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All Subjects 42612 ACC311

F:210

210 ACC31Q

42612 result(s)

BT201 Final Term AI Solved

Q210

Which process can create new alleles in a population?

A) Photosynthesis
B) Digestion
C) Mutation
D) Breathing

AI Explanation

Mutations are changes in DNA sequences that can introduce new alleles into a population. These new genetic variations provide material for evolution.

BT201 Final Term AI Solved

Q211

Where are fossils mostly preserved?

A) Sedimentary rocks
B) Igneous rocks
C) Metamorphic rocks
D) Volcanic layers

AI Explanation

Fossils are most commonly preserved in sedimentary rocks because they form from layers of sediments that can bury and protect remains. Igneous and metamorphic processes usually destroy fossil evidence.

BT201 Final Term AI Solved

Q212

What does the Modern Synthetic Theory of Evolution primarily explain?

A) Evolution only by environmental influence
B) Evolution through use and disuse
C) Evolution through genetic variations and natural selection
D) Evolution of planets

AI Explanation

The Modern Synthetic Theory combines genetics with Darwin's theory of natural selection. It explains evolution as changes in populations caused by genetic variation and evolutionary mechanisms.

BT201 Final Term AI Solved

Q213

The bottleneck effect occurs when:

A) A mutation arises in a single allele
B) A species migrates to a new habitat
C) A large population is genetically modified
D) Population size is drastically reduced for at least one generation

AI Explanation

The bottleneck effect occurs when a population experiences a sudden reduction in size due to events such as disasters or disease. The remaining population may have reduced genetic diversity by chance.

BT201 Final Term AI Solved

Q214

Which molecule is referred to as a universal code among organisms?

A) ATP
B) Enzyme
C) RNA
D) DNA

AI Explanation

DNA is considered a universal genetic code because nearly all organisms use the same basic system for storing and transmitting genetic information. This similarity supports the idea of common ancestry among living organisms.

BT201 Final Term AI Solved

Q215

What are fossils?

A) Remains or imprints of dead organisms
B) Living organisms in deep oceans
C) Crystals formed in rocks
D) Artificial models of ancient animals

AI Explanation

Fossils are preserved remains, impressions, or traces of organisms that lived in the past. They provide physical evidence of ancient life forms.

BT201 Final Term AI Solved

Q216

What do fossils primarily provide evidence for?

A) Biodiversity in current ecosystems
B) Evolutionary changes over time
C) Photosynthesis in plants
D) Earth's atmospheric composition

AI Explanation

Fossils provide evidence of how organisms have changed throughout Earth's history. They help scientists understand patterns of evolution and extinction.

BT201 Final Term AI Solved

Q217

What does the green dot represent in the frog population example?

A) Frogs with green skin color
B) Frogs with multiple alleles
C) Frogs with dominant traits
D) Frogs that are extinct

AI Explanation

In population examples, a green dot typically represents individuals showing the green skin color trait. This helps illustrate variation of traits within a population.

BT201 Final Term AI Solved

Q218

In a population, what is indicated when the Hardy-Weinberg equilibrium is not maintained?

A) The population is stable
B) There is no gene flow
C) Evolution is occurring
D) The population is shrinking

AI Explanation

When Hardy-Weinberg equilibrium is not maintained, allele frequencies are changing due to evolutionary forces such as selection, mutation, migration, or genetic drift. This indicates that evolution is taking place.

BT201 Final Term AI Solved

Q219

What is the main difference between microevolution and macroevolution?

A) Size of organism
B) Environment
C) Time scale over which it occurs
D) Location of evolution

AI Explanation

Microevolution involves small genetic changes within populations over shorter periods, while macroevolution involves larger changes over long periods leading to new species or groups. The main distinction is the scale of evolutionary change.

BT201 Final Term AI Solved

Q220

What is a fossil?

A) A rock formation
B) A recently discovered species
C) A living organism adapted to extreme conditions
D) A preserved remain or trace of a past organism

AI Explanation

A fossil is the preserved remains, impressions, or traces of organisms that lived in the past. Fossils provide evidence about ancient life and evolutionary history.

BT201 Final Term AI Solved

Q221

The half-life of Potassium-40 used in dating ancient rocks is:

A) 1.3 billion years
B) 3.5 billion years
C) 5,730 years
D) 704 million years

AI Explanation

Potassium-40 has a half-life of about 1.3 billion years and is commonly used to date very old rocks. Its slow radioactive decay makes it useful for geological timescales.

BT201 Final Term AI Solved

Q222

A chromosomal change that deletes or rearranges many loci is usually:

A) Harmful
B) Necessary
C) Beneficial
D) Harmless

AI Explanation

Large chromosomal changes that delete or rearrange many loci often disrupt important genes and cellular functions. Therefore, they are usually harmful to the organism.

BT201 Final Term AI Solved

Q223

What is meant by “introduced species”?

A) A native species evolving into another
B) A species created by artificial selection
C) A species that goes extinct
D) A species brought into a new ecosystem

AI Explanation

An introduced species is a non-native species moved by humans or other means into an area where it did not previously exist. Some introduced species can become invasive and affect native ecosystems.

BT201 Final Term AI Solved

Q224

Stromatolites are formed due to:

A) Volcanic eruptions
B) Breakdown of trilobites
C) Calcified microbial deposits
D) Sedimentation of sand

AI Explanation

Stromatolites are layered structures formed by ancient microbial communities, especially cyanobacteria, that trap and bind sediments. They are among the earliest evidence of life on Earth.

BT201 Final Term AI Solved

Q225

What was the Cambrian explosion?

A) A meteorite impact
B) A mass extinction event
C) A massive volcanic eruption
D) Rapid appearance of many new animal body plans

AI Explanation

The Cambrian explosion refers to a period about 541 million years ago when many major animal groups appeared rapidly in the fossil record. It represents a major diversification of life forms rather than an extinction or geological disaster.

BT201 Final Term AI Solved

Q226

Who proposed that Earth's early atmosphere was a reducing environment?

A) Wegener and Haldane
B) Alfred Wegener and Charles Darwin
C) Oparin and Haldane
D) Stanley Miller and Louis Pasteur

AI Explanation

Alexander Oparin and J. B. S. Haldane proposed that the early Earth's atmosphere was a reducing environment with little or no free oxygen. Their ideas supported hypotheses about the chemical origin of life.

BT201 Final Term AI Solved

Q227

Why can’t natural selection produce perfect organisms?

A) It works on ideal genetic codes
B) It only selects from existing variation
C) It always creates new genes
D) It removes all harmful mutations

AI Explanation

Natural selection acts on variations that already exist within a population. It cannot create perfect organisms because evolution is limited by available genetic changes and environmental conditions.

BT201 Final Term AI Solved

Q228

Which of the following is a possible consequence of DNA segment inversion?

A) Chromosome duplication
B) New chromosome formation
C) RNA degradation
D) Change in protein structure

AI Explanation

DNA segment inversions can alter the order of genes and regulatory regions, potentially affecting gene expression and protein structure. They do not necessarily duplicate chromosomes or form new chromosomes.

BT201 Final Term AI Solved

Q229

Which of the following is a condition for a population to be in Hardy-Weinberg equilibrium?

A) Natural selection
B) No genetic drift
C) High migration
D) Constant mutation

AI Explanation

Hardy-Weinberg equilibrium requires no evolutionary forces such as genetic drift, natural selection, mutation, or gene flow. Under these conditions, allele frequencies remain constant across generations.