Try Out Ujian Nasional Biologi 2011

Thrombin and fibrin are involved in the process of blood clotting. Thrombin is an enzyme that converts fibrinogen, a soluble protein in plasma, into fibrin, which forms a mesh-like structure to create a blood clot. This clotting process is essential for stopping bleeding and promoting wound healing. Therefore, the correct answer is thrombin and fibrin.

When forest areas are converted into settlements, several negative consequences can occur. These include a decrease in the availability of spring water during the dry season in the settlement area, the occurrence of floodwaters in lower areas during the rainy season, changes in microclimate in the settlement area, and the water source in the settlement area becoming turbid during the rainy season. However, the one thing that would not happen is the balance of water sources between the dry season and the rainy season.

Based on the data, it can be concluded that the growth of green bean sprouts is faster in a dark place.

Keseimbangan lingkungan tidak dapat menjadi penyebab hilangnya keanekaragaman hayati. Sebaliknya, keseimbangan lingkungan berperan penting dalam menjaga keanekaragaman hayati. Keseimbangan lingkungan mencakup interaksi antara berbagai faktor biotik dan abiotik yang memungkinkan kehidupan beragam spesies. Faktor-faktor lain seperti perubahan iklim global, pencemaran tanah dan air, introduksi spesies, dan fragmentasi serta hilangnya habitat dapat menyebabkan gangguan pada keseimbangan lingkungan dan menyebabkan hilangnya keanekaragaman hayati.

The correct answer is Zigot, morula, larva planula, dan koloni baru. This is the correct answer because it follows the correct sequence of the life cycle of Coelenterata (Obelia sp). The life cycle starts with the formation of a zygote, which then develops into a morula. The morula then transforms into a larva planula, which eventually forms a new colony. Therefore, the correct sequence is zigot, morula, larva planula, and koloni baru.

Asfiksi is a respiratory disorder caused by the disruption of oxygen (O2) transportation to the body tissues. This can occur due to various reasons such as blockage or constriction of the trachea, inflammation of the upper nasal blood vessels, swelling of the lymph glands in the nasal cavity, or any other condition that hinders the proper delivery of oxygen to the tissues.

The correct answer is Daging buah kelapa kopyor - daging buah kelapa gading. This is because the variation in the flesh of the coconut fruit, with kopyor having a different texture and taste compared to gading, demonstrates the genetic diversity at the level of genes.

The correct answer is "Mengangkut air dan garam mineral". This is because the function of the labeled X network in the cross-sectional image of the stem is to transport water and mineral salts.

The factors that are closely related to the increase in surface temperature of the earth are the decrease in the volume of polar ice (2), the decrease in the volume of ozone in the atmosphere (3), and the greenhouse effect (6). The decrease in polar ice leads to less reflection of sunlight, causing more heat to be absorbed by the earth's surface. The decrease in ozone allows more ultraviolet radiation to reach the earth's surface, which contributes to warming. The greenhouse effect is caused by the accumulation of greenhouse gases, such as carbon dioxide, in the atmosphere, trapping heat and causing a rise in temperature.

The correct answer is Supinasi - pronasi. Supinasi is the movement of the forearm where the palm is turned upward or facing forward, while pronasi is the movement of the forearm where the palm is turned downward or facing backward. These movements are primarily controlled by the muscles in the forearm, specifically the supinator and pronator teres muscles.

The correct answer is 1. The table provided likely contains information about the relationship between organs, enzymes, and their functions in digestion. The number 1 in the answer indicates that the correct information can be found in the first row or column of the table.

Based on the given life cycle diagram of fern growth, the protalium stage is represented by the image number 4.

The correct answer is 2,5. This is because characteristics 2 and 5 are specific to birds (class Aves). The presence of wings as upper limbs (characteristic 2) and the presence of feathers covering the body (characteristic 5) are unique to birds and not found in other vertebrates.

The correct answer is Asimilasi, respirasi, dan dekomposisi. Based on the given carbon cycle diagram, process number 1 represents assimilation, process number 2 represents respiration, and process number 6 represents decomposition. Assimilation is the process by which plants and other organisms incorporate carbon into their tissues. Respiration is the process by which organisms release carbon dioxide back into the atmosphere. Decomposition is the process by which organic matter is broken down by bacteria and fungi, releasing carbon back into the soil or atmosphere.

The correct answer is "Kornea, aquos humor, pupil, lensa, vitreous humor dan retina". This is the correct order of the path of light that is captured by our eyes when we see an object. The light first enters through the cornea, then passes through the aqueous humor, which is the clear fluid in the front of the eye. Next, it reaches the pupil, which is the opening in the center of the iris. The lens then focuses the light onto the retina, which is the light-sensitive tissue at the back of the eye. Finally, the light reaches the vitreous humor, which is the gel-like substance that fills the back of the eye, before being processed by the retina.

The correct answer is Retikulum endoplasma. The endoplasmic reticulum is a network of membranous tubules and sacs found in the cytoplasm of eukaryotic cells. It is involved in various cellular processes, including the synthesis and transport of proteins. The rough endoplasmic reticulum, which is studded with ribosomes, is responsible for protein synthesis, while the smooth endoplasmic reticulum is involved in lipid metabolism and detoxification of drugs. Therefore, the endoplasmic reticulum is a fine network of membranous channels that is closely associated with the protein synthesis and transport system in the cell.

Guano is a source of nutrients for plankton, which is the primary food source for fish and birds. If there is excessive extraction of guano, it can lead to a decrease in plankton population. This, in turn, will result in a decrease in the population of fish and birds, as they rely on plankton for their survival. Therefore, the correct answer is "Berkurangnya plankton, berkurangnya populasi ikan dan burung."

not-available-via-ai

Nitrosomonas dan Nitrobacter adalah bakteri yang terlibat dalam siklus nitrogen. Nitrosomonas bertanggung jawab untuk mengubah amonia menjadi nitrit dalam reaksi nomor 1, sedangkan Nitrobacter mengubah nitrit menjadi nitrat dalam reaksi nomor 2. Kedua bakteri ini bekerja secara sinergis dalam proses nitrifikasi, yang merupakan bagian penting dari siklus nitrogen di alam.

Estrogen stimulates the pituitary gland to secrete LH (luteinizing hormone), which is responsible for causing the follicle to rupture. This leads to ovulation, the release of the mature egg from the ovary.

The correct answer is 1, 2, 4. This is because ciliates, which are a type of protozoa, have certain characteristics that differentiate them from other protozoa. They have a body covered in cilia or hair-like projections (characteristic 1), they use these cilia for movement (characteristic 2), and they reproduce through binary fission and conjugation (characteristic 4). Therefore, options 1, 2, and 4 are the correct choices.

The correct answer is Glomerulus-kapsula bowman-tubulus proksimal-henle-tubulus kolektifus. This is the correct order of the structures in a nephron. The glomerulus is the first structure where blood is filtered, followed by the Bowman's capsule which collects the filtrate. The proximal tubule then reabsorbs important substances from the filtrate, followed by the loop of Henle which further concentrates the filtrate. Finally, the distal tubule and collecting ducts regulate the final composition of the urine before it is excreted.

The correct answer is 2, 4, 5, 3. This is because glikoprotein is indicated by number 2, glikolipid by number 4, protein integral by number 5, and kolesterol by number 3.