Natural Selection Reexamined
abidaThe theory of natural selection remains very important in the modern biology. Some phenotypes are more successful. They leave more offspring than the other phenotypes. It is a natural selection.…
POPULATION
sanaThe number of individuals of specie living in the same area at the same time is called population. Population has two aspects: number of individuals of a specie and area…
AND GENE FREQUENCIE
NEW CONCEPT OF EVOLUTION Natural selection operates in two ways: 1 First way: Natural selection at individual level: One way looks at characteristics of individual animals. For example, a bird…
OBJECTIVES OF EVALUATION A HISTORICAL RESPECTIVE
Multiple Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. Comparative anatomy was studied by: (a) Empedocles (b) Darwin …
SUBJECTIVE QUESTION OF EVALUATION A HISTORICAL RESPECTIVE
Discuss theory of acquired character of Lamarck How Geology and fossil evidence do convinced Darwin about evolution. Discuss observation of Darwin in Galapagos Islands. Describe theory of natural selection. Write…
GEOLOGICAL TIME CHART
Era,'Period Age Millions Major Biological events .c.) o N 2 SD 0 Quaternary 0.01 Subtropical forests gave way to cooler forests and grass areas. Tertiary . 65 Modern orders of…
EVIDENCE OF EVOLUTION
BIOGEOGRAPHY The study at the geographic distribution of plants and animals is called biogeography. Biogeographers explain the reason of distribution of organisms in different regions. Biogeographic studies show that life…
Phylum Porifera – Characteristics , Types , Functions & Reproduction
saadiaPHYLUM PORIFERA The Porifera are sponges. They are primarily marine animals. There are nine thousand species of sponges. There are following characteristics of the phylum Porifera: Their bodies consist of…
Brassicacae / cruciperae (Mustard family) Diagnostic characters
sidraCRUCIFERAE (Mustard family) Diagnostic characters Habit: Annual, biennial or perennial herbs Roots: Tap root (fibrous or tuberous) Stem: I lerbaceous. cs indrical. Leaves: Petiolate. alternate, simple, exstipulate, reticulate venation, leaves…