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Scientists
This category is for questions about the people who apply the scientific method to solve problems, introduce new concepts, and strive to explain the natural world.
9,527 Questions
Why do many scientist think dinosaurs were warm blooded?
- Dinosaurs lived in Alaska and Antarctica. Although these places had no icecaps at the time, they still had cold winters, which a cold blooded animal could not have endured. We know they didn't simply migrate away, because young dinosaurs would not have been able to make such a migration until they were a few years old, and they would have had to survive the winters.
- Birds, which descended from dinosaurs, are warm blooded.
- Dinosaurs show signs of an active lifestyle, which is rare for animals that are cold blooded.
- The growth rate of juvenile dinosaurs more closely resembles that of warm blooded animals than cold blooded animals.
What is the name for a scientist who studies dinosaurs?
A person who studies reptiles and amphibians is known as "herpetologist." However, a "batrachologist" is someone who's study focuses solely on amphibians.
Herpetologists study reptiles and amphibians. It comes from the Greek term for a "creeping animal" and uses the ending -ology that is used to notate that it is the study of something.
What real evidence do scientists have that living things have changed over time?
The first living things that we know of were prokaryotes (single celled organisms without a cell nucleus), and they appeared about 3.8 billion years ago. About 3 billion years ago, the first prokaryotes evolved the ability to make food using sunlight, air, and water (photosynthesis). About 2 billion years ago, the first eukaryotes (organisms with a cell nucleus) evolved, and the first multicellular organisms evolved 1 billion years later. Approximately 500 million years ago, the Cambrian explosion occurred, and within only 140 million years of that (360 million years ago), plants, amphibians, insects, and fish lived on Earth, along with most other major invertebrate groups. Amphibians evolved into reptiles about 300 million years ago (mya), and reptiles diversified into mammals (about 200 mya), dinosaurs (225+ mya), crocodillians, and a variety of other groups that are now extinct. Dinosaurs evolved into birds about 150 mya.
Meanwhile, the simple, seedless plants from 300 mya evolved into conifers , cycads (less than 300 mya) and ginkgos (199 mya), and then flowering plants appeared about 130 million years ago, one group of which was the Magnolids.
After the K-T extinction 65.5 mya that wiped out the non-avian dinosaurs, the tiny mammals quickly evolved into larger and more diverse forms, and finally into the mammals that are alive today.
What is Van Helmont's experiment?
Measurement and rationale for the growth of a willow tree is Van Helmont's experiment.
Specifically, Jan Baptist van Helmont (1580-1644) was a Brussels-born scientist. He was an astute observer of objects and processes. One of his famous experiments was centered on the five-year study of the growth of a willow tree (Salixspp). His conclusions of a 164-pound weight gain due to the intake of water through the roots and soil were prefatory to understandings of the conservation of mass even though he ignored the role of atmospheric carbon dioxide.
A meteor hit the earth and caused severe condition that organisms could not survive.
What is the scientist that studies plant and animal life?
Biologists study life; they can be considered to be of two kinds:
zoologists study animals, and botanists study plants.
How do scientists know that dinosaurs are carnivore?
It was a herbivore because it was formed with flat teeth not sharp teeth, which would be on a carnivore.Also,you wouldn't expect a HUGE animal like a Brontosaurus to run and catch another animal easily like a T-Rex would.
Why do scientists use animals for testing?
Some of the animals could die an awful painful death and that is pretty sad to see people experiment on innocent animals.
What happens to animals in medical experiments will depend totally on who is controlling the experiments. It's true that some could die a painful death, but one would have to do extensive, non-biased research to determine how the animals are treated during experimentation and if any die such deaths as described above. It's best not to take everything you read or hear about any animal issues as the total truth as some are totally biased against any type of experimentation on animals of any type.
No matter what animal scientists experiment on, they do it in a vile and brutal way. Sometimes, scientists cut out the top of an animal's skull and put an electrical chip in there. You would be surprised how many animals suffer this kind of treatment a year - millions.
The type of experiments really depends on what happens to the animal. In most cases, the experiments involve invasive procedures, one of which is called vivisection. Animal experimentation is not necessary as all though non-human animals have similar bodies to humans, they are not identical, and the desired results are seldom produced. There are alternatives to animal experimentation, such as voluntary human dosing, but because it is cheaper to continue to torture involuntary individuals who have no rights under the current law, animal experimentation continues.
There is no justification for cruelty.
Ornith is the root for bird. Someone who studies birds is called a ornithologist.
What problem caused biologists to believe amphibians evolved from certain fish?
The earliest forms of amphibians evolved from lobe-finned fish in the Devonian Period, around 350 million years ago. These fish had strong, bony fins that allowed them to drag themselves on land, and some of them developed lungs for breathing air. These two adaptations were very helpful in their freshwater environments that were often stagnant and dried out. Eventually the bony fins of these fish evolved into limbs that became better suited for terrestrial locomotion over time. Early amphibians still spent most of their lives in water and always had to lay their soft eggs in water.
One of the earliest and most well known ancestors of amphibians (and all tetrapods in general) is a lobe-finned fish called Eusthenopteron. Although it never actually went on land, it still had four fins with bone structures homologous to all modern tetrapods, and also had internal nostrils and enfolded enamel found on primitive labyrinthodont amphibians.
Another important transitional form is Tiktaalik, who is an important link in the transition between lobe-finned fish and tetrapods. By the structure of its jointed fins, which contain wrist bones, it was probably one of the first fish to crawl on land. However, it only did so under certain circumstances and still spent almost all of its time in water. It had both gills and primitive lungs, and had a flattened head shaped like that of an amphibian's.
The earliest amphibians include Acanthostega and Icthyostega. Their primitive limbs contained digits, but were still poorly adapted for moving efficiently on land. Yet it was a good start, and they would be succeeded by labyrinthodonts such as Tulerpeton and Eryops, who are the ancestors of true amphibians.
The first modern amphibians emerged in the Carboniferous Period and had all the adaptations necessary to make them suitable for living both in water and on land. Amphibians became the dominant terrestrial vertebrates through most of the Carboniferous until they are replaced by their descendants, the reptiles.
How do scientist classify animals by?
Taxonomists usually use a set of criteria that have to do with reproduction. So even if two species can reproduce an offspring, taxonomists usually make the distinction that the offspring must be able to reproduce as well. If this is the case, then they are likely to consider the two organisms as one species.
What are the scientists who study prehistoric times called?
two types of scientists who specialize in prehistoric times are 1) Paleontologists, they studied dinosaurs and such and 2) Paleobotonists, they study prehistoric plants.
What do you call a scientist who studies giraffes?
Giraffes are related to horses. They have very long necks to reach the leaves they eat. Their bodies are covered with large brown spots. Giraffes have long black tounges to help them gather leaves from the branches. They are usually found in the Sahara deserts. On their heads are two (or rarely more) little stumps used to attack predators. When giraffes get a drink of water, they have to spread their legs out long and bend their necks all they way down (at this time when they get drinks, they are open for attack for any predators because it takes a little while for giraffes to get back up properly.).
A giraffe is a mammal with a long neck, and is found on the Savanna of Africa. It eats the leaves of the acacia tree.
What do you call a scientist who studies whales?
Cetology is the branch of marine science associated with the study of cetaceans, which is the order that contains whales, dolphins, and porpoises. Logically, a scientist who studies whales is therefore a cetologist.
What are some ways scientists study animals?
A scientist might design a study that focuses on the behavior of a particular group of animals, changes to their ecosystem, genetics, or the evolution of the species. They would keep detailed records during the study and may publish results in a scientific journal.
What kind of scientist studies dinosaurs and ancient life?
A paleontologist studies dinosaurs and can also delve into the ancient life of humans and other animals too, although archaeologists also study old civillisations.
What criteria do scientists use to classify an organism as a mammal?
Mammals are vertebrates that are warm-blooded, breathe air, and females nurse their young with mammary glands.
What is the contribution of Dr Francisco M Fronda in the field of science?
Francisco Fronda has improved methods of production for the poultry and livestock industry. He is also the author of the book Poultry Science Production and was one of the first five people in the world to earn a doctorate in Poultry Science.
Can you give me an example of a food web?
an example of a food web would be:
Crabs, Shrimp, Manatees, Planton all eat vegetation
seagulls eat crabs
seal eats plankton
great white sharks eat manatees
small tooth sawfish, dolphin eat shrimp
hawks, great white sharks, orca eat seagulls
great white shark, orca eat seal
great white sharks eat small tooth sawfish
orca eat dolphin
Give 5 example of filipino scientists and their contributions?
Among ten famous Filipino scientists include Angel Alcala, Arturo Alcaraz, Benjamin Almeda, Julian Banzon, Ramon Barba, Benjamin Cabrera, Paulo Campos and Magdalena Cantoria. Also on the list are Josefino Comiso and Lourdes Cruz.
What was Nikola Tesla's favorite food?
His favorite foods consist of green vegetables and mashed potatoes. Mayonaise is not a favorite of Tesla.
PRODIGAL GENIUS
The Life of Nikola Tesla by John J. O'Neill (1944)
"With the passing decades, Tesla shifted away from a meat diet. He substituted fish, always boiled, and finally eliminated the meat entirely. He later almost entirely eliminated the fish and lived on a vegetarian diet. Milk was his main standby, and toward the end of his life it was the principal item of diet, served warm. As a youth he drank a great deal of coffee, and, while he gradually became aware that he suffered unfavorable influences from it, he found it a difficult habit to break. When he finally made the decision to drink no more of it, he adhered to his good intentions but was forced to recognize the fact that the desire for it remained. He combated this by ordering with each meal a pot of his favorite coffee, and having a cup of it poured so that he would get the aroma. It required ten years for the aroma of the coffee to transform itself into a nuisance so that he felt secure in no longer having it served. Tea and cocoa he also considered injurious. He was a heavy smoker in his youth, mostly of cigars. A sister who seemed fatally ill, when he was in his early twenties, said she would try to get better if he would give up smoking. He did so immediately. His sister recovered, and he never smoked again."
