Bio 121 exam 3 - Study guides, Class notes & Summaries

BIO 121 Exam 3 Questions And Answers Whole-gene The molecular level describes genetic variation as nucleotide variability. Although populations do vary in their characteristics, it is at the gene level that genetic variation can be quantified. Although species do vary in their characteristics, it is at the gene level that genetic variation can be quantified. Individuals may vary in a population, but it is at the gene level that genetic variation can be quantified. - ANS At wha...

Respiration Breakdown of fuel (food) molecules to release energy; ALL living organisms do this Photosynthesis Using sunlight energy and atmospheric CO2 to make food molecules; Autotrophs Photosynthesis equation Energy+ 6CO2+ 6H2O= C6H12O6+ 6O2; reverse of respiration; synthesizes carbohydrates Where does photosynthesis take place? Chloroplasts- the leaf mesophyll cells Things that use photosynthesis photosynthetic autotrophs; plants & green algae, non-plant eukaryotes (kelps, diatoms), bacte...

Binary fission a method of asexual reproduction; "division in half"; involves mitosis in eukaryotes Mitosis a process of nuclear division in eukaryotes What are the 5 stages of Mitosis? 1. Prophase 2. Prometaphase 3. metaphase 4. anaphase 5. telophase Meiosis A modified type of cell division in sexually reproducing organisms consisting of 2 rounds of cell division, but one round of DNA replication. Half number of chromosome sets as original cell Sexual Reproduction A type of reproduction i...

The early earth's atmosphere had almost no free oxygen (O2). Now it is almost 20% O2. Where did all this O2 come from? Photosynthesis Endocytosis and exocytosis are important for what? Endocytosis- vesicle pinches inward and moves a bubble of solutes into cells, membrane dissolves in cell and frees them (NO atp) signals on the outside membrane attract what we need and enfold when they come near exocytosis - send them out (No atp) They regulate what is in the cell, cell homeostasis Glucose, fa...

BIO 121 Module 1 Exam Questions With Answers | Score 100/100 2023- 2024. Nutritional value and taste are often the 2 most important reasons specific foods are consumed in North America. False, its taste and texture which are 2 most important reasons. False: Taste and texture are often the 2 most important reasons specific foods are consumed in North America. Question 2 4 / 4 pts Multiple Choice: Nutrition is the science that links foods to _____ and ______. health; nutritional value w...

Get ready for your BIO 121 exam with actual questions from Fall 2024! This resource includes 60 well-designed questions and answers from Campbell Biology, 12th Edition, making it ideal for reviewing Chapters 2, 3, 4, and 5. | Bindiya Kaushal

Food Security Correct Answer adequate, safe, nutritious Greatest Challenge coming up 925 million Correct Answer people in the world suffer from undernutrition 60%; 25% Correct Answer Overweight; obese Malnutrution Correct Answer shortage of nutrient the body needs, occurs when a person fails to obtain a complete complement of vitamins and minerals 38% of earths surface land Correct Answer agriculture covers 26% is rangeland Correct Answer 12% is cropland Human and muscle power...