Microfinance and poverty[ edit ] Financial needs and financial services. In developing economies and particularly in rural areas, many activities that would be classified in the developed world as financial are not monetized: This is often the case when people need the services money can provide but do not have dispensable funds required for those services, forcing them to revert to other means of acquiring them.
Notes Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.
That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny.
Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts.
Light microscopes use a system of lenses to magnify an image. The power of a light microscope is limited by the wavelength of visible light, which is about nm.
The most powerful light microscopes can resolve bacteria but not viruses. To see anything smaller than nm, you will need an electron microscope.
Electron microscopes shoot a high-voltage beam of electrons onto or through an object, which deflects and absorbs some of the electrons. Resolution is still limited by the wavelength of the electron beam, but this wavelength is much smaller than that of visible light.
The most powerful electron microscopes can resolve molecules and even individual atoms. Adenine The label on the nucleotide is not quite accurate.
Adenine refers to a portion of the molecule, the nitrogenous base. It would be more accurate to label the nucleotide deoxyadenosine monophosphate, as it includes the sugar deoxyribose and a phosphate group in addition to the nitrogenous base.
However, the more familiar "adenine" label makes it easier for people to recognize it as one of the building blocks of DNA. How can an X chromosome be nearly as big as the head of the sperm cell?
No, this isn't a mistake. First, there's less DNA in a sperm cell than there is in a non-reproductive cell such as a skin cell. Second, the DNA in a sperm cell is super-condensed and compacted into a highly dense form.
Third, the head of a sperm cell is almost all nucleus. Most of the cytoplasm has been squeezed out in order to make the sperm an efficient torpedo-like swimming machine.
The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis.
It has also been duplicated, so there are actually two identical copies stuck together at their middles. A human sperm cell contains just one copy each of 23 chromosomes.Minecraft 5 Point Scale – Self Regulation for Kids – free printable and customize.
Activities & Ideas,Kids Emotional & Behaviorial Tips,Lemon Lime Adventures, This is a multiple choice activity for teaching or revising feelings and emotions related vocabulary.
Students are asked to look at the picture and choose the correct option. Official site for California State University, Fresno.
Home of the Fresno State Bulldogs. It specifies performance attainment targets (P scales) and performance descriptors for pupils aged 5 to 16 with special educational needs (SEN) who are working below the standard of the national. benjaminpohle.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. Quia Web. Create your own educational games, quizzes, class Web pages, surveys, and much more!
Explore millions of activities and quizzes created by educators from around the world. Reading Lesson Plans & Activities The resources provided by The Teacher's Corner cover a variety of literacy-focused topics such as: comprehension, word lists, centers, reading skills, vocabulary, and more.