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ong>Answer:

The PLASMA membrane is called a selectively permeable membrane as it permits the movement of only certain MOLECULES in and out of the cells. ... If plasma membrane RUPTURES or breaks down then molecules of some SUBSTANCES will FREELY move in and out of the cells.

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Both A and B are correct

When we are in a moving train, we see the co-passengers travelling with us also at rest. But when we are STANDING at platform, we see the passengers sitting in a moving train as moving OBJECTS.

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circulatory system, also CALLED the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

The circulatory system includes the lymphatic system, which circulates lymph.[1] The passage of lymph takes much longer than that of blood.[2] Blood is a fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart through the vertebrate vascular system, carrying oxygen and nutrients to and waste materials away from all body tissues. Lymph is essentially recycled excess blood plasma after it has been filtered from the interstitial fluid (between cells) and returned to the lymphatic system. The cardiovascular (from Latin words meaning "heart" and "vessel") system comprises the blood, heart, and blood vessels.[3] The lymph, lymph nodes, and lymph vessels FORM the lymphatic system, which returns filtered blood plasma from the interstitial fluid (between cells) as lymph.

The circulatory system of the blood is seen as having two components, a systemic circulation and a pulmonary circulation.[4]

While humans, as well as other vertebrates, have a CLOSED cardiovascular system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open cardiovascular system. The lymphatic system, on the other hand, is an open system providing an accessory route for excess interstitial fluid to be returned to the blood.[5] The more primitive, diploblastic animal PHYLA lack circulatory systems.

insulin.

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Regurgitating food after a meal and then swallowing and DIGESTING some of it. Cattle and other ruminant ANIMALS have a four-chambered STOMACH for the rumination of food and so can chew their cud.

Explanation:

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ong>Answer:

Meristems are specialised regions of plant growth. It HELPS the plant to grow. The meristems mark the regions where active CELL division and rapid division of cells take PLACE. Meristems are of three types depending on their location.

# Apical meristem:

It is present at the root apex and the shoot apex. The shoot apical meristem is present at the tip of the shoots and its active division results in the elongation of the stem and FORMATION of new leaves. The root apical meristem helps in root elongation.

# Intercalary meristem:

The intercalary meristems are located at the internodes or the base of the leaves. The intercalary meristems help in increasing the length of the internode. This is usually seen in monocotyledonous plants.

# Lateral meristem:

The lateral meristems are present on the lateral side of the stem and root of a plant. These meristems help in increasing the thickness of the plants..................

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The MALE has reproductive organs, or genitals, that are both inside and outside the pelvis. The male genitals INCLUDE:

the testicles (TESS-tih-kulz)

the duct SYSTEM, which is made up of the epididymis and the vas deferens

the accessory glands, which include the seminal vesicles and prostate gland

the penis

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Explanicecreamyouscreamwescreamation:

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ong>Answer:

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Uremia occurs when your KIDNEYS become damaged. The toxins, or bodily waste, that your kidneys normally send out in your urine end up in your bloodstream instead. These toxins are known as CREATININE and urea. Uremia is a SERIOUS CONDITION and, if untreated, can be life-threatening

Explanation:

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ong>Answer:

Aerobic RESPIRATION is a set of metabolic REACTIONS that take place in the presence of oxygen, occurring in a cell to convert CHEMICAL energy into ATPs. Anaerobic respiration is a process of cellular respiration where the HIGH energy electron acceptor is neither oxygen nor PYRUVATE derivatives.

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ong>Answer:

Water that contains less amount of impurities and is FIT for drinking is CALLED POTABLE water.

ong>Answer:

Blood group of PARENTS Blood group of child

A and A A, O

A and B A, B, AB, O

A and AB A, B, AB

A and O A, O

B and B B, O

B and AB A, B, AB

B and O B, O

AB and AB A, B, AB

AB and O A, B

O and O O

Explanation:

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i did not SHOWING this PHOTO

June

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ong>Answer:

A CELL consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.

Cell membrane

Every cell in the body is enclosed by a cell (Plasma) membrane. The cell membrane separates the material outside the cell, extracellular, from the material inside the cell, intracellular. It maintains the INTEGRITY of a cell and controls passage of materials into and out of the cell. All materials within a cell must have access to the cell membrane (the cell's boundary) for the needed exchange.

Nucleus and Nucleolus

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain DEOXYRIBONUCLEIC ACID (DNA), the genetic material of the cell. The nucleolus is a dense region of ribonucleic acid (RNA) in the nucleus and is the site of ribosome formation. The nucleus determines how the cell will function, as well as the basic structure of that cell.

Cytoplasm

The cytoplasm is the gel-like fluid inside the cell. It is the medium for chemical reaction. It provides a platform upon which other organelles can operate within the cell. All of the functions for cell expansion, growth and replication are carried out in the cytoplasm of a cell. Within the cytoplasm, materials move by diffusion, a physical process that can WORK only for short distances.

AMOEBA

EXPLANATION:

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Mujhe aata hai [ NCERT CLASS 9 Science CHAPTER 5 Question 5]

Explanation:

Which organelle is known as the powerhouse of the cell. Why?

Ans)Mitochondria are tiny organelles INSIDE cells that are INVOLVED in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.

ong>Answer:

Explanation:

The GYNOECIUM is the innermost whorl of a flower; it CONSISTS of (one or more) pistils and is TYPICALLY surrounded by the pollen-producing REPRODUCTIVE organs, the stamens, collectively called the androecium.

-5

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ong>Answer:

camel

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Earth worm

Explanation:

ODD one is EARTHWORM because it belongs to the Phylum - Annelida. ... While Tape worm, planaria and liver fluke belongs to Phylum-Platyhelminthes.

By sneezing, our body tries to expel the dust particles from the air we INHALED so that only CLEAN air ENTERS our body.

ong>Answer:

Smooth muscle is non-striated, although it CONTAINS the same MYOFILAMENTS they are just ORGANIZED differently, and involuntary. Smooth muscle myocytes are SPINDLE shaped with a single centrally located nucleus. ... Both cardiac and smooth muscle are involuntary while SKELETAL muscle is voluntary.

C ans 2nd COLUMN 3line of this

ong>Answer:

Karl Landsteiner

Introduction. It was not until the year 1900, when Karl Landsteiner at the University of VIENNA, discovered why some BLOOD transfusions were successful while others could be deadly. Landsteiner discovered the ABO blood group system by mixing the RED cells and SERUM of each of his staf

Insects (mosquitoes, lice, fleas, bed bugs) and ticks are able to transmit a number of diseases caused by INFECTIOUS agents: viruses (chikungunya virus, yellow fever, dengue fever, etc.), bacteria (Lyme disease, plague, etc.), PARASITES (malaria, sleeping sickness, LEISHMANIASIS, filariasis, etc.).

Explanation:

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The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed EASILY. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.

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Striated MUSCLES are those muscles that have stripes in them; they are arranged PARALLEL to each other in a definite manner. All the striated muscles are skeletal muscles and cardiac muscles. In striated muscles, there are sarcomeres. Sarcomeres are the basic UNIT or contractile ELEMENT of the muscle.

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TRUE is your answer MATE..

yes....

Explanation:

Some food-borne illnesses could be due to FUNGI or their byproducts, such as poisoning by mushrooms or MYCOTOXINS. Some fungi that contaminate or spoil food are known pathogens, such as Alternaria, Aspergillus, CANDIDA, Fusarium, and mucormycetes

ong>Answer:

Nature of science (NOS) is a critical component of scientific literacy that enhances students' understandings of science concepts and enables them to make informed decisions about scientifically-based PERSONAL and SOCIETAL issues.

Scientific knowledge is TENTATIVE (subject to change).

Science is empirically based (based on or derived from observation of the natural world).

Science is inferential, imaginative and creative.

Science is subjective and theory laden.

Explanation:

ong>ANSWER:

Co2 is produced by FERMENTATION of yeast which makes the BREAD flufy

ong>Answer:

Deforestation MEANS cutting down of trees or forests. We know that trees transpire and play an important role in the water cycle as it adds MOISTURE to the air which brings rainfall. ... This soil will be dry and leads to lower water intake in the trees. This will cause soil erosion and will LEAD to floods.

Explanation:

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ong>Explanation:

In biology, adaptation has three related meanings. Firstly, it is the dynamic evolutionary process that fits organisms to their ENVIRONMENT, enhancing their evolutionary fitness. Secondly, it is a state reached by the POPULATION during that process.

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ong>Explanation:

FISHES have SPECIAL breathing ORGANS CALLED gills

no............

not...........

NEVER......

ong>Answer:

Explanation:

In coelenterates, specialised cells CALLED CNIDOBLASTS are present, which contain STINGING cell organelles called nematocysts. Nematocysts HELP to paralyse or hold the prey by injecting poison present WITHIN it.

symmetry is a symmetry in which the SIDES exhibit CORRESPONDENCE or REGULARITY of parts AROUND a central axis. It is lacking left and right sides. It is in contrast to BILATERAL symmetry that is more common than radial symmetry.




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rong>We call plasma MEMBRANE as selectively permeable due to the following reasons:

Explanation:

• Plasma membrane is made up of phospholipid bilayer which selectively allows materials to ENTER inside or outside the cell.

• Plasma membrane is called selectively permeable as it allows specific entry of materials inside the cell.

• Small molecules can easily pass through the plasma membrane.

• For passing of LARGE molecules, CARRIER molecules (carrier proteins) are required along with energy in the form of ATP.

Human EYE normally 28.35 GRAM

Plant Parts

Each part of a plant has a job that will help it grow. The roots grow down into the soil to hold the plant in the ground, and they also ABSORB water and FOOD from the soil. ... The stem then carries this sugar from the leaves to the rest of the plant so fruits and flowers can grow and make new SEEDS

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ong>Answer:

* FORCE CHANGES DIRECTION OF MOTION - EXAMPLE

When a ball hits against a wall, it bounces back in the opposite direction. So the force exerted by the wall on the ball changes its direction of motion.

* FORCE CHANGES SHAPE OF OBJECT - EXAMPLE

When a HAMMER STRIKES a hot rod, the rod bends. The force exerted by the hammer on the rod changes the shape of the rod.

* FORCE CHANGES DIRECTION OF MOTION - EXAMPLE

When a ball hits against a wall, it bounces back in the opposite direction. So the force exerted by the wall on the ball changes its direction of motion.

* FORCE CHANGES SHAPE OF OBJECT - EXAMPLE

When a hammer strikes a hot rod, the rod bends. The force exerted by the hammer on the rod changes the shape of the rod.

* Can change the state of an object(REST to motion/ motion to rest):For example, pushing a heavy stone in order to move it.

* May change the speed of an object if it is already moving.For example,catching a ball hit by a batsman. * May change the direction of motion of an object.For example,footballer kicks a moving ball to change its direction.

* May bring about a change in the shape of an object.For example, blowing air in balloon.

* May cause some or all of these effects.

* FORCE CAN CHANGE THE DIRECTION OF AN OBJECT - EXAMPLE

A side wind can change the direction of a BOAT sailing in a sea.

* FORCE CAN CHANGE THE SPEED OF AN OBJECT - EXAMPLE

Blowing wind or wind storm can change the speed of moving car.

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