CHAPTER 5 Flashcards
Who proposed the sociobiological evolutionary perspective?
E. O. Wilson
(1975)
What is the full name of E.O. Wilson?
Edward
Osborne Wilson
He is an American biologist recognized as the world’s leading authority on ants.
Edward
Osborne Wilson
What is the study of the genetic basis of the social behaviour of all animals? including humans.
sociobiology
It is the view of human development that focuses on evolutionary and biological bases of behavior.
Evolutionary/sociobiological Perspective
According to him, species have developed through the related processes of survival of the fittest and natural selection
Darwin
Individuals with ______ ______ fitted (better adapted) to their environments survive and reproduce more than those that are less fitted (less well adapted).
heritable traits
E. O. Wilson defined this as “the extension of population biology and evolutionary theory organization”
sociobiology
It is the process by which sperm and ovum—the male and female gametes, or sex cells—combine to create a single cell called a zygote, which then duplicates itself again and again by cell division to produce all the cells that make up a baby.
Fertilization, or conception
What is a zygote?
Fertilized egg cell or ovum
In humans, the conception process begins with ______, when an ovum, or egg (the largest cell in the human body), which has been stored in one of the mother’s two ovaries, matures and is released into the fallopian tube.
ovulation
Within several hours of conception, half of this from the
egg and half of this from the sperm fuse together, creating a zygote—a fertilized ovum.
23 chromosomes
Once the zygote attaches to the wall of
the uterus, it is known as the?
embryo
During the embryonic phase, which will last for the next six
weeks, the _____ internal and external organs are formed, each beginning at the microscopic level, with only a few cells
major
This is the fluid-filled reservoir in which the embryo (soon
to be known as a fetus) will live until birth, and which acts as both a cushion against outside pressure and as a temperature regulator.
amniotic sac
It is an organ that allows the exchange of nutrients
between the embryo and the mother, while at the same time filtering out harmful material.
The placenta
This inks the embryo directly to the placenta and transfers all material to the fetus.
The umbilical cord
This protects the fetus from many foreign agents in the mother’s system that otherwise pose a threat.
placenta and the umbilical cord
Beginning in the ____ ______ after conception, the embryo becomes a fetus.
ninth week
The fetus begins to take on many of the characteristics of a human being, including moving (by the _____ ______, the fetus is able to curl and open its fingers, form fists, and wiggle its toes), sleeping, as well as early forms of swallowing and breathing.
third month
The fetus begins to develop its senses, becoming able to
______________________________. Research has found that the fetus even develops some initial preferences.
distinguish tastes and respond to sounds
Body cells of women and men contain __ _____ of chromosomes, which carry the genes.
23 pairs
basic units of inheritance.
Genes
Each sex cell (ovum and sperm) has only 23 single chromosomes because of a special kind of cell division
meiosis
It is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes
Meiosis