risk of being endangered if factors are not changed.

Answer 13

Extirpated

endangered

threatened

Question 14

Over 98% of the species that have ever existed are extinct according to ____

Answer 14

Begum

Question 15

Number of endemic species threatened with extinction in the Philippine archipelago according to BirdLife International

Answer 15

93 (36%) endemic species

Question 16

____ of the genetic diversity of plants have been lost

___ species per hour are going extinct with ___ extinctions occuring per year

___ of the world’s coral reed systems are degraded or destroyed

___ of mammals and ___ of bird species are globally threatened

____ of the world’s wetlands have been drained and an equal amount of species in wetlands have declined

Answer 16

75%

3
20000

1.3

24%
12%

50%

Question 17

Current amount of endangered species at 2022

Most species going extinct is the group of ___

Answer 17

16 900

Fish

Question 18

Best known endangered species in the philippines (9)

Answer 18

Philippine Eagle

Tamaraw

Philippine Crocodile

Walden’s Hornbill

Net Coral

Visayan Warty Pig

Tarsier

Philippine Forest Turtle

Negros Bleeding-Heart

Question 19

Philippine Eagle scientific name

Answer 19

Pithecophaga jefferyi

Question 20

Other name of the Philippines:

as declared by ___

Answer 20

Pearl of the Orient Sea

Biance Ferrer

Question 21

Philippines is among the mega-biodiverse countries which accounts for ___ of the earth’s biodiversity and ___ plant and animal species can be found in the archipelago with half being endemic

There are also ___ Key Biodiversity Areas

Answer 21

2/3

53 000

228

Question 22

Philippines has lost ___ of its original forest cover since the 1900s and ____ hecrares of forest cover are lost annually

Answer 22

93%

47 000

Question 23

in 2013, DENR identified ____ threatened plant and animal species while ___ plant species were further classified

Answer 23

700

984

Question 24

Natural causes of extinction (4)

Answer 24

Natural Disasters

Competition

Disease

Climate Change

Question 25

Anthropogenic causes of extinction (8)

Answer 25

Pollution

Overexploitation

Habitat Destruction and Fragmentation

Invasive Species

Habitat Degradation

Illegal Wildlife Trade

Overharvesting of Resources

Agricultural Practices

Question 26

Conservation to mitigate Extinction (5)

Answer 26

Legislation and Regulation

Education and Awareness

Monitoring and Research

Breeding and Reintroduction Programs

Legally Binding Agreements