BIOLOGY

  • ANIMAL HORMONES
    BIOLOGY

    ANIMAL HORMONES

    Animal hormones are chemical messengers produced by various glands and tissues in animals that regulate physiological processes and behaviors. These hormones are secreted into the bloodstream and carried to target organs or tissues, where they bind to…

  • REPRODUCTIVE SYSTEMS IN MAMMALS
    BIOLOGY

    REPRODUCTIVE SYSTEMS IN MAMMALS

    Mammals are biparental in reproduction that is sexual reproduction involves two distinct and separate individuals, sexually mature male and female.   A) Male reproductive system The male reproductive system in man consists of testes (singular = testis),…

  • EVIDENCES IN SUPPORT OF ORGANIC EVOLUTION
    BIOLOGY

    EVIDENCES IN SUPPORT OF ORGANIC EVOLUTION

    1) Evidence from comparative anatomy Homologous structures can be used to explain the evidence of comparative anatomy. Homologous structures are those structures which are built in the same common plan but yet modified to perform different functions.…