Once the fertilized ovum has divided into two cells, it is called the ________

Fill in the blank(s) with correct word


pre-embryo

Biology & Microbiology

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In order to take up a naked DNA molecule, a cell must be ________, which may occur only at certain stages in the life cycle of the organism.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The number of individuals of the same species

in some specified area or volume of habitat is the

a. population density. b. population growth. c. population birth rate. d. population size. e. carrying capacity

Biology & Microbiology

As the degree of environmental heterogeneity of a community increases, the number of plant and animal species tends to

A) decrease. B) remain the same. C) increase. D) increase initially and then decrease.

Biology & Microbiology

All of the following are characteristics of life EXCEPT

A. evolution. B. reproduction. C. homeostasis. D. multicellularity.

Biology & Microbiology