Biology Questions and Answers

Biology

Using a light microscope, one can view cell walls, vacuoles, cytoplasm, chloroplasts, nucleus and cell membrane. Light microscopes use lenses and light to magnify cell parts. However, they usually...

Latest answer posted July 3, 2012, 1:56 pm (UTC)

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Biology

An eight year old has between 206 and 300 bones, that is because when a baby is inside the womb it has 300 bones. However after the child is born some of the skull bones grow together which results...

Latest answer posted November 3, 2009, 8:19 am (UTC)

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Biology

Plant and animal cells both undergo mitotic cell divisions. Their main difference is how they form the daughter cells during cytokinesis. During that stage, animal cells form furrow or cleavage...

Latest answer posted February 7, 2013, 11:06 am (UTC)

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Biology

The nucleus is the most important organelle in the cell. It contains the genetic material, the DNA, which is responsible for controlling and directing all the activities of the cell. All the RNAs...

Latest answer posted October 4, 2013, 7:43 am (UTC)

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Biology

While the answer above reviews the process of digestion, the question can be viewed as what type of chemical reaction results in the break down of starch into smaller subunits known as glucose....

Latest answer posted November 22, 2013, 3:24 am (UTC)

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Biology

The inner surface of stomach is lined by Gastric epithelium and that of the small intestine is lined by Intestinal epithelium. Both the gastric epithelium and intestinal epithelium are simple...

Latest answer posted September 22, 2012, 8:27 am (UTC)

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Biology

The term cyclosis refers to the streaming of cytoplasm inside a living cell. This motion enables materials to reach all parts of a cell including: oxygen and nutrients. There is a protein called...

Latest answer posted July 10, 2012, 1:40 am (UTC)

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Biology

Methylene blue can be used in biology as a stain to indicate whether cells are dead or alive. The stain cannot penetrate live cells however, in dead cells, it can penetrate the cell membrane and...

Latest answer posted July 15, 2013, 12:50 pm (UTC)

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Biology

Actually, organelle replication, occurs during the G2 stage of the cell cycle. During this stage, organelles are replicated and proteins are synthesized. The G2 phase follows DNA replication which...

Latest answer posted August 8, 2012, 2:45 pm (UTC)

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Biology

A system of transport is found in most multicellular organisms. It allows the growth of these organisms to a substantial size in contrast with single-celled organisms. As the surface to volume...

Latest answer posted January 13, 2012, 11:38 pm (UTC)

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Biology

It appears that humans have something in the range of five million hairs. This total takes into account not only head hair but also all the hair on various other parts of the body. In fact, the...

Latest answer posted October 29, 2009, 9:29 am (UTC)

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Biology

Bacteria are one of the earliest living organisms that evolved on the Earth. This is before plants and animals. From a study of fossils scientists estimate the earliest bacteria to have evolved...

Latest answer posted September 4, 2011, 3:57 pm (UTC)

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Biology

Nucleic acids are a type of polymers (macromolecules). Nucleic acids may be the DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). The DNA stores genetic information while RNA translates this...

Latest answer posted September 19, 2013, 2:42 am (UTC)

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Biology

The emu is found in all of Australia except the rainforest. The inhabit in lands that are grassland or forest. The habitat of the emu is one with abiotic factors of restricted rainfall at a...

Latest answer posted April 28, 2010, 10:35 am (UTC)

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Biology

Natural Selection is a theory of evolution based on the premise that organisms which have genetic traits that make it easier for them to survive in an environment and more attractive to the...

Latest answer posted February 12, 2011, 9:02 pm (UTC)

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Biology

The structures of plants cells and animal cells though similar have a few differences. Three organelles that are present in plant cells but not present in animal cells are: The cell wall: Animals...

Latest answer posted September 4, 2011, 4:30 pm (UTC)

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Biology

Kingdom Protista includes eukaryotic organisms which don't easily fit into any other category. They vary by their method of locomotion and food-getting strategies. In terms of size, many members...

Latest answer posted January 13, 2012, 11:43 pm (UTC)

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Biology

Adaptation can be thought of as a set of special characteristics that may allow a living organism to successfully live in a particular environment. Adaptation allows an organism to adjust to the...

Latest answer posted April 7, 2018, 12:31 pm (UTC)

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Biology

There are two principal explanations for the differences in maxillary angle, teeth, and palate between chimpanzees and humans. The first is that although chimpanzees and humans can eat many similar...

Latest answer posted March 23, 2021, 2:09 pm (UTC)

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Biology

Tissues are groups of cells that work together to perform a particular function. There are four different types of human tissues: epithelial, connective, muscle, and nerve. They are each...

Latest answer posted January 5, 2013, 4:47 pm (UTC)

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Biology

Red blood cells are called erythrocytes and they are the most common type of blood cell in human blood. They give blood its red color. In terms of structure, they are oval shaped with dimples in...

Latest answer posted February 12, 2013, 1:02 am (UTC)

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Biology

The respiratory system is responsible for oxygen intake so that cells throughout the systems of the body can receive the oxygen they need for cellular respiration. The digestive system is essential...

Latest answer posted September 30, 2019, 10:37 pm (UTC)

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Biology

The correct answer is B. Cuboidal epithelial tissue gives rise to glands in the body. They line the surface of various ducts, glands and organs. This type of tissue is also known as glandular...

Latest answer posted September 26, 2012, 1:07 pm (UTC)

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Biology

The mitochondria are organelles within an animal cell that provide energy for the rest of the cell's functions through the creation of the energy molecule ATP by the chemical reactions occuring in...

Latest answer posted February 10, 2009, 6:51 pm (UTC)

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Biology

Sex limited inheritance refers to the inheritance of traits that are expressed only in either the male or the female offspring due to their expression being influenced by differences in the anatomy...

Latest answer posted March 1, 2011, 11:17 pm (UTC)

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Biology

First, they belong to completely different classes. Spiders are arachnids which include scorpions, ticks, and mites, among others; reptiles include animals who rely on the outside temperature to...

Latest answer posted July 5, 2008, 6:28 am (UTC)

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Biology

This is a basic fact of science that I remember always getting reminded of again and again when in school. In terms of levels of organization, it goes from biology to chemistry to physics to math...

Latest answer posted February 3, 2012, 8:10 am (UTC)

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Biology

Water will cross a cell membrane, and go from an area of less solute concentration to an area of more solutes, so that the concentrations are equal. This is why a blood cell will burst when placed...

Latest answer posted May 31, 2009, 1:55 am (UTC)

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Biology

In prokaryotes, binary fission is used for the purpose of asexual reproduction. Prokaryotes include bacteria and archaebacteria. The parent cell divides into two parts that will eventually grow to...

Latest answer posted July 10, 2012, 1:31 am (UTC)

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Biology

The skeletal system serves four main functions. Looking specifically at the human skeleton, those functions are: 1. protecting the other organs and systems of the body. Ribs, for example, guard the...

Latest answer posted October 16, 2012, 3:03 am (UTC)

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Biology

Cells are the basic unit of structure and form in all living things. Some organisms are made of only one cell (unicellular) while others are made of trillions (multicellular). Each cell must be...

Latest answer posted December 10, 2008, 2:45 am (UTC)

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Biology

Macromolecules include: carbohydrates, lipids, proteins and nucleic acids. Macromolecules consists of smaller molecules joined together chemically. Carbohydrates, which are sugars and starches,...

Latest answer posted January 15, 2013, 3:50 am (UTC)

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Biology

Mitosis results in identical cells that have the same number of chromosomes as the original cell. When the process starts, the genetic material is duplicated into two chromotids. When the cell...

Latest answer posted December 6, 2009, 10:16 am (UTC)

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Biology

Variegated leaves have areas that are white in color instead of being green. This is due to a lack of plastids that contain chlorophyll; without chlorophyll photosynthesis cannot take place. The...

Latest answer posted September 23, 2011, 2:39 pm (UTC)

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Biology

Milk like most other foods that we can consume allows the growth of micro-organisms that use the nutrients in milk and in many cases are harmful for our health. To extend the useful life of milk it...

Latest answer posted July 23, 2011, 2:56 am (UTC)

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Biology

The most general chemical equation for oxygen based photosynthesis is as follows: CO2 + H2O + photons --> CH2O + O2 This can be read as carbon dioxide plus water plus photons (energy from...

Latest answer posted September 21, 2012, 5:16 pm (UTC)

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Biology

The pulse in the arteries is directly related to the heart rate. The left ventricle in the heart pushes the blood to all parts of the body through the arteries. During periods of relaxation, most...

Latest answer posted February 6, 2012, 8:28 am (UTC)

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Biology

Different strains of Saccharomyces cerevisiae are used by bakers and brewers for fermentation to raise bread and produce alcohol. This species has a superior ability to perform fermentation making...

Latest answer posted September 23, 2011, 9:45 pm (UTC)

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Biology

The answer is C, the oxygen concentration is lower in the capillaries relative to the lungs. Likewise, at the alveoli, where this transaction occurs, the concentration of carbon dioxide is higher...

Latest answer posted December 15, 2009, 4:28 am (UTC)

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Biology

When a police officer gives someone a sobriety test they are testing the cerebellum which is responsible for our balance, coordination and muscle movement. The cerebellum is located in the...

Latest answer posted March 28, 2013, 3:51 am (UTC)

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Biology

If you were to use the metaphor of your body as a city, your blood and its vessels would be the transport system. You might see the arteries, veins, and capillaries as a road or rail network, while...

Latest answer posted February 17, 2022, 11:26 pm (UTC)

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Biology

Protein biosynthesis in cells occurs in two different stages. The first stage is called transcription. It occurs in the cell nucleus and it involves a sequence of DNA being converted into a...

Latest answer posted July 11, 2013, 1:51 am (UTC)

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Biology

The theory says that new cells are formed from other existing cells and the cell is a fundamental unit of structure, function and organization in all living organisms. Cells are the basic...

Latest answer posted January 12, 2009, 9:02 am (UTC)

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Biology

The epidermis is one single layer of tissue that covers the plant. It's main function is to protect it from the environment and absorb the water from the ground. The epidermal tissue itself...

Latest answer posted June 15, 2019, 9:00 am (UTC)

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Biology

Coelom can be called as the body cavity running throughout the length of the trunk in some organisms. Coelom originates by the splitting of the mesoderm (the second layer found in three-layered...

Latest answer posted February 22, 2013, 5:21 am (UTC)

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Biology

Based on the current biological characteristics of life, computer viruses are not living. Computer viruses do have different levels of internal organization. They grow, reproduce, and respond to...

Latest answer posted January 26, 2013, 1:46 am (UTC)

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Biology

The cell cycle of a somatic cell consists of interphase and mitosis/cytokinesis. During interphase, which occurs prior to mitosis, there are 3 phases: G1, S, and G2. During the G phases the cell...

Latest answer posted March 23, 2016, 12:30 am (UTC)

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Biology

1. Zeroes between other digits are always significant. Zeroes at the end of a number are only significant if they are behind a decimal point. 405000 has 3 significant digits (could be written...

Latest answer posted October 6, 2013, 11:31 pm (UTC)

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Biology

The DNA of an organism determines its physical characteristics and what it is capable of doing with the organs in its body. Yellow perch and walleye are two species of fish. They have a lot of...

Latest answer posted October 21, 2011, 10:13 pm (UTC)

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Biology

Bacteria are prokaryotes and their cellular structure is a very simple one. Within the outer cell wall is a watery interior called cytoplasm. Ribosomes in the cytoplasm make all the protein in the...

Latest answer posted October 13, 2011, 1:25 pm (UTC)

1 educator answer

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