Which is a tough and flexible layer that surrounds plant cells, as well as some algal and bacterial cells? cell wall centriole nucleus cell membrane

1. what makes up sides of the ladder of a DNA molecule? 2. how is a RNA different from a DNA? 3. what role does RNA play in cell life 4. what are the three kinds of RNA and what does each do? 5. what can cause mutation?

One direction imagine you have a sore throat. the doctor says it is a bacterial infection. why would you conclude that it is not caused by archaebacteria.

The range of electromagnetic energy emitted by the sun, known as the solar spectrum, is found mostly in three regions of the electromagnetic spectrum. Which type of electromagnetic energy is NOT part of the solar spectrum?

What type of tissue does eczema affect?

The Unopette can be used for: A) Microcollection of blood for culture and sensitivity testing B) Microcollection and dilution of blood samples for the WBC count C) ABO group and type blood collection D) Microcollection of blood for hematocrit

A 14 month old child returns from surgery for an undescended testicle. when planning for the child's discharge, the nurse should remind the parents to observe their child for

How and why does soil and water heat and cool differently and how that affects the air above it

What is the adaptive (natural selection) benefit of the diving response in aquatic and marine mammals? do you think it has an adaptive purpose in humans of is it just a remnant of our evolutionary past?

What happens to the density of the Earth's Layers as you move towards the core of the earth

In humans, what is the results when a valve is leaking blood backward in the heart