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Questions in biology

[Homework Help] What are two differences between a rhizoid and a rhizome?

[Homework Help] Which of the following is not a spore-bearing vascular plant? A. Ferns B. Cycads C. Club mosses D. Horsetails

[Homework Help] The organ system that consists of ductless glands that secrete hormones and the molecular receptors on target cells that respond to the hormones is known as the: (A) digestive system. (B) respiratory system. (C) circulatory system. (D) endocrine system. (E) nervous system.

[Homework Help] Forces come in pairs. What are these pairs called?

[Homework Help] Which of the following statements does NOT contribute to the evidence in support of evolution? A. Sequences of fossils have been found that show a gradual series of changes in form among organisms. B. Species thought to be related through evolution from a common ancestor show many anatomical similarities. C. The stages of embryological development in animals are quite similar among highly diverse types of organisms. D. Similarities in chromosome structure, DNA sequence, and amino acid sequence suggest relationships among organisms descending through evolution from a common ancestor. E. The most well-adapted individuals do not always produce the most fit offspring.

[Homework Help] What is the first land mammal shown to reach the African wetlands?

[Homework Help] Why does the plasma cell have a well-developed endoplasmic reticulum with lots of ribosomes?

[Homework Help] Adaptations for water in fish include: a. several fins for swimming. b. a system of muscles for movement. c. gills that allow them to "breathe" oxygen in water. d. all of the above.

[Homework Help] Help please! Which area pictured below shows water entering the atmosphere from respiration and transpiration

[Homework Help] Describe an early monotreme mammal.