What is the significance of secondary tissues?

What is the name of the cell that divides to form an embryo

Figure 17-3 shows smaller and larger beaks in a population of finches. One group of birds has a short, parrot-like beak and another group has a long, narrow beak. What process has probably occurred?

Jenna falls asleep suddenly, when she is trying to do other things. Which sleep disorder does Jenna probably have?

Discuss the effect of latitude on the intensity and duration of sunlight

a scientist has discovered a new plant species in the amazon rainforest. she tells her fellow scientists that the plant she has found produces a cone. what might they say about how this planet is different from an angiosperm

Describe the events that occur during mitosis

Why would engulfing these smaller prokaryotic cells be an advantage to the larger prokaryotic cells? A) The smaller prokaryotic cell would be protected by the larger cell.

All cells have the same genetic information, but do not express the same genes. How is this possible? a. The differences are due to gene expression, which can be turned on and off. b.

Why must organisms of the estuary be adapted to varying levels of salinity? A. Fresh river water flows into the estuary B. Saline ocean water flows into the estuary C. Ocean tides increase and decrease the amount of ocean water D. All of the above

Which description shows competition in an environment? a three organisms battling over limited resources b an organism that feeds on some food c an organism that finds a place to sleep d three organisms of the same species living in an area