Ost significant difference between mitosis and meiosis?
a. Chromosomes are duplicated before mitosis.
b. Meiosis is not followed by cytokinesis.
c. Crossing over occurs in mitosis.
d. A spindle formed of microtubules moves the chromosomes in mitosis.
e. Homologous pairs of chromosomes are split up in meiosis.

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

How do the sperm cells get from the stigma to the ovules?

In 1994, telomerase activity was discovered in human cancer cell lines. although telomerase activity is rarely present in human somatic tissue, this discovery indicated that humans do contain the genes for telomerase proteins and telomerase rna. since inappropriate activation of telomerase may contribute to cancer, why do you think the genes coding for this enzyme have been maintained in the human genome throughout evolution?