zCh 2

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_____ promotes an organism's survival in the natural habitat

adaptive behavior

What is an example of adaptive behavior that favors infant survival in humans?

attachment to caregiver

in terms of biological beginnings, which of the following occurs LAST?

cell division in the zygote

The threadlike structures that come in 23 pairs carrying the hereditary info necessary for cells to reproduce themselves are called _____

chromosomes

extra copy of chromosome 21?

down syndrome

____ psychology is the newest approach to psychology and emphasizes the importance of adaptation, reproduction, and survival of the fittest in shaping behaviors.

evolutionary

What unit of hereditary information is composed of short segments of DNA?

genes

____ help cells to reproduce themselves and to assemble proteins

genes

___ is a specialized form of cell division that occurs to form eggs and sperm

meiosis

an X linked disease is more likely to harm ____

men

environmental agents such as radiation, errors in cellular machinery, and chance can all lead to a ____ gene

mutated

As the environment changes, some species adapt in a way that helps them survive and reproduce, while other species do not adapt well and die. This process is called?

natural selection

____ is the complete set of developmental instructions for creating proteins that initiate the making of a human organism

the human genome

what is formed when fertilization occurs?

zygote


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