Biology Questions and Answers

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

Biology

Mesosomes, as located via the electron micrographs, are additional, folded protuberances or membranous elaborations (could be in the form of vesicles, tubules, lamellae) that occur irregularly at...

Latest answer posted October 13, 2012 5:39 pm UTC

1 educator answer

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

2 educator answers

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

1 educator answer

Biology

Carl Linnaeus was a Swedish botanist best known for his work on classifying and naming different biological organisms. He lived from 1707 to 1778 and did his most famous work during the middle...

Latest answer posted June 18, 2013 1:42 am UTC

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

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

1 educator answer

Biology

It isn't possible to say which of the two types of mutations would be more harmful to an organism as both forms affect the functioning of proteins in organisms in adverse ways and result in serious...

Latest answer posted April 20, 2011 9:18 pm UTC

1 educator answer

Biology

A homeotherm is an organism which is able to survive only when the internal body temperature is within a narrow range. If their body temperature increases to higher levels or falls to lower levels...

Latest answer posted March 23, 2011 12:12 am UTC

1 educator answer

Biology

A nerve is a connected bundle of peripheral axons. Nerves transmit electrochemical signals between points in the body. An external stimulus (sound, touch, taste, smell, sight) triggers the sensory...

Latest answer posted September 20, 2011 5:08 am UTC

1 educator answer

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

1 educator answer

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

1 educator answer

Biology

Both Meiosis 1 and 2 have the same phases: Prophase, Metaphase, Anaphase and Telophase. One difference is that Meiosis 1 starts with a diploid cell and Meiosis 2 starts with 2 haploid cells, each...

Latest answer posted February 4, 2010 9:39 am UTC

1 educator answer

Biology

Arteries carry oxygenated blood away from the heart to all parts of the body. The left ventricle pumps oxygenated blood out of the heart into the aorta, the largest artery, which is responsible for...

Latest answer posted January 2, 2012 11:33 am UTC

1 educator answer

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

1 educator answer

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

1 educator answer

Biology

In areas where soil is poor with few nutrients, carnivorous plants have the ability to trap insects, digest them and absorb the nutrients contained within the prey.These plants still carry out...

Latest answer posted January 13, 2012 12:34 pm UTC

1 educator answer

Biology

Ribosomes are tiny protein factories within a cell. Ribosomes are most abundant in protein producing cells, such as those in the brain and pancreas. Some of the proteins are for use within the...

Latest answer posted August 11, 2009 7:52 am UTC

1 educator answer

Biology

Marian is a carrier for the colorblindness allele. A female gets one X from her mother and one from her father. Since her father is colorblind, his X chromosome has to contain the colorblind...

Latest answer posted November 29, 2012 1:34 pm UTC

1 educator answer

Biology

The somatic nervous system is part of the peripheral nervous system (PNS). Somatic reflexes involve a skeletal muscle contracting in response to a stimuli. These reflexes are controlled by the...

Latest answer posted August 26, 2012 10:13 pm UTC

1 educator answer

Biology

Lactic acid fermentation is useful in anaerobic bacteria because they can convert glucose to two ATP molecules, which is the "energy currency"cells use to carry out their life processes. The waste...

Latest answer posted July 19, 2012 1:13 pm UTC

2 educator answers

Biology

AVES is really a fancy word for BIRD. The answer to this question depends a bit on what you mean by the word "unique." If by unique you mean "unusual when put together as a whole," we could add...

Latest answer posted June 24, 2013 2:35 pm UTC

1 educator answer

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

1 educator answer

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

2 educator answers

Biology

The literal meaning of Transcription is to put thoughts, speech, or data into printed form. The word itself is from the Latin trans 'across' and scribere 'to write.' In biology, it refers to the...

Latest answer posted January 10, 2012 6:10 am UTC

1 educator answer

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

1 educator answer

Biology

Myiasis is the term for when a parasitic fly larvae feeds on a hosts living tissue. "Myia" in Greek means fly. Infestation by fly larvae is more common in livestock and other animals. However, it...

Latest answer posted February 1, 2012 9:14 am UTC

1 educator answer

Biology

As a medical doctor and scientist, I have been aware of many animal experiments. Indeed, I have participated myself (under licence) in many experimental protocols. But i am starting to change my...

Latest answer posted October 24, 2009 4:39 am UTC

3 educator answers

Biology

According to my dictionary a biome is a "large geographical area of distinctive plant and animal groups, which are adapted to that particular environment." Desert: These desert biomes receive...

Latest answer posted July 6, 2009 4:46 am UTC

1 educator answer

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

1 educator answer

Biology

Protoplasm is a complex material comprised of two categories of substances. It is because of the complexity of physical properties and chemical properties that the ultimate chemical nature of...

Latest answer posted April 28, 2010 7:53 am UTC

1 educator answer

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

1 educator answer

Biology

Cells need a selectively permeable barrier sometimes called a semi-permeable membrane because some items need to be allowed to come in while others need to be let out of the cell. Cells could not...

Latest answer posted September 29, 2009 1:09 am UTC

2 educator answers

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

1 educator answer

Biology

The alleles for A and B are codominant and the allele for O is recessive. In order to produce an individual who is type O, each parent must contribute an O allele. The only parents who could...

Latest answer posted November 22, 2012 1:13 am UTC

1 educator answer

Biology

When a structure is homologous, it refers to body parts that might not necessarily have the same function, however, the structure is very similar leading to the conclusion that these organism's...

Latest answer posted April 21, 2012 11:55 am UTC

1 educator answer

Biology

An iodine test is used to detect starch, which is a polysaccharide. This is created by plants from the monosaccharide that they produce during photosynthesis as a means to store it in their bodies....

Latest answer posted September 23, 2011 2:03 pm UTC

1 educator answer

Biology

These are the three basic types of cell precursors in fetal development. As the zygote develops, initially all cells are the same. But as development progresses, cells become specialized, and the...

Latest answer posted July 6, 2009 10:40 am UTC

1 educator answer

Biology

Mitochondria and chloroplast organelles have their own DNA because they have unique operational functions. Both organelles control their reproduction within the cell. Further, both organelles...

Latest answer posted April 28, 2010 7:17 am UTC

1 educator answer

Biology

Blood is made up of the following four components: 1. Red blood cells. These make up 40-50% of blood by volume. Their function is to carry oxygen from the lungs to all parts of the body. 2....

Latest answer posted October 20, 2009 10:27 pm UTC

2 educator answers

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

1 educator answer

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