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ion of digested FOOD occur. In hindgut water and SALTS are ABSORBED & then faecal WASTE is discarded through anus. Digestive SYSTEM of human : It is made up of alimentary canal and accessory digestive organs.

ving weeds by USING a harrow- REMOVING weeds by using a harrow (khurpi) helps in WEED CONTROL 2.TILLING or ploughing- it helps as by tilling, the weeds get pulled away3.using weedicides- using weedicides also helps in weed control.

kroo........

s the ANSWER..

ypothalamus of our BRAIN CONTROLS the SECRETION of ENDOCRINE GLANDS.:-)

it is what are the TYPES of FISH PRODUCTION

✨⏩The valves PRESENT between DECOMPOSITION of atria and ventricles helps to prevent the backward FLOW of BLOOD in heart.⏪☺HOPE IT HELPS☺✌THANKS✌

on is the basic unit of structure in the KIDNEY. A nephron is used separate to water, ions and small MOLECULES from the BLOOD, filter out wastes and toxins, and return NEEDED molecules to the blood. The nephron functions through ultrafiltration.

selection can not create variations it can only eliminate the existing variations that are not as well adapted to the CHANGING environment as others. Natural selection acts like a racket. Natural selection preserves variations that are BEST suited to environment.An example of natural selection selecting variations best suited to the environment, is the peppered moths of England. There were TWO variations of the moth, one dark or melanic and the other white. Before the industrial revolution the white variation was dominate. During the industrial revolution the pollution favored the dark or melanic variation. The species evolved or changed to being primarily dark. When the pollution problems of the industrial revolution was solved the environment favored the white variation and the species evolved and changed back to the white variation.Variations are necessary for changes, or evolution to occur. The amount of change is limited to the variations that exist. When Darwin proposed his theory of evolution he thought wrongly that variation in germ cells was unlimited. Gregor Medal discovered that genetic variation is generally conservative, that is that new variations are not CREATED in normal genetics.Variations are known to create changes within a species. These changes are also known as adaptive evolution or MICRO evolution.The variations required to create changes from one species to another species have never been empirically observed. These changes are known more correctly as Darwinian evolution or macro evolution.Variations is the driving force in evolution or change. Natural selection can only act on existing variations. So for evolution of any kind to occur there must be variations.

into a POT. then dry it SORRY just kiddin g you have to first take v=bag or a CONTAINER then take SEEDS and make plant then OBERVE pollination

mers use LOW seed rate owing to which plant population remains low in the field, a major cause of low yield . ... Plant DENSITY: One of the major causesof low crop yield is low plant population because number of PRODUCTIVE plants PER unit area determines crop yields.

because the ducts are wavy rather than absolutely straight. COMPARE these SECTIONS of apocrine glands with the merocrine glands SEEN above. SEBACEOUS glands are holocrine glands. Their secretion, sebum, is an oily MATERIAL

e is your answer....Mendel's Law of DOMINANCE can also be simply stated as: “In a cross of parents that are pure for contrasting traits, only ONE FORM of the TRAIT will APPEAR in the next generation. Offspring that are hybrid for a trait will have only the dominant trait in the phenotype.”I hope it helps yu...,

atocrit is typically measured from a blood sample by an automated machine that makes SEVERAL other measurements of the blood at the same time. Most of these machines in fact do not directly measure the hematocrit, but INSTEAD calculate it based on the determination of the amount of HEMOGLOBIN and the average VOLUME of the red blood CELLS. The hematocrit can also be determined by a manual method using a centrifuge. When a tube of blood is centrifuged, the red cells will be packed into the bottom of the tube. The proportion of red cells to the total blood volume can then be visually measured.

retory system is the system of an organism's BODY that performs the FUNCTION of excretion, the bodily process of discharging wastes. The EXCRETORY systemis RESPONSIBLE for the elimination of wastes produced by homeostasis.that's it

m of the genus Sabal of American DWARF fan PALMS; usually CALLED PALMETTO.

is a hydroxy derivative with( -OH ) hydroxy group as it's FUNCTIONAL group. ETHANOIC acid is a carboxylic acid with -COOH as it's functional group. so you can SAY the correct answer is option D

LinnaeusCarl Linnaeus, also known as Carl von Linné or CAROLUS Linnaeus, is often called the Father of TAXONOMY. His system for naming, RANKING, and classifying organisms is still in wide use TODAY (with many changes).

!!!!!!This is your ANSWER ⤵⤵⤵⤵⤵⤵↪ POLYSACCHARIDES found in seaweed. ↪Phycocolloids are hygroscopic and ABSORB water to FORM gels. ↪ Examples of phycocolloids are IRISH moss, algin, and agar.I HOPE THIS MAY HELP YOU ☺

of microorganisms in mineral processing technology is called biomining. ... These characteristics are mainly generated by the MICROBIAL oxidation of sulphide minerals present UPSTREAM. It is currently known that bioleaching PROCESSES can be catalyzed by many species of BACTERIA, archaea and fungi.May 1, 2017Biomining - Wikiversity

ved that it carry hunger generation SIGNALS to the brain DIENCEPHALON 10 th carnial NERVE 5th cranial nerve spinal cord

o) is the study of developmental programs and PATTERNS from an evolutionary perspective.[1] It seeks to UNDERSTAND the various influences shaping the form and nature of life on the planet. Evo-devo arose as a separate branch of science rather recently. An early sign of this occurred in 1999.[2]Most of the synthesis in evo-devo has been in the field of animal evolution, one REASON being the presence of elegant model systems like Drosophila melanogaster, C. elegans, zebrafish and Xenopus laevis. However, since 1980, a wealth of information on plant morphology, coupled with modern molecular techniques has helped shed light on the conserved and UNIQUE developmental patterns in the plant kingdom also.[3]

term used to depict and examine frameworks of general medicinal services that is, restorative and doctor facility look after all at an ostensible cost by method for government regulation of social insurance and endowments got from tariff.Preventive and social MEDICINE is concerned with the measures taken to PREVENT diseases and promote health. Preventive and social medicine is also known as community medicine or public health. Preventive and social medicine offers medical services ranging from curative to rehabilitative.Preventive and social medicine has expanded during the last few decades. Presently, it deals with the health problems of not only a single PERSON but the ENTIRE community at large. Public Health involves statistics, psychology, sociology, law, engineering and economics as well as CLINICAL sciences and biological sciences.

rium is an artificial ecosystem and the organisms present in it are selective and maintained in a restricted environment. In the Aquarium the uneaten food as well as the waste generated by the fishes mixes with the water and is left UNTREATED due to the lack of decomposers. The waste materials THUS accumulate in the water making it toxic. Hence an aquarium has to be cleaned after regular intervals. On the other hand, a pond or a LAKE ecosystem is a natural ecosystem and the types of organism present in it is balanced. The waste produced in this ecosystem serves as the food MATERIAL for the decomposers and is thus eliminated by them from the water. This ensures a balance in the water body and keeps the water clean and thus does not require physical CLEANING.

g Over on the Chromosomes: Mechanisms, Kinds, Factors andSignificance! Crossing over is the process of exchange of GENETIC MATERIAL or segments between non-sister CHROMATIDS of two homologous chromosomes. Crossing over occurs due to the interchange of sections of homologous chromosomes.

the MAMMARY GLANDS....

dy.☆ Unicellular Organism :A unicellular organism is an organism that consists of a SINGLE CELL. This means all life processes, such as reproduction, feeding, digestion, and excretion, occur in one cell. Amoebas, BACTERIA, and plankton are just some TYPES of unicellular organisms. They are typically microscopic and cannot be seen with the naked eye.Hope it's help for you ^_^.

f HELPS the plant of BRYOPHYLLUM for reproduction by VEGETATIVE propogation, as the leaf has many sprouted plants already growing on it if you observe.hope it helps PLZ MARK as brainliest

't EVOLVE from monkeys. monkeys and HUMANS have evolved from the same species KNOWN as homo sapiens. so there are STILL monkeys .plzz mark as brainliest

rax2. CHICKENPOX

ction of any three structural and functional unit of NERVOUS system are 1) Sensory neuron - It CARRY message from body to BRAIN.2) Motor neuron - It carry message from brain to body.3) MIXED neuron - It carry message from body to brain and brain to body.

tes2.insulin3.pancreas4.It CONTROLS BLOOD SUGAR level.hope it HELPS you:)

ganelles are ORGAN like each PERFORMING specific function/s but formed of molecules and membranes only (sub-cellular). Double MEMBRANE bound Organelles: Mitochondria,Chloroplasts, Endoplasmic Reticulum,Golgi Body, and Nucleus it ABSENT in lysosome...hope it may help u

, JAN Baptist van Helmont was arrested by agents of the Spanish Inquisition for the crime of studying plants and other phenomena. While under house arrest, he started to consider how plants grew. The prevailing THEORY at the time was that plants grew by eating soil, and van Helmont devised a CLEVER investigation to test this idea. He weighed a willow tree and weighed dry soil. He planted the tree, watered it and then left it for 5 years. He then re-weighed the tree, which had increased in mass by over 12 stone. He DRIED the soil and weighed it, showing that the soil was almost the same mass. He concluded that the tree grew by drinking water.....hope it helps u mate....pls mark me brainliest

— Haldane theory of chemical origin of life. The Russian scientist Alexander Ivanovich Oparin (1924) and British scientist J.B.S. Haldane (1929) proposed the ‘Theory of chemical evolution of life’. According to this theory, life originated from non-living matter, some three billion years ago, in a primitive atmosphere, through a PROCESS of chemical evolution. The entire process of chemical evolution can be divided into the following steps:i. Origin of earth and its primitive atmosphere:a. The origin of life on earth is closely related to the origin of earth itself.b. Evidences suggest that earth originated about 4.6 billion years ago.c. When it was broken from the sun, it was a glowing fire and a rotating cloud of hot gases, vapours of various elements and pieces of rocks and metals called Nebulous.d. This mass of gas exploded with a Big Bang into several small pieces. The earth, as a piece was broken from the sun.ii. Formation of ammonia, water and methane:a. The prebiotic environment had very less resemblance with the present day environment.b. The earth was very hot initially and so the atoms could not COMBINE with each other very easily.c. The primitive earth contained a large amount of hydrogen, nitrogen, carbon and oxygen.d. Of these, hydrogen was very active.iii. Synthesis of simple organic compounds:a. The next step in molecular evolution was the formation of micromolecules.b. As the earth surface considerably cooled, the highly reactive free radicals –CH and – CH2 condensed to form a variety of both saturated and unsaturated hydrocarbons.c. The simple inorganic molecules of the oceanic water interacted with one another to form simple organic molecules such as sugar, fatty acids, glycerol, amino acids, purines and pyrimidines.d. The energy for these reactions was provided by the electrical discharges (lightning), ultraviolet rays (solar radiations), VOLCANIC activities and decay of radioactive elements.iv. Formation of complex organic compounds:I. The hot dilute soup was sterile and oxygen free.II. Simple organic substances came together in increasing numbers.III. They colloided, reacted and aggregated forming new complex molecules such as . polysaccharides, fats, proteins, nucleosides and nucleotides.IV. The protein molecules made their existence by polymerization of amino acids.v. Formation of nucleic acid:I. The next step in chemical evolution was formation of nucleic acid.II. It was formed by the aggregation of phosphoric acid, sugar, purines and pyrimidines.III. They were linked in various combinations to form different types of nucleotides.IV. Thousands of nucleotides joined together to form nucleic acid.vi. Formation of Protobiont or precells:I. The nucleic acid along with inorganic and organic molecules formed the first form of life and were called protobionts or precells.II. The proteins formed colloidal hydrophilic complexes SURROUNDED by water molecules.III. Oparin and Sydney Fox demonstrated the formation of this aqueous suspensions of polymers.IV. Oparin called these aggregates as Coacervates, while Sydney Fox called them Protenoids or Microspheres.vii. Formation of First Cell:I. The nucleic acids in pre-cells had the capacity to multiply but gradually it started directing a series of chemical reactions like protein synthesis.II. That was the significant step in the transformation of pre-cell into a cell.III. This chemical evolution gave rise to the biological evolution.viii. Biological evolution:I. The first cells or primitive cells were marine and heterotrophic in nature.II. They obtained their food from the surrounding areas.III. Growth and multiplication of these cells caused depletion in the food and increase in CO2 DUE to fermentation.IV. These were the favourable circumstances for mutation, which resulted in the development of chromophores.hope it helps u mate....pls mark me brainliest

on't KNOW search these things in Google or any other website OK

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a disease is mercury poisoning and SPARROW CAMPAIGN was started because people thought SPARROWS were eating there grain but they were killing the pests