Ejercicios de práctica 1. ¿Cómo se llama la molécula que contiene la información genética en todos los
seres vivos?
2. ¿De qué están formados los cromosomas?
3. El ADN está formado por unas subunidades denominados
4. ¿De qué está compuesto los nucleótidos?
5. Menciona las 4 bases de un nucleótido y anota al lado la letra que la representa
a.
b.
C.
d.
6. ¿Qué forma tenía el modelo de ADN de James Watson y Francis Crick?

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

oak trees? ? what was listed

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.