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Questions in biology

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

[Homework Help] Man has evolved over centuries. Therefore, many parts of our body which were needed by our ancestors then are no longer needed by us now. These organs, which once performed a function but now no longer have any use are called vestigial organs. A. You might have seen a dog moving its ears. Why do you think it does so? B. It is believed that ancient humans used to have a tail. Find more about it and write in the space given below. C. Can you think of any more vestigial organs in human beings? Write about any one vestigial organ.

[Homework Help] Which of the following pituitary hormones regulates the activity of another endocrine gland? A) LH (lutenizing hormone) B) Prolactin C) GH (growth hormone) D) ADH (antidiuretic hormone)

[Homework Help] 2. What is the function of the stomach? 3. What does biodiversity mean? 4. Why are leaves called the food factory of the plants?

[Homework Help] Discuss the different ways animals can be grouped based on their habitats. Give examples.

[Homework Help] Photosynthesis occurs in both prokaryotes and eukaryotes. How do the locations where photosynthesis occurs differ in prokaryotes and eukaryotes? A. Photosynthesis takes place in specialized organelles like chloroplasts in prokaryotes, and on the folds of the cell membrane in eukaryotes. B. Photosynthesis takes place outside of the cell wall in prokaryotes, and in specialized structures called pili in eukaryotes. C. Photosynthesis takes place on the folds of the cell membrane in prokaryotes, and in specialized organelles like chloroplasts in eukaryotes. D. Photosynthesis takes place in specialized structures called pili in prokaryotes, and outside of the cell wall in eukaryotes.

[Homework Help] What role do tRNA molecules play in protein synthesis? A. They carry amino acids to sites of protein synthesis. B. They carry ribosomes to the mRNA molecules. C. They carry mRNA molecules from the nucleus to the cytoplasm. D. They carry release factors to terminate translation.

[Homework Help] The ______ carries neural impulses to the area of the brain that processes sound.

[Homework Help] In meiosis, a diploid cell divides twice, yielding four haploid daughter cells. What separates in meiosis I? A. Old and new chromosomes B. Parent and daughter DNA C. Sister chromatids D. Homologous chromosomes

[Homework Help] Read the following statements and find out the incorrect statement. (1) Both stem tendrils and thorns are the modification of axillary buds. (2) Thorns are woody, curved and pointed structures found in Citrus and Bougainvillea for protecting them from browsing animals. (3) Opuntia and Euphorbia are found in arid regions. They contain chlorophyll in their stem and carry out photosynthesis. (4) Stem tendrils are found in gourds and grapevines that are slender and spirally coiled and help plants to climb.