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Chordate Affinities:Cephalochordata (BRANCHIOSTOMA) exhibits the three basic chordate features such as notochord, DORSAL TUBULAR nerve cord and pharyngeal gill-slits in the most TYPICAL manner and there is no DOUBT about its chordate nature.

tion: The sex chromosomes in birds are DESIGNATED Z and W, and the male is the homomorphic sex (ZZ) and the FEMALE heteromorphic (ZW). ... The weight of evidence suggests that sex DETERMINATION in birds is by a genic balance MECHANISM, in which the ratio of autosomes to Z chromosomes is the crucial factor.

the pollen tube is siphonogamous and its main FUNCTION is to carry the male gametes for double fertilization. In some TAXA, as in Cucurbitaceae, the tube branches after entering the ovule, prior to fertilization. The tube may even swell and form a bulla.The ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal HORMONES of the reproductive cycle.Pollen grains carry male reproductive cells (gametes) in a plant and are haploid microgametophytes. Their main function is in the transferring of the male gametes to their female counterparts (OVULES – female reproductive cells) in the EMBRYO sac. It thereby facilitates sexual reproduction to occur in the plant.

ng up on their hind LEGS allowed our ancestors to FIGHT with the strength of their forelimbs, making punching MUCH more dangerous.” In Carrier's view, this allows them to unleash the full force of their powerful and dexterous front legs on their OPPONENT

sis is the splitting of water molecules in the PRESENCE of light into PROTON, ELECTRON and oxygen. It TAKES place during non-cyclic photophosphorylation. The protons are USED to reduce NADP and electrons are fed to photosystem II. Oxygen is released as a waste product.

In 1859, Charles DARWIN set out his theory of evolution by NATURAL selection as an EXPLANATION for adaptation and speciation. He defined natural selection as the "principle by which each slight VARIATION [of a trait], if USEFUL, is preserved".

Follow label DIRECTIONS carefully. Avoid splashing, SPILLING, leaks, spray drift, and contamination of clothing. NEVER eat, smoke, drink, or chew while using pesticides. Provide for emergency MEDICAL CARE IN ADVANCE as required by REGULATION. please mark me brainlist

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in PHYSIOLOGY, a level of organization in multicellular organisms; it consists of a group of structurally and FUNCTIONALLY SIMILAR cells and their intercellular material. ... xylem; Scots pine. A MICROSCOPIC view of a Scots pine tree (Pinus sylvestris) showing cells of the xylem tissue.

the ways to increase FRICTION are by making the surface rough by INCREASING the the mass of the object.by applying more force on that object.hope this answer will help you by the WAY the gun is real that you have holdin your HAND.

In binary fission, the parent cell DIVIDES itself into two equal and identical daughter CELLS. It is the most common form of REPRODUCTION in prokaryotes such as BACTERIA. In multiple fission, a single parent cell is divided into many daughter cells.

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tion:Alternation of generations (also known as METAGENESIS) is the type of life cycle that occurs in those PLANTS and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages. In these groups, a multicellular haploid gametophyte with N chromosomes alternates with a multicellular diploid sporophyte with 2n chromosomes, made up of n pairs. A mature sporophyte produces haploid spores by meiosis, a PROCESS which reduces the number of chromosomes to half, from 2n to n.. . Please mark me as BRAINLIEST

The AORTA is the LARGEST artery in the body. It carries oxygenated blood from the LEFT ventricle of the heart into systemic circulation. The aorta has many subdivisions that branch off into SMALLER ARTERIES.

Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a NATURAL or an INDUSTRIAL means to a form of nitrogen such as ammonia. In nature, most nitrogen is HARVESTED from the ATMOSPHERE by microorganisms to form ammonia, NITRITES, and nitrates that can be used by plants.Explanation:please mark as brilliant

YesExplanation:Today, a medical student is likely to be drug tested before entering medical SCHOOL, before CLINICAL ROTATIONS, and/or before residency. If preventing drug use among medical STUDENTS is the goal of these TESTS, they have failed miserably.

melanocytesExplanation:it is the pigment that defines the colour of your EYES, skin and HAIR

The NUMBER of images of an OBJECT placed between two mirrors can be FOUND from the following formula. When the angle between the mirrors is 90°, the number of images is (360/90°)-1 = 4-1 = 3. Similarly, when the angle is 60°, the number of images is (360/60°)-1=6-1 = 5.hope this helps you mate!

The lymphatic system has three functions:The removal of excess fluids from body TISSUES. ...Absorption of FATTY ACIDS and subsequent transport of fat, CHYLE, to the circulatory system.Production of IMMUNE cells (such as lymphocytes, monocytes, and antibody producing cells called plasma cells).

teria, such as M TUBERCULOSIS, are aerobic, non–spore-forming, nonmotile, facultative, CURVED INTRACELLULAR rods measuring 0.2-0.5 μm by 2-4 μm.

spermExplanation:MALE PRODUCE soerm and WOMEN produce EGG or OVA

(C) both (a) and (B) I HOPE it HELPS

मैमेलिया वर्ग के चार प्रमुख लक्षण बताइये। शरीर पर बालों को पाया जाना । . बाह्य कर्ण उपस्थित। मादाओं में विकसित स्तन ग्रन्थियों का पाया जाना । .

The expression of TRAITS in an offspring is determined by dominant and RECESSIVE genes. For example, in case of eye COLOUR, the GENE for BROWN eyes is dominant and that for blue eyes is recessive.

The centrometre Explanation:Because each duplicated chromosome CONSISTS of two identical sister chromatids JOINED at a point CALLED the CENTROMERE, these structures now appear as X-shaped BODIES when viewed under a microscope.

wer is in the image ATTACHED..HOPE it will HELP you a LITTLE...

वर्ग स्तनी के तीन प्रमुख लक्षण तथा इसके दो उदाहरण लिखिए।

Phospholipids are MOSTLY made from glycerides by substituting one of the THREE fatty acids by a phosphate group with some other molecule ATTACHED to its end. The other form of phospholipids is SPHINGOMYELIN, which is derived from sphingosine instead of glycerol

Amino acids are organic COMPOUNDS that COMBINE to FORM proteins. Amino acids and proteins are the building BLOCKS of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to HELP the body: Break down food.Explanation:Please thanks my answer

आवृतबीजी में बीज का उत्पादन फूलों के पौधों द्वारा किया जाता है और अंडाशय के भीतर संलग्न होता है जबकि अनावृतबीजी में बीज गैर-फूलों वाले पौधों द्वारा निर्मित होता है और ये अप्रकट या नग्न होते है। ... # अनावृतबीजी पौधों का प्रजनन हवा पर निर्भर करता है जबकि आवृतबीजी पौधों का प्रजनन जानवरों पर निर्भर करता है.

tion:A museum (/mjuːˈziːəm/ mew-ZEE-əm; pluralmuseums or, RARELY, musea) is an INSTITUTION that cares for (CONSERVES) a collection of artifacts and other objects of artistic, cultural, historical, or SCIENTIFIC IMPORTANCE.

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