What is the primary source of energy for life on Earth?
Click to see answer
The sun.
Click to see question
What is the primary source of energy for life on Earth?
The sun.
How do members of the Kingdom Fungi obtain nutrients?
They absorb nutrients from outside their bodies.
What is crucial for the smooth operation of living organisms?
Interactions between organs, tissues, cells, and molecules.
What is the universal genetic language across all organisms?
DNA.
What distinguishes eukaryotic cells from prokaryotic cells?
Eukaryotic cells have membrane-enclosed organelles, including a nucleus, while prokaryotic cells do not.
What characterizes the Kingdom Plantae?
Multicellular eukaryotes that carry out photosynthesis.
What are protists primarily characterized as?
Mostly unicellular eukaryotes and some simple multicellular relatives.
What does evolution imply about organisms living today?
They are modified descendants of common ancestors.
What is feedback regulation?
The output or product of a process regulates the process.
What is the smallest basic unit of life?
The cell.
How do biological systems compare to non-living systems in terms of complexity?
Biological systems are far more complex.
What are the two types of feedback regulation?
Negative feedback (more common) and positive feedback.
What environments do some prokaryotes in Domain Archaea inhabit?
Extreme environments, such as salty lakes and boiling hot springs.
How does DNA influence organisms?
DNA controls the development and maintenance of organisms.
What is one question that biology seeks to answer regarding development?
How does a single cell develop into an organism?
What has been evolving on Earth for billions of years?
Life, resulting in a vast diversity of past and present organisms.
What is the significance of the statement 'Nothing in biology makes sense except in the light of evolution'?
It emphasizes the foundational role of evolution in understanding biology.
What are the three domains of life?
Bacteria, Archaea, and Eukarya.
How does the natural environment influence traits according to Darwin?
The natural environment consistently 'selects' for the propagation of certain traits.
What happens to some energy in an ecosystem?
Some of it is lost to the surroundings as heat.
What results from the arrangement and interaction of parts in biological systems?
Emergent properties.
What does natural selection cause in species over time?
Descent with modification as species adapt to different environments.
What is proteomics?
The study of whole sets of proteins encoded by the genome, known as proteomes.
How does energy flow through an ecosystem?
It usually enters as light and exits as heat.
What do ecosystems involve in terms of interactions?
An organism's interactions with other organisms and the physical environment.
What term did Darwin coin for the mechanism of evolutionary adaptation?
Natural Selection.
What does genomics study?
Sets of genes within and between species.
What mechanism allows cells to coordinate various chemical pathways?
Feedback.
How many species of organisms have biologists identified and named?
About 1.8 million species.
What is the significance of inherited traits in natural selection?
Individuals with inherited traits better suited to the environment are more likely to survive and reproduce.
What is a gene?
A unit of inheritance that encodes information for building molecules within the cell.
What provides evidence for the evolution of life on Earth?
Fossils and other evidence documenting changes over billions of years.
What are the three key observations made by Charles Darwin regarding populations?
What is Systems Biology?
The exploration of a biological system by analyzing the interactions among its parts.
How are evolutionary relationships often illustrated?
With treelike diagrams that show ancestors and their descendants.
What is a defining feature of the Kingdom Animalia?
Multicellular eukaryotes that ingest other organisms.
What is taxonomy?
The study of classification of organisms.
What regulates the passage of materials in and out of a cell?
The cell membrane.
What is a genome?
A 'library' of genetic instructions, typically containing two sets of chromosomes in a human cell.
What characterizes Domain Bacteria?
They are the most diverse and widespread prokaryotes, classified into multiple kingdoms.
What did Darwin propose about ancestral species and descendant species?
Natural selection could cause an ancestral species to give rise to two or more descendant species.
What do living things do in communities?
Interact with each other.
What similarity is observed among many animals?
Similar skeletal structures.
What is DNA?
Deoxyribonucleic acid, which contains genetic material within chromosomes.
What is the title of Charles Darwin's influential work?
On the Origin of Species by Means of Natural Selection.
What example did Darwin use to illustrate his theory of natural selection?
The finch species of the Galápagos Islands, which are descended from a common ancestor.
What is a key question about human cognition in biology?
How does the human mind work?
What are the levels of biological organization from largest to smallest?
Biosphere, Ecosystems, Communities, Populations, Organisms, Organs and Organ Systems, Tissues, Cells, Organelles, Molecules.
What is biology?
The scientific study of life.
