During which phase of meiosis do synapsis and crossing over occur

Carries blood from lower part of body to right atrium

A student is performing a gram stain of a mixed culture of both e. coli and s. aureus and he forgets to decolorize with ethanol. what should his slide look like?

Which component in a graph indicates an independent factor? A. Y-axis X-axis C. Scale Rese

What causes the difference between different STR alleles

Sponges have no nerve tissue or sense organs. explain why this means that sponges have no cephalisation.

A scientist is trying to determine which clade an organism best fits into based on its characteristics. He has determined that the organism must belong to either the clade of bacteria or fungi.

The tiny bodies within cells that supply essential energy for function, growth, and repair are known as:

Henry's economy is classified as a secondary sector economy. Which could be the most important occupation in Henry's country? a. hunting b. retail c. mining d. food processing

Which of the following is not a renewable resource? A. Wind B. Trees C. Corn D. Gasoline

Elizabeth was studying the history of the cell theory and the contributions of different scientists. She made this table to compare two of the scientists.