L.8.2.A
Mitosis/Meiosis
Mitosis/Meiosis
Which type of cell division (mitosis or meiosis) produces 2 identical cells in somatic cells
What is mitosis?
Given the relationship between genes, DNA, and chromosomes, which of the following statements is correct?
A. Chromosomes are comprised of Genes, and Genes are comprised of DNA.
B. Genes are comprised of Chromosomes, and Chromosomes are comprised of DNA.
C. DNA is comprised of Genes, and Genes are comprised of Chromosomes.
D. Chromosomes are comprised of DNA, and DNA is comprised of Genes.
What is D?
Comparing the skeletons of which of the following fish would best show the evolution of a fish species?
A. a male fish and a female fish that could produce offspring
B. the same fish just before it received a cut and after it healed
C. a fish that lived recently and a fish that lived a long time ago
D. the same fish just after it hatched and when it was full-grown
What is C?
Where is an igneous rock such as pumice most likely formed?
What is near volcanoes
What happened to the species that are now used as index fossils?
What is they became extinct?
Which type of cell division (mitosis or meiosis) creates 4 haploid cells as the products
What is meiosis
In a species of bird, there is a dominant allele for long beaks (B) and a recessive allele for short beaks (b). If a homozygous dominant, long-beaked bird is crossed with a homozygous recessive, short-beaked bird, what percent of the offspring would have short beaks?
What is 0?
Which of the following observations best supports the conclusion that two animal species evolved from acommon ancestor in recent geological history?
A.The species are both herbivores.
B.The species have similar bone structures.
C.The species live in the same environment.
D.The species both obtain oxygen from the air.
What is B?
Which of the following areas is most likely to form metamorphic rocks such as gneiss and schist?
A.
a sea floor
B.a windblown desert
C. a site deep underground
D. a site covered by a glacier
What is C?
The following are all reasons for what:
Fossilization is a rare phenomenon
Organism’s remains must be covered by sediment and stay undisturbed for thousands of years.
What is why there are gaps in the fossil record?
These are advantages of which type of reproduction(Sexual or asexual)
creates more variety,
can adapt to changes over time through mutations,
2 parents that contribute to genetic variety
What is sexual reproduction
An unknown plant species is homozygous dominant for round seeds (RR). It is crossed with another plant (Rr). What is the likelihood the offspring will have round seeds, assuming mutations cannot occur?
What is 100%
Favorable traits will be found in all individuals of a population after many generations. What is this process called?
The following are all associtated with what ?
Massive Asteroid Strikes
Extensive volcano eruptions
Global warming or cooling- climate change on land and in water
What is mass extinction?
Comparing the skeletons of a current living horse to the fossils of a horse species from many years ago shows us what?
What is the process of evolution
The following are (advantages or disadvantages) of
(sexual or asexual) reproduction:
faster, produce more offspring, require less energy, no mate needed
What is advantages of asexual reproduction?
According to this law, for a trait, offspring receive one gene/allele from each parent
What is the law of segregation?
What type of speciation occurs when separation is due to physical barriers or results in changes to an organism based upon different ecological factors
What is allopatric or geographic?
How is the rock cycle related to the fossil record?
A. After igneous rock is heated and compressed into metamorphic rock, dead organisms are “captured” into the rock as fossils.
B. As magma begins to cool and solidify into igneous rock, dead organisms are “entombed” within rocks in the form of fossils.
C. As layers of sediment are added over dead organisms, this sediment is compressed into sedimentary rock that creates fossils.
D. As metamorphic rock weathers and erodes via natural causes, dead organisms within the rock become fossilized.
What is C
Which of the following observations best supports the conclusion that two animal species evolved from a
common ancestor in recent geological history?
A. The species are both herbivores.
B. The species have similar bone structures.
C. The species live in the same environment.
D. The species both obtain oxygen from the air.
What is B
In which stage of meiosis does synapsis (coming together of chromosome pairs to exchange material )occur in order to create more genetic variation? This process is known as what?
What is prophase 1 and crossing over or recombination?
Human and environmental factors contribute to genetic variation. Which of the following are mostly environmental factors leading to adaptations and differential success?
A. Plant species reduction from overharvesting.
B. Habitat destruction due to "clear cutting" of the rainforest.
C. Birds' beak shape due to food type and supply.
D.Insect non-resistance when exposed to a new insecticide.
What is C ?
Which of the following conditions would allow a species to more likely survive
A.The environment of the deep sea has changed little over millions of years.
B.The amount of salt in the deep sea has varied greatly over millions of years.
C.The oceans have completely dried up multiple times during the past 400 million years.
D. The oceans have been continuously repopulated by freshwater fish species over millions of years.
What is A?
What has to happen for each type of rock to form?
Igneous
Metamorphic
Sedimentary
What is
Igneous - cooling /crystallization
Metamorphic - heat and pressure
Sedimentary- cementing or packing of sediment
Scientists see three layers of rock exposed on the side of a hill. The bottom layer is sandstone with fossils of
a certain species of reptile found only in this geographic location. The middle layer is volcanic ash. The top layer is mudstone (shale) with fossils of a different species of reptiles.
The fossil evidence supports which hypothesis about the extinction of the older reptile species?
A. The older reptile species went extinct because sea levels rose and flooded its habitat.
B. The older reptile species went extinct because a predator was introduced into the environment.
C. The older reptile species went extinct because it could not compete with the younger reptile species.
D. The older reptile species went extinct because a volcanic eruption caused the environment to change.
What is D