Chapter 1 Flashcards
Species
A group of organisms that can breed together to produce a fertile offspring
Anthropoids
Segmented animals with jointed legs and an exoskeleton
Four classes of anthropoids
Crustaceans, Myriapods, Insects and arachnids
Binomial name system
Genus + Species
5 Classes that vertebrates are classed in
Fish, Amphibians, Reptiles, Birds, Mammals
Viruses are
not cells, but a few genes inside a protein coat. They are parasites that enter host cells and force them to make new viruses. They do not respond to antibiotics
Dicotyledons
Flowering plants where leaves have branching veins. They have two cotyledons (seed leaves) in each seed
Monocotyledons
Grasses. Their leaves have parallel veins. They have one cotyledon (seed leaf) in each seed.
Dichotomous keys are used for
identifying organisms
Asexual reproduction
results in genetically identical offspring from one parent
Sexual reproduction
involves the fusion of male and female nuclei in o for a zygote, producing offspring that are genetically different from parents and each other
Disadvantages of asexual reproduction
No variation in offspring meaning that a disease that affects one of them, is likely to affect all.
It usually means that the offspring grow in the same space, meaning there is competition for resources
Advantages of asexual reproduction
It allows organisms to reproduce fast and don’t rely on other organisms
Female sex organs in flowering plants
Carpels
Stamens
Make sex organs in flowering plants
