A puppy has a short tail. His father has a short tail, but the puppy’s mother has a long tail. The long tail allele is recessive. The best explanation for the puppy having and showing a short tail is * 1. a gene mutation occurred that resulted in a short tail
2. the puppy only received DNA from the father
3. the puppy received genetic information from each parent, but the short tale allele was dominant
4. the puppy only received DNA from the mother

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

When are the centromeres broken in meiosis?

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact use of manure and other organic fertilizers reduction in population of birds use of pesticides in farms increase in bird population in nearby wetlands impact of human activities human activity impact use of manure and other organic fertilizers reduction in animal population use of pesticides in farms increase in population of native insects and bugs impact of human activities human activity impact use of plastic decrease in marine animal population removal of beach grass increase in pollution of ocean impact of human activities human activity impact use of plastic increase in fish population removal of beach grass decrease in sand erosion