Two chromatids are connected by a 

A. centromere.
B. spindle.
C. centriole.
D. chromosome.


A. centromere.

Biology & Microbiology

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Diploid (2n) cells in the ____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores

Fill in the blank with the appropriate word.

Biology & Microbiology

Genetic variation can originate both from the production of new alleles and from the arrangement of

existing alleles.

Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following is an aggregate fruit?

a. peas b. acorns c. pineapples d. strawberries e. cherries

Biology & Microbiology

Plasmid cloning vector DNA is usually introduced into bacterial hosts by ________.

A. ligation B. transformation C. plasmolysis D. transduction

Biology & Microbiology