Clues for: Biology

Question Answer Value Airdate
By definition bacteria called anaerobes don't need this to live oxygen 200 July 21, 2017
In an earthworm, pairs of nephridia, similar to these human organs, filter & remove waste kidneys 400 July 21, 2017
Linked to some birth defects, aneuploidy is the condition of having an abnormal number of these chromosomes 600 July 21, 2017
(Jimmy of the Clue Crew presents.) Blood has 4 main components: red blood cells that make up about 45% of the volume, white blood cells & platelets that account for less than 1%, and making up about 55% is this liquid part that transports cells throughout the body plasma 1000 July 21, 2017
There are 3 main types of these in the body--smooth, striated & cardiac muscles July 21, 2017
Neurospora crassa is this type of fungus; it grows on bread but in the wild is found on burned vegetation mold 200 November 23, 2007
Stomata, leaf pores that take in this gas, enlarge when its level in the air drops below normal carbon dioxide 400 November 23, 2007
About 25 species of this arachnid, most in the family buthidae, have venom that'll kill you; 1200 others sting like a bee scorpions 600 November 23, 2007
Linus Pauling found the structure of keratin, the main component of nails & this human body part hair 800 November 23, 2007
To help make sure your brain stays fueled, its cells need less of this hormone for glucose uptake insulin November 23, 2007
Juices naturally occuring in this organ include hydrochloric acid & pepsin, but no orange the stomach 200 December 7, 2004
"Skin" term for the layer of cells on the upper & lower surfaces of a leaf; it may be one cell thick the epidermis 400 December 7, 2004
It's the stage in a cocooned butterfly's metamorphosis between caterpillar & adult chrysalis (or pupa) 600 December 7, 2004
This reaction occurs in the chloroplasts, the oval-shaped green organelles in plants photosynthesis 800 December 7, 2004
Aye-aye, it's a lack of ascorbic acid that can cause this disease scurvy 1000 December 7, 2004
3 calves created this way made headlines back in 1988 cloning 200 April 13, 2004
The top 3 inches of an acre of soil may contain billions of nematodes, this type of creature worm 400 April 13, 2004
Classed as a subphylum of the chordates, they make up about 3 percent of animal species, including mammals vertebrates 600 April 13, 2004
A few hundred million years ago some plants had the bright idea to protect & spread their embryos in these seeds 800 April 13, 2004
In cell division, mitosis splits the nucleus & cytokinesis splits this liquid cushioning the nucleus cytoplasm 1000 April 13, 2004
Lacking a hard shell, copepods are less crunchy than other members of this group, like crabs crustaceans 800 December 19, 2001
Huntington's Disease is autosomal dominant, so one gene can cause it; CF is autosomal this, needing 2 recessive 1000 December 19, 2001
They're a plant's anchor & can have a fibrous or tap system roots 100 July 3, 2000
Around 1940 scientists found that mutations in these chromosomal units result in defective enzymes genes 200 July 3, 2000
3 kinds of these are sensory, motor & mixed nerves 300 July 3, 2000
This calcified tissue that surrounds the pulp cavity of a tooth is a bone-like substance dentin 400 July 3, 2000
This "ology" is concerned with the development of the fertilized egg & the growth of the fetus embryology 500 July 3, 2000
In a bird's egg, it's contained within the vitelline membrane Yolk 100 March 7, 2000
From the Greek for "green leaf", it's the green pigment in plants Chlorophyll 200 March 7, 2000
It's defined as a change in the hereditary material of an organism's cells Mutation 400 March 7, 2000
The Drosophilidae family of this insect is used extensively in genetics because of its short, 10-day life cycle Fruit fly 500 March 7, 2000
This French chemist presented his germ theory of fermentation in an 1857 paper, "On Lactic Fermentation" Louis Pasteur March 7, 2000
Measles, mumps & rabies are not transmitted by bacteria, but by these Viruses 100 March 17, 1999
Linnaeus only recognized 2 biological kingdoms; everything was either plant or this Animal 200 March 17, 1999
It's composed of the brain & spinal cord in vertebrates; scientists abbreviate it CNS Central Nervous System 300 March 17, 1999
Muscles may connect directly onto bones or connect to them by these Tendons 400 March 17, 1999
A termite's intestinal tract can break down this plant substance; yours can't Cellulose 500 March 17, 1999
It's any tissue that contracts & relaxes, causing movement of the limbs & other body parts Muscle 100 October 10, 1997
In 1970 David Baltimore proved that this nucleic acid could transmit information to DNA RNA (Ribonucleic acid) 200 October 10, 1997
In plants & invertebrates, this outermost layer of protection is usually just one cell thick Epidermis 300 October 10, 1997
It's the process by which an organism or cell takes in oxygen & expels carbon dioxide Respiration 400 October 10, 1997
Architectural term for the minimal stimulus that starts a nerve impulse, like pain threshold 500 October 10, 1997
Insensitive to light, your blind spot is where this nerve joins the eye optic nerve 100 June 14, 1996
A hormone called glucagon raises the level of this in the blood sugar (glucose) 200 June 14, 1996
Of curly hair, color-blindness or albinism, the one that isn't a recessive trait curly hair 300 June 14, 1996
One book describes this protozoan as a "mass of living jelly" amoeba 400 June 14, 1996
This part of the small intestine is named for the fact that it's about as long as the width of 12 fingers duodenum June 14, 1996
A heterodont animal has different types of these-- incisors & molars, for example teeth 100 April 3, 1996
Found within plant cells, a chloroplast contains this green pigment chlorophyll 200 April 3, 1996
In humans 3 to 5 of these bony segments make up the coccyx vertebrae 300 April 3, 1996
Individuals with the B type of this blood clotting disorder lack plasma thromboplastin hemophilia 400 April 3, 1996
The paramecium is covered with threadlike projections called these cilia 500 April 3, 1996
Lipids are soluble in fat solvents & insoluble in this common liquid water 100 September 5, 1995
In some flies this secretion contains a digestive enzyme; in bloodsuckers, an anticoagulant saliva 200 September 5, 1995
The pollen producer in a flower, it features an anther at its apex a stamen 300 September 5, 1995
Among the muscles, it's the antagonist of the biceps the triceps (quadriceps) 400 September 5, 1995
Vital for blood clotting, there are about 250,000 of them per cubic millimeter of blood platelets 500 September 5, 1995
Crocodilians are the only reptiles in which this organ has 4 separated chambers the heart 100 December 28, 1994
The armadillo possesses the endo- & exo- types of this support structure skeleton 200 December 28, 1994
E. coli, one of these found in humans, is often used in genetic studies a bacteria 300 December 28, 1994
A bird's crop is an expanded area of this part of the alimentary canal between the pharynx & stomach the esophagus 400 December 28, 1994
In 1910 Paul Ehrlich announced that Salvarsan was an effective treatment for this disease syphilis 500 December 28, 1994
On birds there are contour & down types of these feathers 100 April 20, 1994
Among humans it's the homogametic sex because it has 2 X chromosomes female 200 April 20, 1994
Term for your first set of teeth or for trees that lose their leaves each year deciduous 300 April 20, 1994
It's a thin sheet of tissue through which osmosis may occur a membrane 400 April 20, 1994
Common name of Cypselurus californicus whose enlarged pectoral fins act as airfoils flying fish 500 April 20, 1994
A scorpion's stinger is located in this part of its body the tail 100 October 5, 1993
They're the glands in females that produce milk mammary glands 200 October 5, 1993
In vertebrates the oculomotor nerve stimulates the muscles that move this organ the eyes 300 October 5, 1993
Many animals exhibit geotactic behavior; that is, they move in response to this force gravity 500 October 5, 1993
Like human hair, a bird's feathers are made of this protein keratin October 5, 1993
Term for the process of releasing an egg for fertilization ovulating 100 April 13, 1992
The three small bones found in this organ are known collectively as the ossicles the ear 200 April 13, 1992
In birds, this part of the alimentary canal is also known as the gastric mill the gizzard 300 April 13, 1992
In humans, they're the two main processes of cell division meiosis & mitosis 500 April 13, 1992
Some mollusks & other lower creatures are acephalous, meaning they lack this body part a head April 13, 1992
The seed-containing fruit of the dandelion is designed so it can be dispersed by this the wind 100 May 28, 1991
The 3 substances in cell walls that make up the woody tissue of trees are pentosan, lignin & this cellulose 200 May 28, 1991
Specialty that is concerned with bacteria, molds, yeasts & viruses among others microbiology 400 May 28, 1991
One theory holds they developed from overlapping fringed extentions on the ends of reptiles' scales feathers 500 May 28, 1991
Humans typically have a set of 46 in most of their cells chromosomes May 28, 1991
Rodents don't have these teeth, also called eyeteeth, but humans & dogs do canines 100 February 18, 1991
Thousands of ommatidia make 1 of the "compound" type of this sense organ an eye 200 February 18, 1991
These threadlike structures in the nuclei of cells carry the genes chromosomes (**chromatids) 300 February 18, 1991
The rumen is the first compartment of this organ in a cow the stomach 500 February 18, 1991
Geotropism is the directional growth movement of plants in response to this force gravity February 18, 1991
Some birds still have the gene that would allow these to grow in their beaks teeth 100 December 21, 1990
A millipede has this many antennae two 200 December 21, 1990
This 3-letter suffix denotes a carbohydrate, especially a sugar -ose 300 December 21, 1990
As opposed to vitamins B1 & C, which are water soluble, A & E are usually soluble only in this fat 400 December 21, 1990
In addition to making penicillin, species of penicillium are used to ripen & flavor these cheese December 21, 1990
Term for an organism that harbors a parasite host 100 January 10, 1990
Some birds have patella bones, commonly called this in humans kneecaps 200 January 10, 1990
Adjective used to describe your 1st set of teeth & plants that shed their leaves seasonally deciduous 300 January 10, 1990
Oxygenated hemoglobin is this color red 400 January 10, 1990
For an adult elephant it can be up to 1 1/2" thick & weigh about a ton yet can be pierced by an insect the skin 100 October 27, 1989
Dizygotic twins are more commonly known by this brotherly name fraternal twins 200 October 27, 1989
The fruit of the dandelion is designed to be dispersed by the wind & the fruit of the coconut by this the sea (or ocean current) 300 October 27, 1989
Euglenas are microscopic organisms scientists classify in both of these groups animals & plants 400 October 27, 1989
They're your smallest blood transport tubes & in some the red cells have to go through single file capillaries 500 October 27, 1989
The action of these organisms on sugar produces alcohol & CO2, as brewers well know yeasts 100 October 18, 1988
Your masseter muscle closes these mouth (jaw) 200 October 18, 1988
It connects the placenta & embryo in humans, usually for 9 months umbilical cord 300 October 18, 1988
A clam shell has 3 layers: the horny outer layer, the prismatic layer & one described as this pearly, mother of pearl or nacre 400 October 18, 1988
While "carpal" refers to bones in your body, a carpel is a reproductive organ in one of these flower 500 October 18, 1988
It's generally the last vestige of the tadpole stage that a frog loses tail 100 June 3, 1988
Fleischmann's says one ounce of this carbon dioxide-making substance contains about 280 billion cells yeast 200 June 3, 1988
Most animals other than birds or mammals are poikilothermic, commonly referred to as this cold-blooded 300 June 3, 1988
As the middle Paleozoic era is called the age of fishes, the Mesozoic era is known as this age of reptiles 400 June 3, 1988
Term for the transference of microspores of seed plants from anther to stigma pollination 500 June 3, 1988
One difference between moths & butterflies is that moths hold these horizontally while at rest their wings 100 February 10, 1988
Fecundity is the biological capacity of an organism to produce these offspring 200 February 10, 1988
The fin used as the chief means of locomotion for a fish tail fin 300 February 10, 1988
Term used when a mass of bees leaves a hive with a queen to form a new colony swarm 400 February 10, 1988
(The) Enzyme production of a cell is controlled by these parts of a chromosome genes 500 February 10, 1988
Mycology is the branch of biology that studies mushrooms, yeasts, molds, and other types of these fungi 100 November 16, 1987
Fibrinogen is a protein material that helps the blood in doing this clotting 200 November 16, 1987
Common term for a female gamete egg 300 November 16, 1987
People usually refer to adipose tissue as this fat 400 November 16, 1987
In any vertebrate, the occiput is the posterior part of this the skull 500 November 16, 1987
Animals in the class "Aves" are commonly called this birds 100 December 16, 1986
Mutagens are agents that can cause this mutations 200 December 16, 1986
In a turtle, this is supported by the fusion of the backbone & ribs the shell 300 December 16, 1986
Of a watermelon, jellyfish, or infant human, the one whose weight has the highest percentage of water a jellyfish 400 December 16, 1986
= = 100 November 25, 1985
= = 200 November 25, 1985
= = 300 November 25, 1985
= = 400 November 25, 1985
= = 500 November 25, 1985
In genetics, it's what passing of characteristics from Mom & Dad to Junior is called heredity 100 November 21, 1985
When sexually aroused, the carpenter species of this insect will chase jet liners bees 200 November 21, 1985
The period of time between egg laying & hatching is called this incubation 300 November 21, 1985
In an apple, it's the "inside" name for the pericarp the core 400 November 21, 1985
Found even in dinosaurs, this world's oldest known disease is still considered incurable arthritis 500 November 21, 1985