Sunlight is required for all cellular organisms on earth, because all organisms are either photosynthetic or dependent on a photosynthetic organism.
a. true
b. false

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?