The nucleus of an atom is composed of

A. protons.
B. neutrons.
C. electrons.
D. protons and neutrons.
E. protons and electrons.


D. protons and neutrons.

Biology & Microbiology

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The gradient distributions of alleles across continents reflect _____

a. the delineation of new races b. genetic drift c. human migration patterns d. protective alleles e. natural selection

Biology & Microbiology

An animal with a diploid number of 36 chromosomes will have ____ chromosomes in its gametes and ____

chromosomes in its somatic cells. a. 18; 18 b. 18; 36 c. 36; 18 d. 36; 36 e. 36; 72

Biology & Microbiology

A peptide bond forms between which of these groups?

A) Carboxyl and amino B) Phosphate and hydroxyl C) Hydroxyl and carboxyl D) Carboxyl and aldehyde E) Amino and aldehyde

Biology & Microbiology

Membranes of some thermophilic Archaea are stabilized by ether linked phospholipids.

Answer the following statement true (T) or false (F)

Biology & Microbiology