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10th grade biology book answers

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Question:I can't find these answers in the book,it says they're all true. Some help please? __________________________________________________ Which statement about viruses is FALSE? A. Viruses are subcellular parasites B. Viruses show characteristics of both non-living and living. While they don't carry on respiration, growth or movement, they can reproduce, but only in a living cell. C. Each virus must have a very specific host cell. D. A virus that can infect bacteria cells is called a provirus.

Answers:D) A provirus is a piece of viral DNA in a bacteria's genome I think...viruses were last year... I sooo need to study for the AP test

Question:1. How are the forelimbs similar in a bat and a human?? 2.How did Darwin interpret the fossil record? 3. What conditions force organisms to compete in a struggle for existence? 4. How do successful adaptations improve an organism's fitness? 5. What does descent with modification imply about the relationships among the different species on Earth today? 6. The practice of breeding dogs to produce offspring with specific traits is an example of : a. natural variation b. natural selection c. common descent d. artificial selection. P.S. Please help me answer these. Thank you :]]

Answers:1 , same bones. 3. Limited resources, they live in same niche 5. We all evolved from a common ancestor postin over 3 questions in 1 questions is bad etiquette =(

Question:My book says," Give a definition for protoplasm in line with modern biological concepts." OH MY GOSH! I just dont get it...haha...can someone help me with this...I just can't find the answer in my book..uhh... and then this other question says," Explain the relationship of variations to adaptions." Does anyone know this..any of you smart ppl? Thanx so much... Haley

Answers:The protoplasm is the living organic components within each single celled organism. Each shares a few in common, i.e. the nucleus, Mitochondria, etc. Depending on the organism, and the environment it lives in, the different structures within the cell, and it's external characteristics will vary(variations) in "relation" to it's particular environment. Compare the aomeba to the paramecium, or flagella, you will see the variations.

Question:the relationship between chromosomes, chromatids, centromeres, DNA, and chromatin. okay the book i am suppose to get this answer too is the prentice hall biology book. Is it just me or is this really hard question?

Answers:no its pretty easy. when a cell is getting ready to split its dna is spun into strands called chromatin. the chromatin coils into chromatids and 2of them are thn attached at the middle by a centromere. the double chromatid and centromere structure is called a chromosome.