List three structural changes that must occur in young, unmodified plant cells as they develop into xylem tissue.

Ram, a boy living in village of India told his friend Raju that he saw penguin in the river situated near his house. Would you think this adaptation enable them to survive?

Which of the following can be labeled as autotrophs

How is a brain injury classified? A) as an injury of the peripheral nervous system B) as an injury of the central nervous system C) as an injury of the autonomic nervous system D) as an injury of the somatic nervous system

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

Which is the most specific taxonomic level that includes apes, monkeys, orangutans, and humans?

Which statement is correct? A. Both plants and fungi undergo photosynthesis. B. Both protists and fungi are eukaryotic. C. Like some prokaryotes, fungi are autotrophic. D. Both animals and fungi lack cell walls.

In an ecosystem, bees are responsible for the pollination of flowers. Over time, the number of bees in the population have increased. Which of these best explains why the number of flowers in the population have also increased?

What is a likely consequence of continued human population growth?

Why is an organisms role important for its community?

Briefly describe what is meant by the semiconservative nature ofDNA replication?