Answer:
In a process called radiometric dating, scientists measure the fix decay rate of an isotope to determine the age of the earth.
Explanation:
In the process of radiometric dating we can find the age of fossils, how long the rocks formed and fossils contains within those rocks. Radiometric is very accurate to date the earth, and radioactive decay of unstable isotopes like uranium, carbon and potassium that are slow to decay.
Scientist measures the fixed decay rate during the radioactive decay, it happens when an unstable atomic nucleus continuous changes to lower energy state and splits the radiation.
the correct answer is D. genetic information is passed from both parents to offspring
Answer:
its B and D
Explanation:
Answer: Plants and animals were made up of same basic structure, which provided support to the cell theory.
Explanation:
Matthias Schleiden stated that plant were composed of cells, and Schwann demonstrated the same fact for animal tissues. In 1839 Schleiden and Schwann formulated the cell theory which states that organisms are composed of cells, which is the smallest unit of life. This means all tissues are made up of cells.
The conclusion is that:
B.) Francis Crick.
C.) Gregor Mendel.
D.) Rosiland Franklin.
I'm almost 100% sure it's C
The correct answer is option C
Gregor Mendel was the one who discovered that the traits have two forms, one is dominant and other one is recessive.
While performing the experiments with the pea plants he came to know about the traits. Every trait has two forms.
The dominant form of trait is visible in the First generation (F1) and the recessive trait is visible in the second generation (F2).
Example: Shape of seed : round (dominant) and wrinkled (recessive)
B) The species has 16 sets of chromosomes per cell.
C) Each cell has eight homologous pairs.
D) During the S phase of the cell cycle there will be 32 separate chromosomes.
E) A gamete from this species has four chromosomes.
For a species with a chromosome number of 2n=16, each cell has eight pairs of homologous chromosomes. There are not 32 chromosomes, 16 sets, or four chromosomes in a gamete.
In biology, the chromosome number 2n=16 indicates that the organism is diploid and has 16 total chromosomes, which are organized into 8 homologous pairs. So, the correct answer is option C) Each cell has eight homologous pairs. The number 16 (2n) represents the total number of chromosomes, not how many sets there are, making option B incorrect. One should not interpret this to mean there are 32 chromosomes in total, so option A is also incorrect. During S phase of the cell cycle DNA replication happens, but this doesn't change the number of chromosomes, just the number of DNA molecules, therefore, option D isn't right. Lastly, a gamete (sex cell) from this species would have n=8, or half the number of chromosomes, contradicting option E.
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B.The population of pea plants in the garden is growing larger in each generation.
C.The decreasing frequency of white-flowered plants shows that the population is drifting.
D.The increasing frequency of purple-flowered plants shows that the population is evolving.
To solve this we must be knowing each and every concept related to population. Therefore, the correct option is option D among all the given options.
Population is the total number of people inhabiting a space, which is always changing due to additions and deletions. The availability of food, the impact of illnesses, and other environmental conditions all have an impact on the growth of a human population, just like they do for any other biological species.
Social norms controlling reproduction and technical advancements, particularly in public health and medicine which have decreased mortality and increased life expectancy, have an additional impact on human populations. The increasing frequency of purple-flowered plants shows that the population is evolving.
Therefore, the correct option is option D.
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The answer is D. The increasing frequency of purple-flowered plants shows that the population is evolving.