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Questions in biology

[Done] Select the best answer for the question. 11. What's the role of a primary consumer in the food web? A. To break down organic matter in the soil B. To eat secondary consumers and produce energy C. To combine parts of the ecosystem into one nutrient D. To eat producers and store some of their energy

[Done] What percentage of sheep had a body height of 1.2 meters or more 30 years ago? How does it differ from the present data? Does this data support your argument regarding the type of selection occurring?

[Done] A molecular biologist analyzes a DNA sample and finds that adenine comprises 28% of the nucleotides. In this double-stranded DNA sample, what percentage of nucleotides would you expect to be guanine, and what principle explains this relationship? A. 22% guanine; purines equal pyrimidines B. 28% guanine; each base pairs with itself in the double helix C. 44% guanine; guanine must equal the sum of adenine and thymine D. 72% guanine; guanine comprises all non-adenine nucleotides

[Done] Which of the following statements about proteins is correct? 1. Made up of a polypeptide chain containing amino acids. 2. An asymmetric carbon atom is found between all its amino acids. 3. Two polypeptide chains coil and fold to form a secondary structural protein. 4. Organic solvents cause the protein to lose its unique three-dimensional structure. 5. Myoglobin is a quaternary structural protein.

[Done] 9) The ciliary escalator functions by A) Moving microbes towards the lower respiratory tract B) Killing microbes C) Moving microbes out of the respiratory system D) Moving microbes out from the nasal cavity 10) Which is the most abundant leukocyte? A) Basophil B) Eosinophil C) Neutrophil D) Monocyte 11) Which of the following is classified as an agranulocyte? A) Basophil B) Eosinophil C) Neutrophil D) Monocyte 12) During inflammation there is activation and increased concentration of a group of proteins in the blood called A) Kinins B) Leukotrienes C) Prostaglandins D) Acute-phase proteins 13) Phagocytes may be activated by components of bacteria such as A) Lipopolysaccharides B) Prostaglandins C) Cytokines D) Granzymes

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] "I'm doing surveys for my biology class. Would you help me pass them out tomorrow?" This sentence is an example of which of the four types of expression? A. Observations B. Thoughts C. Feelings D. Needs

[Done] Eutrophication is always the result of human activity. Please select the best answer from the choices provided. A. True B. False

[Done] What percentage of sheep had a body height of 1.2 meters or more 30 years ago? How does it differ from the present data? Does this data support your argument regarding the type of selection occurring?

[Done] Which of the following represents the study of all human genes, which are collectively called the human genome? A. Genetics B. Phenotype C. Genomics D. Genotype