IB Biology Unit 5 - EVOLUTION Exam / Revised Questions and Answers / Sure A
1 view 0 purchase
Course
IB Biology Unit 5 - EVOLUTION
Institution
IB Biology Unit 5 - EVOLUTION
adaptations - characteristics that make an individual suited to its environment and way of life...
can be:
Structural: Physical differences in biological structure
Behavioural: Differences in patterns of activity
Physiological: Variations in detection and response by vital organs
Biochemical: ...
IB Biology Unit 5 - EVOLUTION Exam /
Revised Questions and Answers / Sure
A+
adaptations - characteristics that make an individual suited to its environment and way of life...
can be:
Structural: Physical differences in biological structure
Behavioural: Differences in patterns of activity
Physiological: Variations in detection and response by vital organs
Biochemical: Differences in molecular composition of cells and enzyme functions
Developmental: Variable changes that occur across the life span of an organism
adaptive radiation - the rapid evolutionary diversification of a single ancestral line based on
different environmental conditions
ex: the beaks of the finches on Galapagos islands
Angiospermophyta (plant phylum) - Has vascularisation
Have leaves, roots and stems (individual species may be highly variable in structure)
Reproduce by seeds produced in ovules within flowers (seeds may develop in fruits)
Examples include all flowering plants and grasses
Annelida (animal phylum) - Have bilateral symmetry
Have a separate mouth and anus
Have internal cavity with blood vessels
Body composed of ringed segments with specialisation of segments
Examples include earthworms and leeches
, Archaea (domain) - prokaryotic cells lacking a nucleus and consist of the extremophiles (e.g.
methanogens, thermophiles, etc.)
Arthropoda (animal phylum) - Have bilateral symmetry
Have a separate mouth and anus
Have jointed body sections / appendages and have a hard exoskeleton made with the protein chitin
Segmented bodies with legs or other appendages with joints
Examples include insects, crustaceans, spiders, scorpions and centipedes
binomial nomenclature - Genus is written first and is capitalised (e.g. Homo)
Species follows and is written in lower case (e.g. Homo sapiens)
Some species may occasionally have a sub-species designation (e.g. Homo sapiens sapiens - modern
man)
biological evolution - a change in the allele frequency of a population's gene pool over successive
generations
Bryophyta (plant phylum) - Has no vascularisation (i.e. lacks xylem and phloem)
Has no 'true' leaves, roots or stems (are anchored by a root-like structure called a rhizoid)
Reproduce by releasing spores from sporangia (reproductive stalks)
Examples include mosses
Chordata (animal phylum) - Have bilateral symmetry
Have a separate mouth and anus
Have a notochord and a hollow, dorsal nerve tube for at least some period of their life cycle
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Lucindajohns. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
