A paleobotanist studies tree rings to determine the history of an area. True False

How do trees know when to shed their leaves

The brain is a spongy organ made up of nerve and supportive tissues. It is protected by the skull. The base, or lower part of the brain is connected to the spinal cord at the brain stem.

Which animals are amnitoes

True or false? The smaller a cell is, the more difficult it is for the cell to move enough materials across its cell membrange.

What effect does human activity have on many ecosystems? It increases recycling. It attracts rodents. It decreases pollution. It destroys habitats.

Excessive use of fertilizers has little impact on aquatic life. Explain.

When conducting an experiment on how stimuli are represented by the firing of neurons, you notice that neurons respond differently to different faces.

Inferring on the Galapagos island, Darwin discovered birds with differently shaped beaks. What might this tell you about the eating habits of birds? Explain.

Diseases caused by errors during meiosis and why?

Kelly hypothesizes that if she waters a fig tree seedling, it will grow twice as fast as an unwatered seedling. Which of the following steps would compromise her experiment? 1. Plant two fig tree seedlings of the same age 2.