× Didn't find what you were looking for? Ask a question
  • Your 24/7 Study Community
    Let our members and experts help you today.
    Ask a question on your homework, textbook problem or any subject topic.
    Answer other members' questions for self-practice, posting credits, and goodwill.
  • Learn more...  What type of user are you?
    High School Student College Student Parent Educator Subject Enthusiast
  • Ace Your Classes
    with the help of Biology Forums' online study community...
    ...where you can find real help from students, educators, and subject enthusiasts.
    It's free!
    Join Today
Who Are We?
Biology Forums - Study Force is a global community comprised of students, educators, and enthusiasts helping each other understand how to solve problems in sciences, mathematics, business, nursing, humanities, and many more subjects.
Q and A Experts
Gallery
Study Resources
Dictionary
We provide access to various types of study material, including textbook solutions, topic notes, sample problems, illustrations, and practice exams that are created by us, indexed from the web, or contributed by our members.
Blogs
Video Tutorials
Flashcards
Textbook Solutions
Our tools, content, and community empower students to push the limits of their learning capabilities.
4.8M
Total Posts
1.9M
Total Topics
61.6K
Members Registered this Year
0
Guests Browsing
0
Members Online
0
Registrations Today
From Our Gallery
Enhance your visual learning  Download and share pictures with your free membership.
What better way to learn than with access to over 35,000 diagrams, photos, and illustrations.
 5761
Different Types of Cells
 351
Chlamydomonas Life Cycle
 203
Eucalyptus robusta
 276
Relaxed and supercoiled DNA molecules
 234
Control of Respiration
 313
The large, white flowers of giant saguaro cactus (Carnegiea gigantea) produce sweet nectar. The flow
 228
Insect Body Plan: Grasshopper
 250
Marsupials: Kangaroo
 395
Major muscles of the human musculoskeletal system
 275
Loss of a Shoot Tip Ends Dormancy in Lateral Buds
 340
Evolutionary Tree for Chordates
 304
Example of a coordinated interaction between skeletal muscle tissue and nervous tissue
 5564
The vertebrate endoskeleton.
 4009
A treatment for blocked blood vessels.
 66780
Parenteral medication administration. The angle of needle insertion for four different types of pare
 388
Xylem vessels
 260
Mammalian Teeth
 626
Anthrax bacteria (Bacillus anthracis)
 275
Portuguese man-of-war (Physalia), a colony of scyphozoans
 674
Enceladus
 341
Xylem vessels
 4616
Major structures of the human brain.
 324
Representatives of major orders of placental mammals
 444
Cohesion–tension theory of water transport in vascular plants
 4661
Reaction against infection
 347
Micrograph and graphic of a motor neuron
 259
Scorpion
 362
Hydrostatic Skeleton: Earthworm
 258
Epicatechin
 574332
Insect Spy Drone
 77
Nondisjunction
 344
Neuron and Astrocytes
 2710
The muscle-spindle feedback circuit
 181
Amoeba, a single-celled heterotroph
 3455
Cross section of the wrist showing tendons and nerves involved in carpal tunnel syndrome.
 16983
Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria
 523
Indricotherium
 12578
Development of an atherosclerotic plaque that progressively narrows the lumen of an artery to the po
 93
Checkpoint Genes in Action
 92
Benign and malignant neoplasms
 4520
Variation in shape and length of nerve cells.
 230
Ciliate Structure: Paramecium
 458
Trichomes are hairs or other fine outgrowths of epidermal cells
 227
Evolutionary conservation of chromosome synteny
 142
Sketch of Euglena gracilis
 120
Evolution of internal membranes
 190
Lichen Structure
 101
Miller's Experiment
 2826
Structure of a mitochondrion
 137
Sympatric Speciation in Wheat
Our Videos are Simple, Yet Effective
Skip the theory  The best way to learn is by watching tons of video examples.
Get right to answering questions with step-by-step explanations in HD quality!
Handling Partial Periods with Drop and Balloon Payments #finance #annuities
Future Value of Compound Interest Formula (How it Works and its Derivation)
Solving for the Number of Periods in an Annuity
Grade 6 Math Challenge: Average Speed 95% Get This Wrong!
Deriving the Geometric Series Sum Formula
Solving Promissory Note Problems - Calculating Discounting Time
Treasury Bill Calculations (T-bills)
Calculating Present Value of Annuity Due
Finance Trick to Paying off Your Mortgage Faster
Ordinary Simple Annuity Formula (How it Works and its Derivation)
Cavalieri's Indivisibles and the Area of a Circle
Calculating Real After Tax Interest Rate
Discount Loans Explained (when interest is paid upfront)
When in Rome (a tutorial on Roman numerals)
Synthetic Division when Denominator is 2x−3 [FIXED]
Online Flashcards
Study, learn, and test youself  Whether you want to memorize every bone in the body or prepare for the upcoming MCAT, our web-based flashcard maker has you covered.
If Peter decides to lend his friend Todd money so that in the future Todd will be more likely to return the favor, then Peter is relying on the social responsibility norm.
 
  Indicate whether this statement is true or false.
Quiz Me
If John, an advertising copywriter, intends to represent the core requirements of the target audience, then what does he essentially need to write?
 
  a) An appeal
  b) A subhead
  c) A body copy
Quiz Me
If an intelligence test yields a deviation IQ, about two-thirds of the population will get scores between _____ and _____. 
A) 0; 100 
B) 50; 150 
C) 85; 115 
D) 100; 125
Quiz Me
The population of Ourtown, Saskatchewan is expected to grow at a rate of 2.5% per year for the next five years. If the current population is 11,763 what is it expected to be in five years? Round to the nearest person.

▸ 13,233
Quiz Me
What musician played tenor saxophone on popular bossa nova tunes such as Girl From Ipanema and Desafinado?
 
  a. Stan Getz
  b. Dexter Gordon
  c. Lester Young
  d. Joe Henderson
Quiz Me
Modernization is associated with each of the following except:
 
  a. a Western-based culture-bound concept
 b. a major influence worldwide
 c. associated with technological development
  d. linked...
Quiz Me
Cool Off A survey of southern California houses in a given town shows that 70% of the homes have an air conditioning system and 90% of home have at least one ceiling fan. 65% of all homes surveyed had both...
Quiz Me
Based on the information in Clarissa's auto insurance application, her agent has assigned Clarissa to driver class 3 and placed her 5-year-old car in model class N. The state where she lives requires minimum liability coverage of 50/100/50, and she...
Quiz Me
Comparing Lucas vocal style in Poor Boy Blues to the leader in Amazing Grace,
 
  a. Lucas avoids syncopations and blue notes.
  b. both use call-and-response texture.
  c. the singer in Amazing Grace doesnt...
Quiz Me
A local mayoral candidate hired Xavier Xed to test whether the method of distributing campaign literature resulted in more people voting for a candidate. He distributed campaign literature about the mayoral candidate to the Stevenson neighbourhood in...
Quiz Me
Lance's doctor told him 15 years ago that if he did not change his lifestyle, the drinking, smoking, and drug abuse were going to kill him. Lance didn't heed the warning, claiming that if he died no one would miss him anyway, and now he has died....
Quiz Me
Consider a container of 2.0 g of hydrogen, H2 (one mole). Suppose you removed all the electrons and moved them to the other side of Earth (Earth's radius is 6380 km, k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2, NA = 6.022 × 1023 molecules/mol, e =...
Quiz Me
We're Social
Follow us on your favorite social media platform