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Questions in biology

[Free] Environmental factors can influence natural selection because they can increase or decrease A. the number of chromosomes in an individual. B. the number of chromosomes in a population. C. the amount of genetic variation in an individual. D. the amount of genetic variation in a population.

[Free] In a tabular form, list 10 feed ingredients (e.g., maize, soyabean, etc.) you know, with their nutrient contents (crude protein, crude fat, crude fibre, ash, nitrogen free extract). Submit same on 4/07/2025. Thanks.

[Free] What tube connects the kidney to the bladder and moves urine through peristalsis? A) The ureters B) The urethra C) The nephrons D) The renal arteries

[Free] Environmental factors determine whether or not all genetic traits lead to health issues. Please select the best answer from the choices provided. A. True B. False

[Free] 1. The lungs are two balloon-like body parts that lie in the ______ cavity. 2. ______ and ______ help in movement of the body parts. 3. There are ______ bones in our body. 4. The stomach helps us to ______ the food we eat.

[Free] Which serves as evidence for a scientific claim? A. surveys of public opinion B. company advertisements C. controlled experiments D. personal websites

[Free] Primotologists are always trained as biologists. True False

[Free] Why are circling arrows a good representation of the endocrine system? A) The endocrine system maintains homeostasis and often does it through negative feedback regulation. B) The endocrine system is responsible for recycling worn-out macromolecules and repurposing them. C) The endocrine system reuses hormones, so it is a very efficient system.

[Free] Which of the following statements best describes the role of hormones in the body? A. Hormones send chemical signals throughout the body to regulate other body processes. B. Hormones are chemical signals that are sent throughout the body to regulate other body processes. C. Hormones send electrical signals throughout the body to regulate other body processes. D. Hormones are electrical signals that are sent throughout the body to regulate other body processes.

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