About how long ago did the first single-celled life form appear on Earth? A. 130 million years ago
B. 1.5 billion years ago
C. 2.5 billion years ago
D. 4.1 billion years ago

How had the study of mitosis affected scientists knowledge of cancer

Use this new information to determine the parents’ genotypes (indicated by red arrows). then calculate the probabilities that the second male offspring will have each condition. drag one pink label to each pink target and one blue label to each blue target. then use the white labels to answer questions 1 and 2. labels can be used once, more than once, or not at all.

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?