myclass24
myclass24your class. your pace.
Q&A BANK

every question.
answered.

52 answers across CBSE, ICSE, and State boards - Class 1 to 12, every subject.

CBSEICSEState
SUBJECT
CLASS

Filtered results

52 TOTAL
BiologyClass 11CBSE

What are the external features of Julus (millipede)?

Head, collum, trunk, antenna, openings of odoriferous glands, walking legs, terminal spine or telson, anus.<img width="568px" height="204px" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAxgAAAEYCAYAAADf4lBNAAAQAElEQVR4AezdB5ymVXUw8Hv2U0OKEROTaGIBo4YoGlBji+ACRhCjrA01tiU2FAt2IhoB0SCW2LAXVMQKtthig0jU2EDsJYomEhONkK6JWb/534ez3H1439nZ3SnvzNz97Znn9nJuO+3ed8OWLVt+tmVLhy1bOg62bOk42LKl42DLlo6DLVs6DrZs6TjYsqXjYMuWjoMtWzoOtmzpONiypeNgy5b5cfDNb37zZ0ccccTPSik/2zD3p//vGOgYmEkM9EZ1DHQMdAx0DHQMdA

BiologyClass 11CBSE

What are the external features of a prawn and its commensal or parasitic associates Sacculina and Hermit crab?

Prawn: carapace, hepatic spine, antennal spine, antennule, antenna, maxillipede, chelate and non-chelate legs, telson, uropod, abdominal terga or pleura.Sacculina (parasite): abdomen of crab, peduncle of parasite, legs of crab, branchial region.Hermit crab (commensal): shell, crab, sea anemone<img width="335px;" height="409px;" src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/4gHYSUNDX1BST0ZJTEUAAQEAAAHIAAAAAAQwAABtbnRyUkdCIFhZWiAH4AABAAEAAAAAAABhY3NwAAAAAAAAAAAAAAAAAAAA

BiologyClass 11CBSE

What are the external features of Limulus

Median eye, lateral eyes, carapace of prosoma, mesosome, metasoma, immovable spines of mesosome, telson.<img width="423px;" height="422px;" src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/4gHYSUNDX1BST0ZJTEUAAQEAAAHIAAAAAAQwAABtbnRyUkdCIFhZWiAH4AABAAEAAAAAAABhY3NwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAA9tYAAQAAAADTLQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAlkZXNjAAAA8AAAACRyWFlaAAABFAAAABRnWFlaAAABKAAAABRiWFlaAAABPAAAABR3dHB0AAABUAAAABRyVFJDAAABZAAAAC

BiologyClass 11CBSE

What are the key stages in the life cycle of Ascaris?

Egg → 1st larva → 2nd larva → 3rd larva (lung) → 4th larva → young adult → adult male/female → egg capsule in feces.<img width="308px;" height="444px;" src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/4gHYSUNDX1BST0ZJTEUAAQEAAAHIAAAAAAQwAABtbnRyUkdCIFhZWiAH4AABAAEAAAAAAABhY3NwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAA9tYAAQAAAADTLQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAlkZXNjAAAA8AAAACRyWFlaAAABFAAAABRnWFlaAAABKAAAABRiWFlaAAABPAAAABR3dHB0AAABUAAAABRyVF

BiologyClass 11CBSE

What are the key stages in the life cycle of Taenia solium?

Egg → Oncosphere → Cysticercus (bladder stage) → Scolex → Adult worm (strobila with gravid proglottids).<img width="384px;" height="329px;" src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/4gHYSUNDX1BST0ZJTEUAAQEAAAHIAAAAAAQwAABtbnRyUkdCIFhZWiAH4AABAAEAAAAAAABhY3NwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAA9tYAAQAAAADTLQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAlkZXNjAAAA8AAAACRyWFlaAAABFAAAABRnWFlaAAABKAAAABRiWFlaAAABPAAAABR3dHB0AAABUAAAABRyVFJDAAABZAAAAC

BiologyClass 11CBSE

What are the external features of a scorpion?

Pedipalp, chelicera, lateral eyes, median eyes, carapace, prosoma, mesosome, metasoma, walking legs, terga, aculeus or stema, ampulla, sting or telson.<img width="339px;" height="435px;" src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/4gHYSUNDX1BST0ZJTEUAAQEAAAHIAAAAAAQwAABtbnRyUkdCIFhZWiAH4AABAAEAAAAAAABhY3NwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAA9tYAAQAAAADTLQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAlkZXNjAAAA8AAAACRyWFlaAAABFAAAABRnWFlaAAABKAAAABR

BiologyClass 11CBSE

What is the stepwise mechanism of urine formation in the nephron?

Ultrafiltration: removal of urea, uric acid, proteins, water, ions from blood; Tubular reabsorption: reuptake of amino acids, glucose, water, some ions; Tubular secretion: elimination of drug remains, H⁺, K⁺, creatinine, uric acid; Final urine: urea, uric acid, water, drug remains, creatinine, some ions.<img width="691px;" height="439px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA4gAAAI+CAYAAAD+VCQSAAAQAElEQVR4Aez9CbRt2VWeCa6z97n3vib6CPVCrUEKCSPBQxKgBhBOsGkKnFnOyiyGzQBjp03aAy

BiologyClass 11CBSE

What are the types and locations of nephrons in the human kidney?

Cortical nephrons: located in the cortex; Juxta-medullary nephrons: originate in the cortex and extend deep into the medulla.<img width="505px;" height="416px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAjsAAAHWCAYAAACR5EiaAAAQAElEQVR4Aex9B3wcxfX/051OvcuSLFvu3Ua2wWtjg43BdEwH04vpmOJAKoQUkhBICJCEjoGY3nvophlM9drGvctyL7Jk9XYq//dmdnZnd2f39mRB8v99QvY7773v+743s3unu7k9WQmljV/e+T/87xr87znwv+fA/54D/3sO/O858L/nwP/V50AI8L9IYqgsCBINHdn/Cwhyzl3SRPB6/pchCdfzH0NSqCxJQjL6/01IwfXEheRQWcr/UJaSgt

BiologyClass 11CBSE

What are the basic steps in urine formation in the nephron?

Ultrafiltration, tubular reabsorption, tubular secretion.<img width="540px;" height="426px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAlEAAAHUCAYAAAAa6X0oAAAQAElEQVR4Aey9BbwUZdQ//szsbN4OLvfSHaKEiIiEKKJiYKHYiYqFjd3dit1id6CgYqI0SHfH7a7Nqf85z8TOzM7s7gV93/f3/3g/c55zzvd8zznPxM48d/aK7PDhT8v/yX/H4L9r4L9r4L9r4L9r4L9r4L9r4L9roG3XAEuUHxnUf0LIf8fgv2Pw3zXw3zXw3zXwf/4a+O9e/d8z+//ENUC0RRScD9IEw39C/jsO/10H/10D/10D/10D/10D/10D/10DSa8BODzEtIgCgPmNEOa3jEz/Ck0CYO+v+KDGPy4Z/hV6TbT/X5F/41hAzf09R5

BiologyClass 11CBSE

What are the parts of a nephron in the human kidney?

Afferent arteriole, efferent arteriole, glomerulus, Bowman's capsule, PCT, DCT, peri-tubular capillary network, descending limb of Henle's loop, ascending limb of Henle's loop, Henle's loop, vasa recta, collecting duct, renal venule.<img width="502px;" height="455px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABBwAAAO4CAYAAABxseVzAAAQAElEQVR4Aey9C7xlV1Xmu88+r6o6dSqVVF5ADBQJL+UhcLQiYEoeNkrzlEfQDtJXbfHa2CCiYJq2uMptaRsfV+1u+177atuoSOPVRlFUUESriXCAEMQAIbwSIIS8n5U6VbXv+M85x1pzzjXnXH

BiologyClass 11CBSE

Tubular Reabsorption (Selective Reaborptlon)

The glomerular (tubular) filtrate contains some very useful substances like glucose, water and various ions.These substances are usetul for the body, hence must not pass out with urine.Therefore these are to be reabsorbed from the tubular lumen. This process of reabsorption of se

BiologyClass 11CBSE

What are the external and internal features of Bonellia?

Prostomium, ciliated groove, mouth, nephridiostome, alimentary canal, anus, anal vesicle, genital pore, cilia, sperm, ovary, setae.<img width="351px;" height="444px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAhAAAAKbCAYAAACkd7OSAAAQAElEQVR4AexdBXwUx/efvcvFCCFIIFgEK8WLu3uRosWKtkDx4kWLuxctXtzdizvBipYCIcGChxDil/zfd3Zns3e5JJeQAP3/yGffvjfvfd+bN7N7u7OzEl3JsjOjv9CXPviyD3zZB77sA1/2gS/7wJd9IDH7gI7Jf9HEvhBjX/rgSx982Qe+7ANf9oEv+8B/YB/45OcrJgYQTNJFB32hL33wZR/4sg982Qe+7ANf9oEv+0B8+wBNOPBF

BiologyClass 11CBSE

What are the external features of Dentalium?

Dorsal shell, shell, captacula, foot.<img width="226px;" height="444px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAeQAAAO2CAYAAAA5d+QsAAAQAElEQVR4Aey9Bbwc5fX/P7P37o27e0ISpEgpUNoCxQrFnSIpDsU1uGsgECQQ3EqhuLtDobi7BIgThehNbm6u/c/7mefMPmO7eyNt/98fvOYz55zP+ZzzPDO7O8/O7t6QW3+D0U2/4Jdz8Mtz4JfnwC/PgV+eA788B/67z4Gc98t/v5yBX87AL2fglzPwyxn45Qz818+AuyA3ymz+b8HzfjmeX87BL8+BX54DvzwHfnkO/K8/B2T59Tx3QfZyFf7U/y5yMn4MOYl/wdTccj0HFU4//F+Qy/3/7Rz88rrILdfXhD2fFY7F/69fE5fnNdmbmqtYQaiUvsuEpqm5yv9FNM

BiologyClass 11CBSE

What are the external features of a sea star (Asteroidea)?

Marginal spines, arms, terminal tentacle, central disc, madreporite, anus.<img width="342px;" height="448px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAggAAAKoCAYAAAAS4AeNAAAQAElEQVR4AexdBYAcVdJ+3TOz7pKsZSVO3AghBAseggUPdtyhd8jhHHrAIQcc7m6HuwZJgkSJEPdks5vd7Gaz7rtjf33V/Xp6enpWkk2A+4H+uqq++qre6x7pnu7ZiTp+4iP+P/DHPvjjOfDHc+CP58Afz4E/ngN/PAfMzwFVaP/5yfwBIf7YB3/sgz+eA388B/54DvzxHPgfeA7s9vFMyBMEoaj+xj/wxz744znwx3Pgj+fAH8+BP54D/7+fA3TBgBfjBAGRM6Fl0R/4Yx/89p4DrfS83IuI18eC7RG0LXKG9AH3e

BiologyClass 11CBSE

What are the external features of a leech?

Prostomium, eyes, mouth, anterior sucker, velum, nephridiopores, male and female genital pores, segmental receptor organs, posterior sucker, anus.<img width="307px;" height="456px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAsoAAARkCAYAAABrUDLkAAAQAElEQVR4Aex9B4AcR5V2dU/a2ZxzVM7ZtmzLsi3bck44BzBw5o58HBwcBxwH/GQDBwfYRAO2cc5ylqMky8o5p5U2a3Oenfy/r6arp7qnJ+xqJduc7P76vXrve69eVfd01/SMdtQzz/ll+DROz8Hpc+D0OXD6HDh9Dpw+B06fA6fPgdPnwOlzwHgOqOz0f6dn4PQMnJ6Bf6gZOD2Y0zNwegZOz8DpGTg9A+MzA/JCO

BiologyClass 11CBSE

What are the key anatomical features of Aphrodite marine worm?

Palp, notopodial bristles, stiff chaetae, iridescent bristles, neuropodial chaetae, anus.<img width="302px;" height="451px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAsAAAAQ6CAYAAABK9suqAAAQAElEQVR4AeydB5wkVdX2q3tmdjaxbGIlSUYUUVAMoJjAnLMYMGBYURQQXUUMLwoGJGcQVEBUVMCECQUERHIQkLjEZXPOu5O+8z/3nqpbsat7ZuF9P+FXzz3nPOc5596qru6+09M7NF/0khOGnsJT1+Cpe+Cpe+Cpe+Cpe+Cpe+Cpe+Cpe+Cpe+C/5R5oRu6/ITFPIYqeugZPXYOn7oH/mnvgqef7U6/7T90DT90DT90D/6X3QGQb4KjZbKx8Ck9dg6fugafugafugafugf9v7oGGPJYbEA3p/R

BiologyClass 11CBSE

Identify the labeled parts of Holothuria (sea cucumber) from a biological diagram.

Crown of tentacles – used for feeding.Introvert – retractable part of the body.Podia of ventral ambulacra – tube feet for locomotion.Inter-radiae – areas between the ambulacral regions.Anus – posterior opening for excretion.<img width="241px;" height="456px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAfgAAAO6CAYAAABzJ0UxAAAQAElEQVR4Aez9B4AURbc+Dlf3zOxsZgNLzjlJDoIgogJmFAOIiKiIiKiIYkBBxYyKiCIIKIgYQMFAVJQgiOScc1hgWVg2h9npmfnOU93V0z3TMzuLvvfe7/d/lzp1Tj3nOaeqw3R1dc8

BiologyClass 11CBSE

Read the diagram and provide a concise explanation

A marine polychaete worm showing differentiation between non-sexual and sexual body regions.Non-sexual region (Atoke): Ordinary parapodia used for movement.Sexual region (Epitoke): Modified swimming parapodia adapted for reproduction.Function: Locomotion and reproduction in marine environments.<img width="266px;" height="467px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAb4AAAM/CAYAAACu/re9AAAQAElEQVR4Aey9BXwcR9I+XFpJli3ZkiyZmZk9Zuag4zA7icOJk0sueIELJ5fkcg5znDh2HFPM

BiologyClass 11CBSE

How does the renin-angiotensin-aldosterone system (RAAS) regulate blood pressure and volume?

A fall in blood pressure in the afferent arteriole stimulates the juxtaglomerular apparatus (JGA) to release renin. Renin converts angiotensinogen into angiotensin I, which is converted to angiotensin II by ACE. Angiotensin II causes vasoconstriction and stimulates the adrenal cortex to secrete aldosterone. Aldosterone increases Na⁺ and water reabsorption in the distal convoluted tubule, raising blood volume and pressure. When blood pressure rises, the JGA is inhibited.<img width="790p

BiologyClass 11CBSE

How does ADH regulate blood osmolarity through feedback mechanisms?

When blood osmolarity rises above 300 mOsm/L, osmoreceptors in the hypothalamus stimulate thirst and trigger the pituitary gland to release ADH. ADH increases water reabsorption in the distal convoluted tubule, diluting blood and restoring osmolarity. When osmolarity falls below the set point, ADH secretion is inhibited, maintaining homeostasis.<img width="758px;" height="329px;" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA1EAAAFxCAYAAACStiK1AAAQAElEQVR4Aex9B5wUVfZ1dZqenGDIOQcD

STILL STUCK?

Get a tutor for just your question.

One-on-one help, verified tutors. Matched within 24 hours.

Get Started →