Biology

A:

The largest blood vessel in the human body is the aorta. Rising up from the left ventricle of the heart, the aorta curves down and passes through the chest cavity and into the abdomen.

See Full Answer
Filed Under:
  • What is natural vegetation?

    Q: What is natural vegetation?

    A: Natural vegetation refers to the plants and other flora that make up the plant life in the region. The natural vegetation will determine the characteristics of the area.
    See Full Answer
    Filed Under:
  • What are some examples of saprophytic bacteria?

    Q: What are some examples of saprophytic bacteria?

    A: Examples of saprophytic bacteria include cheese mold, lactic acid, yeast and rotting kitchen waste. Saprophytic bacteria are fungal organisms that feed off of decaying organic matter. The term "saprophyte" refers specifically to fungal and bacterial saprotrophs, but animal saprotrophs are known as saprozoites.
    See Full Answer
    Filed Under:
  • What is the smallest animal on land?

    Q: What is the smallest animal on land?

    A: Leaving aside invertebrates, which are often microscopic, the smallest land vertebrate is Paedophryne amauensis. This tiny frog was discovered in the jungles of New Guinea, and adults are only 0.27 inch long.
    See Full Answer
    Filed Under:
  • What is the definition of living things?

    Q: What is the definition of living things?

    A: Living things are organisms that display the key characteristics of life. These characteristics include the ability to grow, reproduce, take in and use energy, excrete waste, respond to the environment, and possess an organized structure more complex than that of non-living things.
    See Full Answer
    Filed Under:
  • What are the general characteristics of bacteria?

    Q: What are the general characteristics of bacteria?

    A: Bacteria are typically single-celled organisms called prokaryotes that may serve as digestive aids, cause disease or aid in decomposition. Unlike eukaryotes, they do not have nuclei. Bacteria contain their DNA and other genetic material as a single strand in their cytoplasm, and they reproduce through a process called binary fission.
    See Full Answer
    Filed Under:
  • What is the difference between ectoplasm and endoplasm?

    Q: What is the difference between ectoplasm and endoplasm?

    A: Endoplasm and ectoplasm are names for the inner and outer portions of an amoeba’s cytoplasm. Ectoplasm is the clear outer cytoplasmic layer of an amoeba. Endoplasm, on the other hand, is the inner granule-rich cytoplasm of the amoeba.
    See Full Answer
    Filed Under:
  • What are carbohydrate chains?

    Q: What are carbohydrate chains?

    A: Carbohydrate chains are chains composed of two to potentially hundreds of carbohydrate compounds called monosaccharides. Once two of these monosaccharides combine, they form a disaccharide. If there are more than two but fewer than 10 monosaccharides in a chain, it is called an oligosaccharide, and a polysaccharide is a carbohydrate chain that consists of hundreds of monosaccharides.
    See Full Answer
    Filed Under:
  • How do animals adapt to the rainforest?

    Q: How do animals adapt to the rainforest?

    A: Many animals have adapted to the rainforest by adopting arboreal, or tree-dwelling, lifestyles. For example, chimpanzees have incredibly strong arms and hands, which help them to climb through the many branches and vines in the rainforest understory, according to The Guardian. In addition to their impressive strength, chimpanzees possess very long and flexible arms, which also help them to climb skillfully through the trees.
    See Full Answer
    Filed Under:
  • How do you grow chest hair faster?

    Q: How do you grow chest hair faster?

    A: There is no proven method that speeds up the growth of chest hair. The rate of hair growth in any individual is largely based on genetics.
    See Full Answer
    Filed Under:
  • What are the two main parts of the nervous system?

    Q: What are the two main parts of the nervous system?

    A: The two main parts of the nervous system are the central nervous system and the peripheral nervous system. The central nervous system consists of the spinal cord and the brain, which contains 100 billion nerve cells. The peripheral nervous system is broken down into the somatic and autonomic nervous systems.
    See Full Answer
    Filed Under:
  • What are the advantages of the amniotic egg?

    Q: What are the advantages of the amniotic egg?

    A: The amniotic egg allows reptiles, birds and mammals to lay eggs on land without drying out. The fluid-filled cavity containing the embryo is separated from the external environment by an amniotic sac that is impermeable to water. It is protected by an external hard shell.
    See Full Answer
    Filed Under:
  • What is meant by biological factors?

    Q: What is meant by biological factors?

    A: A biological factor is anything that affects the function and behavior of a living organism, according to Psychology Dictionary. These factors can be physical, physiological, chemical, neurological, or genetic. Biological factors are the primary determinant of human behavior and are routinely examined when studying the causes of mental illness.
    See Full Answer
    Filed Under:
  • What are some animals with names beginning with the letter "Q"?

    Q: What are some animals with names beginning with the letter "Q"?

    A: There are several animals that have names that begin with the letter "q," including the quail, the quarterhorse and the quoll. Lesser known animals, like the queen snake, the quokka and the quetzal also have names beginning with this not-so-often-used letter.
    See Full Answer
    Filed Under:
  • What is the purpose of the metatarsal bones?

    Q: What is the purpose of the metatarsal bones?

    A: Metatarsal bones bear most of the weight in the foot when humans walk. There are five metatarsal bones, numbered one through five. These structures provide the shape of the arch in the foot. The first metatarsal is shorter than the other four, and the remaining metatarsals are the same length.
    See Full Answer
    Filed Under:
  • What is the scientific name for amoeba?

    Q: What is the scientific name for amoeba?

    A: The scientific name for amoeba is Acanthamoeba polyphaga. An amoeba is a single-cell organism that is classified as a protist, which is a diverse group of microorganisms.
    See Full Answer
    Filed Under:
  • Why is pH important to living organisms?

    Q: Why is pH important to living organisms?

    A: Living organisms depend on a proper balance of hydrogen and hydroxide ions in order to maintain essential physiological processes. Scientists use pH to express the concentration of hydrogen ions in a solution. Many organisms have tightly regulated systems to maintain the pH within the required range.
    See Full Answer
    Filed Under:
  • What are disadvantages of asexual reproduction?

    Q: What are disadvantages of asexual reproduction?

    A: The primary disadvantage to asexual reproduction is the lack of genetic diversity among the resulting offspring. In contrast to sexual reproduction, which involves the recombination of two different sets of genes, an asexual organism possesses the same genes as its parent did. This can lead to problems if the parent has a genetic defect; without another parent to replace the gene, the offspring possesses the defect as well.
    See Full Answer
    Filed Under:
  • What part of the brain controls writing?

    Q: What part of the brain controls writing?

    A: Generally, the left hemisphere of the brain controls writing, the Mayfield Clinic explains. It also controls speech, comprehension and arithmetic. Moreover, it is dominant in language and hand use in around 92 percent of people.
    See Full Answer
    Filed Under:
  • What is character displacement?

    Q: What is character displacement?

    A: Character displacement occurs when certain characteristics react to evolutionary factors and stimuli. This displacement allows closely related species to coexist in societies without creating different species, breeds or overgrowing the population of a species.
    See Full Answer
    Filed Under:
  • Why is biology important in everyday life?

    Q: Why is biology important in everyday life?

    A: Biology is important to everyday life because it allows humans to better understand their bodies, their resources and potential threats in the environment. Biology is the study of all living things, so it helps people to understand every organism alive, from the smallest bacteria to California redwoods and blue whales. Professional biologists often concentrate on a small subset of living organisms, such as birds, plants or bacteria.
    See Full Answer
    Filed Under:
  • What is the ultimate source of energy for all life on Earth?

    Q: What is the ultimate source of energy for all life on Earth?

    A: The ultimate source of energy for all life on Earth is the sun. Every form of life on Earth is dependent upon others, and without sunlight, most life on Earth would cease to exist rather quickly.
    See Full Answer
    Filed Under: