Pasteur's experiments proved that
A) Cells cannot survive in swan necked flasks
B) In order to grow, cells need to be supplied with oxygen
C) Spontaneous generation can only occur if nutrient broth is left open to the environment
D) Sterilizing nutrient broth prevents spontaneous generation
E) Pre-existing cells present in the air can grow in sterilized nutrient broth
Answer: E
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The cytoskeleton and motor proteins are important for which of the following processes?
A. cell motility B. whipping motion of sperm flagella C. movement of amoeba by lamellopodia D. muscle contraction E. All of the choices are correct.
An unusual red sponge is discovered near a deep-sea vent. You want to determine if this is a new species of sponge, so you separate the cells for further study. A new lab assistant accidentally adds cells from a blue sponge to your preparation while you are at lunch. When you return, you find that the sponge cells have reaggregated into a multicellular organism. What do you see if the red and blue sponges are the different species?
A. one sponge with a red side and a blue side B. one blue sponge and one red sponge C. one sponge with blue and red randomly distributed D. one purple sponge (mix of red and blue colors) E. one sponge with alternating red and blue layers of cells
The veins of leaves are used for ____
a. support b. identification c. transport of water and nutrients d. detachment in the autumn e. regeneration
Please explain why allele frequencies have no impact on change in the value of linkage disequilibrium between two loci in a Hardy–Weinberg population
What will be an ideal response?