Which of the following adaptations does not protect tundra organisms from heat loss?

a.

thick fur

b.

retention of dead leaves

c.

dense hair

d.

production of chemicals to ward off insects

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

During binary fission, what events must occur before the cell splits into two new cells?