E&B: Classification

Question 1

Characteristics of angiospermephyta?

Answer 1

Has vascularisation
Have leaves, roots and stems
Reproduce by seeds produced in ovules within flowers.

Question 2

Examples of angiospermephyta

Answer 2

All flowering plants and grasses.

Question 3

Characteristics of bryophyta?

Answer 3

Has no vascularisation (lacks xylem and phloem)
Had no true leaves, roots or stems (anchored by root like structure, rhizoid)
Reproduce by releasing spores from sporangia (reproductive stalks)

Question 4

Examples of bryophyta?

Answer 4

Mosses and liverworts

Question 5

Characteristics of filicinophyta?

Answer 5

Has vascularisation
Have leaves (pinnate) , roots and stems
Reproduce by releasing spores from clusters called sori on the underside of the leaves.

Question 6

Examples of filicinophyta?

Answer 6

Ferns

Question 7

Examples of coniferophyta?

Answer 7

Pine trees and conifers

Question 8

Kingdom Animalia

Question 9

Characteristics and examples of porifera?

Answer 9

Asymmetrical
No body cavity
No segmentation
Spicules for support

Example: Sea sponge

Question 10

Characteristics and examples of cnidaria?

Answer 10

Radial symmetry
Mouth but no anus
No segmentation
Stinging cells

Example: Jellyfish, coral

Question 11

Characteristics and examples of platyhelminthes?

Answer 11

Bilateral symmetry
Mouth but no a anus
No segmentation
Flattened body

Examples: Tapeworm, planaria

Question 12

Examples and Characteristics of annelida?

Answer 12

Bilateral symmetry
Mouth and anus
Segmented
Move via peristalsis

Eg? Earthworms and leech

Question 13

Examples and Characteristics of mollusca?

Answer 13

Bilateral
Mouth and anus
Nonvisible segmentation (mantle and foot)
May have a shell(made by mantle)
Eg? Snail, octopus, squid

Question 14

Examples and Characteristics of anthropoda?

Answer 14

Examples and Characteristics of anthropoda?
Bilateral
Mouth and anus
Segmented
Have exoskeleton (made of chitin)

Eg? Insects, spiders, crustaceans

Question 15

Examples and Characteristics of chordata?

Answer 15

Bilateral
Separate Mouth and anus.
Have a notochord and a hollow dosal for at least some period of their lifetime.

Eg? Mammals, birds, amphibians, fish

Question 16

Types of clasfications

Question 17

What is artificial Classification

Answer 17

involves arbitrarily selecting unifying Characteristics first and then grouping organisms accordingly.

Question 18

What is the advantage and disadvantage of artificial Classification?

Answer 18

The advantage is that such schemes are easy to develop and relatively stable (unlikely to change)
The disadvantage is that they do not generally show evolutionary evolutionary relationships.

Question 19

What is natural Classification?

Answer 19

Involves grouping organisms based on similarities first and then identifying shared characteristics.

Question 20

Advantage and disadvantage of natural Classification?

Answer 20

Natural Classification schemes can be used to predict characteristics led by species within a group.

A disadvantage is that they are highly mutable and tend to change as new information is discovered.

Question 21

What is phylogenetic Classification?

Answer 21

Differentiates organisms based on genetics.
Organisms who share a greater level of homology in their dna or amino acid sequences are expected to be more closely related.

Question 22

What is speciation?

Answer 22

the evolutionary by which populations evolve to become distinct species.

Question 23

What is molecular clock?

Answer 23

Is a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged.