Evolution
This term describes a change in the characteristics of a species over many generations
Evolution
Define phenotype
The physical characteristics of an organism, such as eye color or height, are referred to as this.
The preserved remains or traces of ancient organisms are called these.
fossils
This molecule carries genetic information in the form of a double helix.
DNA
What is an adaptation?
A characteristic that helps an organism survive and reproduce in its environment
What is speciation?
This process occurs when one species splits into two or more new species
If both parents are heterozygous for a recessive trait, the probability that their child will inherit the recessive trait is this percentage.
25%
The fossil record shows that organisms have become more ______ over time.
complex
The complementary DNA strand to GCTGCCAATGCCA is this.
CGACGGTTACGGT
These structures, like the human appendix, are remnants of organs that once had a function in an ancestor.
vestigial structures
Who is Charles Darwin
This scientist developed the theory of natural selection after studying finches on the Galapagos Islands.
Genes found on the X chromosome are referred to as this type of trait
X-linked traits
This dating method determines whether one fossil is older or younger than another without giving an exact age.
Relative dating
DNA is made up of these building blocks.
Nucleotides
Some moths evolved darker wing colors after the Industrial Revolution due to pollution. This is an example of what process?
Natural selection
What are homologous structures?
These structures have the same underlying structure due to common ancestry but may serve different functions, like a whale’s flipper and a human arm.
If a father has an X-linked condition, this is the probability that he will pass it on to his son
0%
This method of dating uses radioactive isotopes to find the actual age of a rock or fossil
Absolute dating
These are the three main parts of a nucleotide.
phosphate, deoxyribose sugar, and a nitrogenous base
Owls hunting mice with light-coloured fur in dark environments is an example of this type of evolutionary pressure.
selection pressure
What is natural selection?
This term describes the process where organisms better suited to their environment survive and reproduce.
This type of cell division produces gametes with half the number of chromosomes as the parent cell.
Meiosis
Fossils found in deeper layers of rock are generally this compared to fossils in higher layers
older
This base pairs with thymine in DNA
adenine
The ability of a species to survive and reproduce in its environment is referred to as this.
Fitness