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Answer:

Autotrophic nutrition (any two)

HETEROTROPHIC nutrition (any two)ORGANISM prepares its own food.

Organism depends on other organisms for food.Food is prepared from CARBON dioxide and water in PRESENCE of sunlight.Food cannot be prepared from carbon dioxide or water.

Maize

Maize is not a RABI crop. It is a KHARIF crop. Rabi crops includes-wheat, barley, MUSTARD, PEAS, gram etc.

Explanation:

GREEN PLANTS PREPARE THEIR FOOD THROUGH THE PROCESS OF PHOTOSYNTHESIS

SO THEY ARE CALLED AUTOTROPHS

AND THIS TYPE OF NUTRITION IS CALLED AUTOTROPHIC NUTRITION

ANSWER:

ANSWER:

CHLORELLA is a genus of single-celled green algae belonging to the DIVISION Chlorophyta. It is spherical in SHAPE, about 2 to 10 μm in diameter, and is WITHOUT flagella. It contains the green photosynthetic pigments chlorophyll-a and -b in its chloroplast.

Explanation:

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ANSWER:

SORRY I don't KNOW the answer

ANSWER:

PERMANENT tissues

Parenchyma

Collenchyma

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Answer:

Explanation:

A natural hazard is a threat of a naturally occurring event that will have a negative EFFECT on humans.   This negative effect is what we CALL a natural disaster.  In other words, when the hazardous threat actually happens and HARMS humans, we call the event a natural disaster.

Natural Hazards (and the resulting disasters) are the result of naturally occurring processes that have operated throughout Earth's history.  

Most hazardous processes are also Geologic Processes.

Geologic processes affect every human on the Earth all of the time but are most noticeable when they cause loss of LIFE or property. If the process that poses the hazard occurs and destroys human life or property, then a natural disaster has occurred.  Among the natural hazards and possible disasters to be considered are:          

Earthquakes

Volcanic Eruptions

Tsunami

Landslides

Subsidence

 Floods

Droughts

Hurricanes

Tornadoes

Asteroid Impacts

All of these processes have been operating throughout Earth history, but the processes have become hazardous only because they negatively affect US as human beings.  Important Point - There would be no natural disasters if it were not for humans.  Without humans, these are only natural events.

ANSWER:

wheat

Explanation:

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ANSWER:

Because the IMMUNITY of SECOND GROUP is STRONGER........

your ANSWER is diffusion

Explanation:

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Answer:

EXPLANATION:

In gietonogamy, the pollen grain from the ANTHER of a flower falls on the STIGMA of ANOTHER flower of the same plant. WHEREAS, in xenogamy, the pollen grains from anther of a flower falls on the stigma of the flower of different plant.

Answer:

Diapause is a stage of suspended DEVELOPMENT to cope with unfavourable conditions. HIBERNATION or winter SLEEP is a resting stage where in ANIMALS escape winters (cold) by hiding themselves in their shelters.

Explanation:

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Answer:

1)  The protoplasm cannot be analysed chemically because it has complex organic and living cell organelles which can disintegrate if chemicals are added to analyse. Also due to complexity of physical and chemical properties the ULTIMATE chemical nature of protoplasm cannot be determined.

2)The main difference between organ and organelle is that organ is a large part of an organism, composed of tissues which perform similar functions whereas organelle is a specialized structure found inside cells, which carries out a SPECIFIC life process.  Organelles occur in all eukaryotes.

3)The cells of an elephant would be of the same size as the cells of a rat. The size of cells does not vary within the ORGANISMS, however, the number of cells varies from one organism to another. A larger animal like an elephant will have the number of cells as compared to a smaller animal like a rat.

4)(a) Protoplasm and cytoplasm - Protoplasm is the content of the cell including the cell MEMBRANE, cytoplasm and the cell nucleus whereas cytoplasm is the jelly-like substance surrounding the nucleus within the cell membrane. The cytoplasm contains the cell organelles like mitochondria, ribosomes etc.

(b) Nucleolus and nucleus - The nucleolus is a structure found in the nucleus of cells and it forms around specific chromosomal regions in the nucleus of eukaryotic cells and is made up of proteins and ribonucleic acids. The nucleus is a membrane-enclosed organelle found in eukaryotic cells.  

(c) Centrosome and chromosome - Centrosome is an organelle in the cell which is responsible in the division of cells. While chromosomes are highly condensed coiled chromatin fibers that is present inside the nucleus.

(d) Cell wall and cell membrane - Cell wall is found only in plant cells and is made up of cellulose whereas cell membrane is found in both plant and animal cells and is made up of lipids and proteins.

(e) Plant cell and animal cell - Animals cells store energy in the form of the complex carbohydrate glycogen. Plant cells store energy as starch.

(f) Prokaryotes and eukaryotes - Eukaryotic cells CONTAIN membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.

Explanation:

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YES the CANCER is INFECTIOUS

➠ AnSwer :-

➝ Mitochondria :-

• Mitochondria are the 'electric GENERATORS' of cells.
• They take oxygen and produce carbon dioxide TOGETHER with ATP, the fuel of most of the activities of the cell.
• Because they take oxygen and RELEASE CO2, it is easy to think they 'breathe'.

Answer:

In a leaf-

transport of WATER

In the HUMAN body-

Osmosis occurs to recover water from WASTE material

Explanation:

ANSWER:

NON INFECTIOUS DISEASE is PNEUMONIA

ANSWER:

FREQUENCY of recessive allele in the population is 40% MEANS 0.4. p = 0.6, So, frequency of dominant allele is 0.6

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ANSWER:

Plants absorb minerals in ionic form: nitrate (NO3−), phosphate (HPO4−) and potassium IONS (K+); all have difficulty CROSSING a charged PLASMA membrane. It has long been known plants expend energy to actively take up and concentrate mineral ions.

Explanation:

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BACTERIA are LIKE EUKARYOTIC cells in that they have cytoplasm, ribosomes, and a plasma membrane. FEATURES that distinguish a bacterial cell from a eukaryotic cell include the circular DNA of the nucleoid, the lack of membrane-bound organelles, the cell wall of peptidoglycan, and flagella.

Answer:

The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood. It is composed of four subunits, each with a heme group plus a globin chain. The heme group is composed of a porphyrin ring which contains an iron (Fe) atom in its center. Normally, the Fe is in the +2 redox state (FERROUS) and can reversibly bind oxygen. There are at least six genes that control globin synthesis in humans, resulting in the formation of six structurally DIFFERENT polypeptide chains that are designated α, β, γ, δ, ξ, and ς chains. All normal and most abnormal hemoglobin molecules are tetramers consisting of two different pairs of polypeptide chains, each chain forming a monomeric subunit.

The blood of a normal adult human contains at least six different species of hemoglobin molecules, all of which have the same principal structure and function. Hemoglobin A (A for adult) makes up 92% of the total hemoglobin concentration in a normal adult human. To date, approximately 200 structurally different human hemoglobin variants have been reported. These abnormal hemoglobins (relative to hemoglobin A) often have different oxygen-binding properties.

Hemoglobin A (HbA) is composed of two α chains and two β chains, symbolically written as α2 β2. Its molecular weight is 64,400 Da. Each a chain has 141 amino acids, and each β chain has 146. The concentration of Hb inside red blood cells is 330 g/l (= 33 g%). At a hematocrit of 45%, this YIELDS a blood [Hb] of 150 g/1 or 15 g%. The structure of the Hb molecule has been elucidated by the x-ray crystallographic work of Perutz and his co-workers [14,30]. The α and β chains are arranged in αβ pairs, and any conformational change in one polypeptide chain is transmitted to the others in the molecule. There are two different arrangements of the subunits within the tetramer that are much more STABLE than all others. One of these two quaternary conformations predominates when the iron atoms are saturated with oxygen (oxy structure), and the other predominates when these binding sites are vacant (deoxy structure). The deoxy structure is characterized by the presence of inter- and intrasubunit salt bridges which give it a constrained or taut (T) configuration. The oxy conformation is obtained when the salt bonds are broken so as to give the tetramer a relaxed (R) quaternary structure.

When the iron atom in the heme group becomes oxidized (loses an electron), its valence state changes from +2 (ferrous) to +3 (ferric). The hemoglobin is then called methemoglobin (metHb) or ferrihemoglobin (Fe+3 will not bind oxygen). Ordinarily, about 1% of the hemoglobin in a red blood cell is in this form. The level of metHb is maintained at this low level primarily by the enzyme NADH-methemoglobin reductase. It is important that the level of metHb be kept low since it will not reversibly bind oxygen and thus cannot carry oxygen.

Explanation:

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The NET movement of molecules remain in equilibrium when a cell is placed in isotonic medium.

Explanation:

• An isotonic medium can be described as the medium in which the concentration of solutes is same in the call as COMPARED to outside of the cell. As a result, the molecules do not move in or out of a cell.

• A CHANGE in the concentration of the solutes will cause the cell to lose its equilibrium and become either HYPOTONIC or hypertonic depending on the change which OCCURRED.

Answer:

They are TYPICALLY found in the fleshy fruits, FLOWERS as well as various other pigmented parts of the plant such as leaves. With such PIGMENTS as carotenoids accumulating in chromoplasts, the plastids PLAY an important role in pollination given that they act as visual attractors for animals INVOLVED in pollination. Plastids present in Plants... .

Explanation:

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The nucleus is a double-membraned ORGANELLE FOUND in all eukaryotic cells. It is the largest organelle, which functions as the CONTROL centre of the cellular activities and is the storehouse of the cell's DNA. By structure, the nucleus is dark, round, surrounded by a nuclear membrane.

...

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HCL

PEPSIN

MUCUS

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Answer:

When a receptor is stimulated, it sends a signal to the central nervous system, where the brain coordinates the response. But sometimes a very quick response is needed, one that does not need the involvement of the brain. This is called as the reflex action. In a simple reflex action:

STIMULUS -> Receptor -> Sensory NEURON -> Relay Neuron -> Motor neuron -> EFFECTOR (Muscle).

So, the correct answer is 'Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle'

ANSWER:

hydrilla

Explanation:

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ANSWER:

D- all

Explanation:

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Answer:

Chromosomes are thread-like STRUCTURES located inside the nucleus of animal and plant CELLS. Each chromosome is made of protein and a single MOLECULE of deoxyribonucleic ACID (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.

Explanation:

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ANSWER:

C) SPINAL CORD.........

Answer:

bodies naturally produce both digestive and metabolic enzymes, as they are needed. Enzymes are protein chemicals, which carry a vital energy FACTOR needed for every CHEMICAL action, and REACTION that occurs in our body. There are approximately 1300 different enzymes found in the human cell.

Explanation:

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Answer:

The MEDULLA oblongata HELPS control breathing, heart and blood vessel function, sneezing, digestion, and swallowing. This PART of the brain is a CENTER for RESPIRATION and circulation. Actions such as blood pressure, salivation and vomiting are controlled by the Medulla.

Explanation:

Medulla

ANSWER:

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ANSWER:

where are the FOLLOWINGS MATE....

your QUESTION is INCOMPLETE

ANSWER:

a response

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EXPLANATION:

UR ANSWER is MUSCLE TISSUE.

Answer:

in english:-

It is necessary in mammals and birds to separate oxygenated and de-oxygenated blood because this MAKES their CIRCULATORY system is more EFFICIENT and helps in maintaining constant body temperature.

in hindi:-

स्तनधारियों और पक्षियों में ऑक्सीजन युक्त और डी-ऑक्सीजन युक्त रक्त को अलग करना आवश्यक है क्योंकि इससे उनकी संचार प्रणाली अधिक कुशल होती है और शरीर के निरंतर तापमान को बनाए रखने में मदद करती है।

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Answer:

Explanation:

9 Ways to Boost Your Body's Natural Defenses

Get enough sleep. Sleep and immunity are closely tied. ...

Eat more WHOLE plant FOODS. ...

Eat more healthy fats. ...

Eat more FERMENTED foods or take a probiotic supplement. ...

Limit added SUGARS. ...

ENGAGE in moderate exercise. ...

Stay hydrated. ...

Manage your stress levels.

➠ AnSwer :-

➝ FUNCTIONS performed by testes in HUMAN beings :-

• The testicles are the male gonads
• the PRIMARY male reproductive organs.
• They have two, very important functions that are very important to the male reproductive system: they PRODUCE gametes, or sperm, and they secrete hormones, PRIMARILY testosterone.

ANSWER:

both a and c

Explanation:

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ANSWER:

'C' is the CORRECT answer

A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (literally without tail in Ancient GREEK). The oldest fossil "proto-frog" appeared in the early Triassic of Madagascar, but molecular clock dating suggests their origins may extend further back to the Permian, 265 MILLION years ago. FROGS are widely distributed, ranging from the tropics to subarctic regions, but the greatest concentration of species diversity is in tropical rainforest. There are over 6,300 recorded species, accounting for around 88% of extant amphibian species. They are ALSO one of the five most diverse vertebrate orders. Warty frog species tend to be called toads, but the distinction between frogs and toads is INFORMAL, not from taxonomy or evolutionary history. All toads are frogs, but not all frogs are toads.

Answer:

The Adam's APPLE is a lump of CARTILAGE that sticks out from the throat. It is more prominent in males, and it serves no specific function. A PERSON can remove or change the size of their Adam's apple with surgery. Adam's apples develop during puberty and are not present in prepubescent children.

Explanation:

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➠ AnSwer :-

➝ Release neurotransmitter

• An axon also known as a nerve fibre, is a long, SLENDER projection of a nerve cell, or NEURON, that typically CONDUCTS electrical impulses away from the neuron's cell body. The function of the axon is to transmit information to different neurons, muscles and GLANDS. The space between two neuron is known as synapse. The nerve impulse is transmitted towards the synaptic terminal from the dendron.

Answer:

TAXON :

CLASSIFICATION involves hierarchy of steps in which each step REPRESENTS taxonomic category. Each taxonomic category is REFERRED to as a unit of classification and is commonly termed as taxon (pi.: taxa).

Taxonomic hierarchy :

Taxonomic hierarchy is a system of arranging all taxonomic categories in descending order with kingdom at the top and species at the base.

As we go up the taxonomical hierarchy, the number of INDIVIDUALS increases but the number of common characteristics goes on decreasing.

ANSWER:

C- QUESTION inappropriate

Explanation:

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Answer:

tex]

ANSWER:

corona VIRUS is DANGER virus in world if we TAKE some measure precautions we will be SAFE