Why might it be beneficial to express genes only when they are needed

If a microscope has an ocular with a 5x power and has objectives with powers of 10x and 50x what is the total magnification of a: low power? high power? show math for full credit!

Hemophilia is a disorder in which hemostasis is disrupted. What are some possible errors that could cause this disorder?

What do scientists call a non-native species that reproduces quickly and spreads in an environment when these organisms can cause harm to an ecosystem? A.) A competitive species B.) A displacing species C.) A persistent species D.

The inability of sperm cells to move normally could prevent the production of offspring by interfering with (1) meiosis (3) fertilization (2) mitosis (4) differentiation

In order for a color to be seen by a human, A the light must be traveling slower than usual B in the proper wavelength and frequency range C traveling faster than usual D momentarily stopped

The nucleus is an essential component of all body parts except for?

A gene pool consists of all the genes within a

A scientist want to observe The structure that joins a cell to neighboring cells. How should the scientists observe

The cell cycle consists of A. Mitosis and interphase B. Meiosis and interphase C. Prophase and interphase D. Metaphase and interphase E. changes from a haploid to a diploid state

Why is the theory of abiogenesis just another example of the idea of spontaneous generation?