Which characteristics work well in a dichotomous key?

a) smooth or rough

b) green or round

c) triangle or purple

d) tall or bumpy

What happens during crossing over and what is the significant?

21. What enables a gene to code for different versions of a trait in different organisms? A. differences in the sequence of alleles on a chromosome B. differences in the sequence of genes on a chromosome C.

When did grass evolve?

A desert region would be most likely to experience what type of weathering? A. Sedimentary B. Exfoliation C. Freeze-thaw D. Biological

What best describes a difference between transcription and DNA replication

Which of the following is not part of the carbon cycle? -Photosynthesis in plants -Respiration in plants -Evaporation of water from the oceans -Decay of plants

What would happen if a keystone species is removed from an ecosystem

Which material will displace a volume of water? all of them cork and wax iron, lead, and aluminum none of them Which material will displace a volume of water less than its own volume?

Why is mitosis responible for for growth, repair, and maintence

Explain one way in which a hormone can prevent contraception