Bracnhes Of Biology
Want to ask a question ?
Latest Posts
Ethology
Definition Ethology, which is the comparative study of behavior from an evolutionary perspective, often deals with the drives relating to feeding, sex, care of young, etc. These drives are apparently motivations that spring from a disturbance in the internal equilibrium of an animal. They are modified factors either internal or present in the environment Read more about Ethology[…]
Sex Determination
The genetic determinant of sex is located on the Y chromosome (Sex Determination) Examination of human chromosomes reveals a consistent difference between the sexes in karyotype (or pattern of chromosomal morphologies). Thus, the human has 46 chromosomes, 22 pairs of autosomes and one pair of sex chromosomes (Figure 1). Human females, and indeed all female Read more about Sex Determination[…]
Reproductive Hormones
In this article, you will be introduced to many reproductive messengers, but here we focus on a few key hormones. We start with the sex steroid, which are the central players in reproduction. Here, a more detailed account of this family is given. The sex steroids These steroids make up a large group of molecules Read more about Reproductive Hormones[…]
21 Questions with Answers on Primates Basic Knowledge and Quiz with Answers
What characteristics of primates place them in the subphylum Vertebrata? All vertebrates possess a vertebral column surrounding the spinal cord and a true complex brain surrounded a cranium. This situation applies to all extant primates. Vertebrates also possess a postanal tail. All primates either possess such a tail [which actually serves as a grasping Read more about 21 Questions with Answers on Primates Basic Knowledge and Quiz with Answers[…]
26 Basic Questions with Answers and Quiz related to Kingdom Plantae
What is the evidence that all plants arose from the Chlorophyta (green algae)? All plants share with the chlorophytes the presence of both chlorophyll a and chlorophyll b. They also all contain 3-carotene as an accessory photosynthetic pigment. In almost all cases, starch is the principal storage carbohydrate. Unlike the fungi, chlorophytes and plants have Read more about 26 Basic Questions with Answers and Quiz related to Kingdom Plantae[…]
Primates
The immediate ancestors of present-day primates were probably a group of relatively nondescript (in human terms) msectivores that looked like the tree shrews. The primates (“of first rank”) were named humans, who naturally regarded their order of mammals as the most important. If mice or rats were doing the taxonomy, then rodents would probably Read more about Primates[…]
Human Reproductive System
Human Reproductive System At the core of sexual reproduction lies the creation and fusion of the two types of gamete. the female oocyte. the male spermatozoon. Production of Gametes Their production occurs in distinctive female and male gonads: the ovary and testis. Male Reproductive Organ Thus, the human male develops obvious external genitalia and a Read more about Human Reproductive System[…]
Kingdom Fungi
Characteristics of Fungi Fungi are placed in a separate kingdom on the basis of several distinct characteristics. They are all eukaryotic, heterotrophic, and, except for yeasts, multicellular (or multinucleate). They obtain their food absorption rather than ingestion. They secrete their digestive enzymes outside their bodies and then absorb the products of digestion produced Read more about Kingdom Fungi[…]