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Questions in biology

[Terjawab] Which layer of soil is most likely of greatest importance to plant growth? a. O (organic matter) b. A (topsoil) c. B (subsoil) d. C (parent rock)

[Terjawab] A. Tick (✔) the correct option: 1. _______ are reptiles that have no limbs. (a) snakes (b) lions (c) birds 2. Insects breathe through: (a) spiracles (b) gills (c) moist skin 3. Which organ helps a fish breathe? (a) lungs (b) gills (c) nose 4. Dolphin and whale breathe through the: (a) moist skin (b) spiracles (c) blowhole 5. A series of tiny holes along the sides of the bodies of insects is called: (a) spiracles (b) gills (c) shells Answer in one word or phrase:

[Terjawab] _________ is the sum of all chemical reactions that occur in living cells. Multiple Choice: A) Homeostasis B) Anatomy C) Chyme D) Metabolism

[Terjawab] Across 1. Scientists make ____ to help them formulate hypothesis or collected data. 4. The first step of the scientific method is to identify the ____. 5. It is a step-by-step description of how the experiment is carried out. 8. A tentative answer to the problem. 9. The variable that is not tested but used as a standard for comparison. 10. The information collected during the experiment. 11. After the experiment, scientists organize and ____ the data.

[Terjawab] Put in correct order the sequence in which excitation would move through the conducting system of the heart: 1. Purkinje fibers 2. AV bundle 3. AV node 4. SA node 5. bundle branches A. $1,4,3,2,5$. B. $4,3,2,5,1$. C. $4,2,3,5,1$. D. $3,5,4,2,1$. E. $3,2,4,5,1$.

[Terjawab] Which is not a function of synovial fluid? A. Lubricates articulating surfaces B. Serves as shock absorber C. Nourishes osteocytes D. Distributes stress forces across articular surfaces E. Removes wastes

[Terjawab] Explain why we should learn environmental science?

[Terjawab] Why would a scientist add a fluorescent jellyfish gene to a plasmid? A. To make the gene easier to photograph B. To determine if plasmid transformation has been successful C. To provide a way to insert the plasmid into the bacterium D. To ensure that the bacterial gene is incorporated into a plasmid

[Terjawab] Which of the following statements is true concerning fertilization in ALL animals? A) A single sperm must fertilize the egg. B) Fertilization must occur internally. C) Only gametes from the same species can go through fertilization successfully.

[Terjawab] Which organs are responsible for producing fluid to give sperm nourishment and motility? A. vas deferens B. testes C. seminal vesicles D. prostate glands