LESSON 1: THE EVOLVING CONCEPT OF LIFE BASED ON EMERGING PIECES OF EVIDENCE Flashcards
studies life in all its forms, past and present. This can include plants, animals, viruses and bacteria, single-celled organisms, and even cells. Life sciences study the biology of how these organisms live, which is why you may hear this group of specialties referred to as biology.
LIFE SCIENCE
studies life in all its forms, past and present. This can include plants, animals, viruses and bacteria, single-celled organisms, and even cells. Life sciences study the biology of how these organisms live, which is why you may hear this group of specialties referred to as biology.
LIFE SCIENCE
studies life in all its forms, past and present. This can include plants, animals, viruses and bacteria, single-celled organisms, and even cells. Life sciences study the biology of how these organisms live, which is why you may hear this group of specialties referred to as biology.
LIFE SCIENCE
CHARACTERISTICS OF LIFE (CRGREH)
• They are made up of cell
• They are capable of reproduction
• They grow and develop
• They respond to their environment
• They exhibit metabolism
• They maintain homeostasis
TYPES OF ORGANISMS
EUKARYOTE AND PROKARYOTE
ANY CELL ORGANISM THAT POSSESES A CLEARLY DEFINED
NUCLEUS
• CONTAIN ORGANELLES
• ANIMALS, PLANTS, FUNGI AND PROTISTS
• EITHER CAN BE UNICELLULAR OR MULTICELLULAR
EUKARYOTE
• ANY ORGANISM THAT
LOCKS A DISTINCT NUCLEUS
AND OTHER ORGANELLES DUE TO THE ABSENCE OF INTERNAL MEMBRANE
• BACTERIA AND ARCHEA
• UNICELLULAR
PROKARYOTE
WHEN AND WHERE LIFE FIRST BEGAN ON EARTH?
Zircon crystals, stromatolites, Homo Erectus,
“Upright Human”
• First discover discovered fire and start to cook
Homo Erectus
discovered several types of physical evidence that confirmed the earth’s age during the 1800s.
• Geologists,
Paleontologist and
Naturalists
EVIDENCES (FRVe)
-Fossils of ancient sea life on a dry land far from oceans.
-layers of rock
-Indications that volcanic eruptions, Eartquakes and erosion.
Fossils of ancient sea life on a dry land far from oceans.
Trilobites and fish fossil
VIOLENT
• CHAOTIC
• ANINHABITABLE
Earth’s Age - 4.6 Billion years old
LIFE ON EARTH, PROBABLY BEGAN ONLY BETWEEN
3.5 TO 4.0 BILLION YEARS AGO
The first form of life is believed to have appeard 3.5 billion years ago. the first evidence of life is found in microfossils.
Microfossils are fossils that contains the remains of tiny plants and animals. (they are very small)
Some of remain organisms do not have nuclues so they were called
/ PROKARYOTES
• UNICELLULAR ORGANISM - MULTICELLULAR ORGANISM
EARLY FORMS OF LIFE
are fossils that contains the remains of tiny plants and animals. (they are very small)
Microfossils
they started to make their own food by utilizing the energy from the sun and the carbon dioxed in the atmosphere.
The process of photosynthesis produced more oxygen that changed the Earth’s early atmosphere.
These are PHOTOSYNTHETIC ORGANISMS.
the first photosynthetic organism to form.
CYANOBACTERIA
the first photosynthetic organism to form.
CYANOBACTERIA
Oxygen was scarce on the early earth
• Ancestral cell must also have been
Anaerobic
Oxygen was scarce on the early earth
• Ancestral cell must also have been
Anaerobic
the oldest cell microfossils are fillaments from 3.5 billion years - old rocks in Western Australia. the filaments resemble chains of modern photosynthetic bacteria and the rocks in which they occur are the remains of ancient
Stromatolites
THE FIRST EUKARYOTES
WERE
Protists
The evolution of life is brought about the changes in the environment which are linked to changes in climate and geology. These Earth’s environmental changes made the Earth’s environment more suitable for a wider variety of life forms.
Newly Discovered tree species endemic to Dinagat Island
