Complete question:
Examine the following diagrams. Columns I and II contain rock layers A, B, C, D, E, and F. Both columns were taken from the same dig site at different locations. Which two layers are of approximately the same age? (Note: The diagrams are attached).
Answer:
C and D
Explanation:
Layers C and D apparently contain the same fossilized organisms in the same substrate. Their appearance is very similar. By knowing that certain organisms used to live in a certain period of time, if we find two strata that show the same fossilized organisms, then we can estimate that these two strata are the same age. Fossilized organisms are used to estimate the age of a rocky stratum.
Life history can be illustrated through fossilized organisms trapped or converted into rocks. These fossils are known as index or guide fossils, of animal or vegetal nature, and they can apport information about the rocky stratum in which they are located or incrusted. These fossils are used to determine the age of the rocky sediments or the environmental conditions under which they were deposited.
The repeating stages a cell experiences, including cell division, compose the cell cycle, it is a sequence of events that lead first to the growth of the cell and later to the division into daughter cells. The cell cycle begins at the moment when a new cell appears, descended from another cell that has been divided, and ends at the moment when said cell, by subsequent division, originates new daughter cells.
Answer:
Mitochondria are double membrane bound cytoplasmic organelles present in most eukaryotic cells. They are responsible for aerobic respiration.
Explanation:
Answer:
option c is correct that is 32
Explanation:
meiosis occur in two phases in the first phase DNA replication occur and amount of DNA becomes doubled without any changes in the chromosomes number and two daughter cells( each 2n) are formed
now in stage 2 each daughter cell undergoes mitosis with the formation of two cells each with half chromosomes (n)
now 2n =32
n=32/2=16
after meiosis stage 1 ........ two daughter cell each with 32 chromosomes
stage 2.... each daughter cell form two grand daughter cell each with 16 chromosomes
Answer:
Option D, 7.5
Explanation:
In this question,
Heritability is defines as Response divided by Selection
Here response = the height of the species produced as result of cross between the selected species
While selection = the height of the species selected for cross.
Since, Dave has selected the tallest plants ( which are 7.5 feet tall) for breeding, thus it can be referred as selection here.