Scientists believe that the first organisms that appeared on Earth were prokaryotic. Which of the following best represents what the cell structure of these organisms may have looked like?

Why do flowers have pigment, not how but the reason they have pigment

8. Inflammation of the visceral and parietal pleural membranes is also known as:

What is an example of a cell theory?

How long does a water molecule circulate in the water cycle? Answer 1. until it combines with a different type of molecule 2. usually about 10,000 years 3. until something drinks it 4. Indefinitely; it is impossible to tell.

Are there cliffs or cracks on deimos?

In Drosophila, successful mating is frequently dependent upon an elaborate courtship "dance" performed by the male. Over 200 species of these fruit flies occur on the Hawaiian Islands.

Write a sentence that explains how each pair of terms are related. 1. cystic fibrosis - mutation 2. biopsy - metastasis 3. carcinogen - melanoma 4. multifactorial disorder - heart disease 5. MRI scan - CAT scan

What's the biggest change to San Joaquin Valley ecosystems caused by humans in the past 150 years?

What Is the Myocardium?

How does the dna repair enzyme photolyase prevent skin cancer?