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Questions in biology

[Terjawab] What technological advancement was necessary before scientists could begin to observe cells? A. invention of the microscope B. invention of the balance C. invention of the telescope D. invention of the thermometer

[Terjawab] Why is surface area in the small intestine so important? A) Absorption of nutrients B) Mechanical digestion of food C) Chemical digestion of food

[Terjawab] A. Fill in the blanks by choosing suitable words. Options: microorganisms, non-living, photosynthesis, nonrenewable 1. Environment includes living and .......... components. 2. Plants, animals and .......... are living components of environment. 3. Sunlight, air, water and .......... are nonliving components of environment.

[Terjawab] 3.1. State one characteristic of the deer mouse which allows it to avoid predators. (1) 3.2. Using natural selection, explain how the inheritance of light coloured fur allele allowed the deer mice to survive in the light sand dunes. (6) 3.3. Tabulate two differences between Lamarck's and Darwin's theories. (5)

[Terjawab] Explain the relationship between electron transport and oxidative phosphorylation. How do uncoupling proteins "uncouple" this relationship in brown adipose tissue? Match the terms in the left column to the appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all. Terms: the electron transport chain reduction potential inner membrane proton gradient electron gradient oxidative phosphorylation protons electrons complex IV Sentences: The electron transport chain is possible via a(n) __________ that is established in __________. Uncoupling proteins disrupt this relationship by allowing __________ to freely pass through the __________, thus reducing the __________ and the production of ATP by __________.

[Terjawab] Does fertilization happen in plants? A) Yes, for sexual reproduction. B) Always, for both sexual and asexual modes of reproduction. C) No, fertilization only happens in animals.

[Terjawab] Procedure: 1. What I Know: Write two sentences about what you already know or think you know about plant cells.

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

[Terjawab] 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.

[Terjawab] 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)