1. A qué capa de la atmosfera se refieren las siguientes afirmaciones : a) la mayoria de los pequeños meteoritos que llegan a la Tierra se desintegran en esta capa de la atmosfera. b) La capa de ozono nos protege frente a la radiación ultravioleta.

Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. However, the child may have a sibling that does not have freckles. Which statement best describes the presence of freckles? 1.

What tissue in plants is similar to animal organs?

As resources in a population become less available, the population a. declines rapidly. b. increases slowly. c. reaches carrying capacity. d. enters a phase of exponential growth.

Which term best describes clusters of light-absorbing pigments? Photosystems Grana Thylakoids Chlorophylls

In shady areas of forests, why do the plants have large leaves?

If there is a possibility of four different genotypes in the offspring that result from a dominant-recessive inheritance, and if the couple has four children, would they definitely have children with one expressing each genotype?

The ovaries are located in the ___ cavity.

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.