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WorksheetsBiology practice quiz 8th grade
Total questions: 28
Worksheet time: 38mins
How are DNA sequence's read
One at a time
Two at a time
3 at a time
Like a book
Building block of life
contains ribose
made of amino acids
contains Uracil
How many people in this whole pedigree are heterozygous?
7
3
4
6
5
The figure shows how natural selection of a single-trait gene affects lizard survival.
Which of the following most likely causes the changes in allele distribution?
The allele for light gray coloration disappears from the population. This may be because light gray lizards are more visible to predators and therefore they might be less likely to survive and reproduce.
The allele for black coloration decreases fitness and becomes less common. This may be because black coloration keeps the lizards cool during hot summer temperatures.
Medium gray coloration in lizards appears to be a neutral mutant allele that allows the lizards to hide better from predators. This leads to increases in phenotype and allele frequency of gray coloration.
Because black and medium gray lizards are less visible to predators, these alleles are neutral to natural selection and therefore will not disappear from the population of lizards.
Natural Selection is driven by a change in the environment and survival of the
Earth
Fastest
Fittest
Biggest
"Organisms that are better adapted to the environment survive to pass traits to their offspring" is the definition of
Natural Selection
Evolution
Selective Breeding
Artificial Selection
The pair of population graphs below display the results of two different five-year hunting cycles, one on light trees and one on dark trees. The population of light-colored moths is shown by the light gray dots, and the population of dark moths is shown by the dark gray dots. How do these results demonstrate natural selection?
The moth populations shown here demonstrate random fluctuations over time that are not explained by tree color.
On light trees, individual moths tried to become lighter in color to match the tree background. On dark trees, individual moths tried to become darker in color.
The moths that were the same color as their background were more likely to survive and reproduce. Over time, the populations of these well-adapted moths increased.
Small particles of tree bark became embedded in the moth’s wings, causing the moths to become darker on the dark trees and lighter on the light trees. These acquired traits were then passed down to the next generation of moths, causing the populations to change color over time.
Mutations are always harmful to an organism's survival.
True
False
When the CYTOPLASM splits in two at the very end of Mitosis...
Metaphase
Cytokinesis
Interphase
Prophase
What stage of mitosis is depicted here where 2 new nuclei have formed?
Prophase
Metaphase
Anaphase
Telophase
What stage of mitosis is depicted here
Prophase
Metaphase
Anaphase
Telophase
Which of the following are CORRECT observations about the differences between MITOSIS and MEIOSIS? (Check all that apply.)
Mitosis produces cells that identical to the parent cell.
Meiosis produces cells that have half the number of chromosomes as the parent cell.
All cells go through INTERPHASE as part of the cell cycle, whether it goes to mitosis or meiosis next.
In both types of cell division, the chromosomes are only duplicated once.
Only in Mitosis, do you see chromosomes pair up to form a tetrad.
What phase of Meiosis is in this picture?
Prophase I
Metaphase I
Anaphase I
Telophase I
What is the common ancestor of Letters C and E?
1
2
3
4
What is the best inference about biochemical relationships that could be made from this model?
The amino acid sequences of a lancelet and a tuna are more similar than that of a tuna and a salamander. This is due to the lancelet and the tuna both residing entirely in water while the salamander can survive on land.
The amino acid sequences of a salamander and a turtle are less similar than that of a turtle and a leopard. This is due to the turtle and the salamander both being adapted to life in water or land.
The amino acid sequences of a lancelet and a tuna are less similar than that of a tuna and a salamander. This is due to the lancelet and the tuna splitting from a common ancestor longer ago.
The amino acid sequences of a salamander and a turtle are more similar than that of a turtle and a leopard. This is due to the turtle and the salamander both being adapted to life in water or land.
