Answer:
The nucleus.
This organelle is where most DNA or genetic material is found in cells.
,
Answer:
dioptre is si unit of focal length
where 1 dioptre = 1 m^-1
Ecology is the study of interactions among organisms and their environment.
The definition of ecology aligns with option c: the study of interactions among organisms and between organisms and their environment. This scientific field aims to understand the distribution and abundance of living organisms, the interactions between these organisms and their surroundings, and how such interactions are affected by natural and human-made changes to the environment.
Besides, the other options given represent the concepts related to but not accurately defining ecology. For example, option a refers to environmentalism, while option b refers to recycling, and option d typifies sustainable living.
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O zygote
O gastrula
blastula
Answer: blastula
Explanation: an animal embryo at the early stage of development when it is a hollow ball of cells.
B) Two sister chromatids exchange identical pieces of DNA.
C) Specific proteins break the two strands and re-join them with their homologs.
D) Each of the four DNA strands of a tetrad is broken and the pieces are mixed.
E) Maternal alleles are "corrected" to be like paternal alleles and vice versa.
Homologous chromosomes crossover during meiosis when specific proteins break two DNA strands at corresponding points and re-join them with their homologs, resulting in an exchange of genetic material.
When homologous chromosomes participate in a process called crossover during meiosis, option C) takes place. Specific proteins cause the two DNA strands to break at corresponding points. These proteins then re-join them with their homologs, switching certain sections of DNA between the two chromosomes. This process is a fundamental feature of sexual reproduction and contributes to genetic diversity because the chromatids that undergo exchange, although from homologous chromosomes, are not identical.
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b. Predictions
c. Explanations
d. Observations
The common characteristic among hypotheses, theories, and laws is: c. Explanations
Hypotheses, theories, and laws are different parts of what scientists know and understand about the world. Although they are not exactly the same, they both have one thing in common: they both explain things we see happening.
A hypothesis is a guess about why something happens or is observed. Typically, it is based on first observations and needs more testing and investigation to find out if it is true.
Read more about hypotheses here:
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Answer:
d is the correct answer on edge
Explanation: