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a)male gamete- spermb) female gamete- ovum/egg

male:- sporogenous tissue female:- embryo sac

Ovary: female reproductivestructure of flowerthat usuallydevelops intothe fruit. Pericarp: fruit tissues surrounding theseedsthat are derived from the ovary. Ovule: egg-bearingstructureof theflowerthatdevelops intoaseed.

A few examples of such flowers include Hibiscus, Sunflower, Rose, Lily, Tulip, and Daffodil.

A stamen is a part of the male reproductive system in a flower and a carpel is a part of the femalereproductive system in a flower. Bisexual or perfectflowers have bothmale (androecium) and female (gynoecium) reproductive structures, includingstamensand an ovary.

There are many flowers which have both stamens and carpels together in the same flower.

this is 1mark

1. True 2. True3. True4. False (a sperm and an egg fuse to form a diploid cell, known as a zygote)5. True

4 . false and all true

Butterfly ________ its food

It are present outside the body.

The mainhormone secretedby the testesis testosterone, an androgenic hormone. Testosterone issecretedby cells that lie between the seminiferous tubules, known as the Leydig cells. Testosterone is important in the first stages of developing the male reproductive organs in a foetus

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The hormone which is secreted by human testes is testosterone.It's functions : This is a hormone which is responsible for the development of the male reproductive tissues and organs. It is also responsible for the growth and development of the secondary sexual characteristics like the growth and development of the muscles and bones.

Living-human,animals,plants,insects,fishesNon living-stone,table,chair,bed, TV

There is no such body part in human body without cell. Differentcellshave different jobs to do. Eachcellhas a size and shape that is suited to its job.Cellsthat do the same job combine together to form bodytissue, such as muscle, skin, or bone tissue. Groups of different types ofcellsmake up the organs in your body, such as your heart, liver, or lungs.

There is no true internal body cavity or coelom,in which well development organs can be accommodated. They are either free livingor parasitic.

General characteristics of phylum Platyhelminthes

(Platys: flat; helminthes: worms)

Kingdom: Animalia

Habitat: mostly parasitic, few are free living in sea water or fresh water

Grade of organization: Organ- system grade of organization

Symmetry: Bilateral symmetry and Body is dorso-ventrally flattened

Germ layer: Triploblastic. Ectoderm is very specialized with distinct epidermis

Coelom: Absent (acoelomate).

Digestive system: incomplete or absent

No mouth (oral opening directly into pharynx).

No true stomach structure (pharynx opens into a complex “intestinal” structure).

In tapeworms, Direct absorption of soluble nutrients by cells and tissues.

Excretory system: Protonephridia with Flame cell

Respiration: by simple diffusion of gases through body surface

Circulatory system: Absent

Reproduction

Sexual: by gamatic fusion in hermaphrodite species

Asexual : by regeneration and fission

Fertilization: internal.

Life cycle is complex involving one or more hosts.

Excretory organ:

It is a single proboscis gland or glomerulus situated in the pro­boscis

The given figure must be representing the food chain.

In the ecosystem, a food chain shows the lower order living thing to higher order living thing.

Lower order living things acts as a food to the next level of the living thing.

Generally, lower order living things are green plants and higher order being predators.

Below may be an example of food chain:

Banana plant, Squirrel, Kite, Anaconda.

Here, Squirrel feeds on banana plant; Kite (a bird of prey) eats the squirrel and finally the larger snakes like Anaconda may swallow the Kite.

Banana plant --> Insect --> Kite --> Vulture

circulatory system is found in both plants and animals

circulatory system ,in animal it consist of heart and blood vesselsand in plant it consist of xylem and phloem

Question:

Which organ system is found in both animals and plants?

Biology:

Plants and animals are very different from one another, but they also have important similarities. Both are living things, and both have organ systems that are necessary for survival.

Answer and Explanation:

Plants and animals both have respiratory systems, reproductive systems, and circulatory systems. However, they can be quite different from one another. Many animals, for instance, breathe in oxygen through lungs or gills. Most plants, on the other hand, absorb carbon dioxide and emit oxygen in addition to oxygenic respiration.

The reproductive systems of plants and animals differ as well. Most animals have males and females. The males produce sperm, and the female eggs. Plants have several different ways of reproducing. Some plant species have separate male and female sexes. Others have both male and female parts within the same plant.

The circulatory system in animals with blood would consist of a pump (heart) that would allow the blood to circulate throughout the body. On the other hand, plants rely on capillary action and gravity to transport water and nutrients.

consists of heart and blood vessels. It primarily circulates oxygen and nutrients throughout the body and also helps in removing metabolic waste such as carbon dioxide from the body.

In plants, the circulatory system consists of xylem and phloem. Xylem helps in transporting water and minerals from roots to the leaves. Phloem helps in circulating food from leaves to other parts of the plants.

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Turtles.These are numerous species of turtles that may live on both land and water, like the European pond turtle. Terrapins tend to live in fresh or brackish water.

Above water

Most amphibians.Many only live in water as infants, while others are semiaquatic and can comfortably switch throughout their lifetime.

Frogs.Salamanders. Newts (a type of salamander.)Toads.Caecilians.

Now, ontomammals.The otter!The beaver.The walrus.The platypus.

Birds.In fact, there is an entire family of them: Anatidae, the waterfowl:

Ducks.SwansGeese

There are others, like polar bears, marine iguanas, water monitors, and so on, but at this point I think I’ve sufficiently shown the amazing diversity of semiaquatic animals that reside on this planet. It makes sense, after all. Land covers 29% of Earth’s surface. Water covers the remaining 71%.

Bony fish live in fresh air, sea water and brackish environments.The salinity of sea water is about 35 part per thousands.

Thebody of bony fish is streamlinedbecause. ... thestreamlinedshape of thebodyacts as aerodynamic regulator i.e, more thestreamlinedshape,more easier for thefishto swim. this is much more also useful when thefishflows against the currents.

The most commonHydroelectric powerplant uses an “Impoundment.” This is where a dam is built across a river which impounds thewaterbehind it in a reservoir. Thiswateris then released from the reservoir through a turbine, which spins and activates a generator whichproduces electricity

Hydroelectric PowerPlants. The most commonHydroelectric powerplant uses an “Impoundment.” This is where a dam is built across a river which impounds the water behind it in a reservoir. This water is thenreleasedfrom the reservoir through a turbine, which spins and activates a generator whichproduceselectricity.

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cockroaches - spiraclesbirds - lungsearthworm and leech - breathe through skin

cockroach in trachea, birds in lungs and earthworm and leech through moist skin

skin in cockroach lungs in birds,skin in earthworm,

cockroach-spiracles.birds-lungs.earthworm-skin.leech also skin.

The respiratory organ for cockroach is spiracles The respiratory organ for birds is lungsThe respiratory organ for earthworms is skin The respiratory organ for leeches is skin

(i) All respiratory organs have large surface area to get enough oxygen.

(ii) They are thin-walled for easy diffusion of gases and substances.

(iii) They have a rich supply of blood for transporting respiratory gases.

As carrot is an edible root, hence option (2) is correct.

the correct option is 4

edible part of cauliflower is its flower.

thank u for clearing my doubt =)

(c.) cauliflower is a ______flower

Chlorophyllis a pigment found in the thylakoid membranes of the chloroplasts in the leaves

In case of asexually reproducing organisms, mitosisis the method used for cell division and reproduction in cells. This process starts with onereplicationand one division of the chromosome material. The whole set of chromosomes is replicated and transferred to the next generation. This results in the chromosome numbers in the twocells produced, being the same as in the parent cell.Example: Reproduction inAmoebaby binary fission orPlasmodiumby multiple fission.

Sexually reproducing organisms undergo meiosis wherein the chromosome number is halved to form gametes. In this way, the new offspring receives one set of chromosome from each parent. The gametes then fuse together to form the zygote which restores the diploid chromosome number in the newly formed offspring. Example: Reproduction in human beings where there are 46 chromosomes in a diploid individual. Each parent contributes 23 chromosomes in the form of gametes. The two gametes fuse to form the zygote which again has 46 chromosomes.

Ans:- a. Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.

b. Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

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Artificial selection helps to produce organisms with desired trait or combination of traits.This method also explains us that different looking structures can evolve from the same origin. For example, different vegetables are evolved from wild cabbage. Some farmers wanted to select for very short distances between leaves, and have bred the cabbage we eat. Some wanted to select for arrested flower development, and have bred broccoli, or for sterile flowers, and have made the cauliflower. Some have selected for swollen parts, and come up with kohlrabi. Some have simply looked for slightly larger leaves and come up with a leafy vegetable called kale. So, cabbage, cauliflower, broccoli, kohlrabi and kale are descended from the same ancestor, wild cabbage by artificial selection.option d

If there are 16 offspring then out of them 3 will have first recessive and second dominant type genotype. So out of 1200 we will get 225 such offsprings

litchi belongs to soapberry family.

phenotypic ratio of dihybrid cross is 9:3:3:1tall and green plants will have ratio 3.on solving this we get total number of progeny =192

Mendelian genetics.

Colour blindness is X- linked recessive.

So,

A colour blind female has two X chromosomes- both of which are recessive- XrXr

A colour blind male has one recessive gene and one normal Y chromosome- XrYn.

So any progeny of the above couple will be colour blind since colour blindness is decided by the X chromosome.

Combinations there of:XrXr- female colour-blindXrYn- male colour-blindXrYn- male colour-blindXrXr- female colour-blind

This mode of inheritance makes sure that females rarely are ever colour blind.

soil erosion occurred by the flow of water or wind

Various methods of checking soil erosion are Strip cropping, Terrace farming, Contour ploughing

Soil erosion can be prevented by strip cropping, i.e. by growing different crops on the same field in different strips.

Terrace Farming is another common method that involves cutting down mountain slopes in small terraces to prevent washing away of soil.

Another common method is contour ploughing, that involves ploughing around contours of the slope to prevent erosion.

Soil fertility is the ability of soil to sustain plant growth and optimize crop yield. This can be enhanced through organic and inorganic fertilizers to the soil. Nuclear techniques provide data that enhances soil fertility and crop production while minimizing the environmental impact.

.Variants help the species to survive in all the conditions. .Environmental conditions such as heat, light, pests, and food availability can change suddenly at only one place. .At that time, only those variants resistant to these conditions would be able to survive. This will slowly lead to the evolution of a better adapted species. .Thus, variation helps in the evolution of sexually reproducing organisms.

oogonia is released in 30 year old lady

c)oogonia is the answer

(a) oogonia is write answer

oogonia (c) is correct answer

option c oogonia is correct

option c is absolutely correct

secondary oocyte because oogonia is before maturation of follicles.

A. Acquire traits are those characters which are obtained by body after birth.B. They are characters acquired by somatic cells not by germ cells.C. Awarenessness.

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HnRNA stands for heterogeneous nuclear RNA. As its name suggests, hnRNA is a term that encompasses various types and sizes of RNAs found in the eukaryotic cell nucleus. As you likely know, RNAs exist in many forms and carry out a wide range of functions. Messenger RNA (mRNA) is the only type of RNA that codes for proteins. Other types of RNA in eukaryotic cells include: ribosomal RNA (rRNA), transfer RNA (tRNA), small nuclear RNA (snRNA), micro RNA (miRNA), small interfering RNA (siRNA), and small nucleolar RNA (snoRNA).

Burningtobaccoproduces more than 4,000 chemicals, including nicotine, carbon monoxide, and tars.These chemicals can transformnormal cells into cancer cells.

Find out how:

Smoking changes your lungs and airways.

Quitting smoking can help reduce your risk of many health problems — from atroublesomecough to life-threateningconditions, like COPD andcancer.

Secondhand smokehas a harmful effect on your lungs.

Smoking causes significant changes in your lungs and airways. Some changes are sudden, lasting just a short time.Coldsand pneumonia are examples of this.Other, more chronic changes happen slowly and can last a lifetime— like emphysema.

Forestsalso influence climate, water cycle and air-quality. That iswhy forests are called“green lungs”. ... The plants provide oxygen for animal respiration and also absorb carbon dioxide from the atmosphere. In this way plants help in maintaining the balance of oxygen and carbon dioxide in the atmosphere.