Answer 1 : D) Inheritance of acquired characteristics
Jean-Baptiste Lamarck propose a mechanism by which gradual change of species may occur.
According to him the traits an organism gained during its lifetime could be passed to its offspring.
Example: If a giraffe stretched its neck gradually by stretching to reach leaves for many years, Lamarck believed the offspring may have longer necks.
Answer 2: A) Giant Tortoises
Charles Darwin visited Galapagos Islands in 1835. During his visit he observed that different species were in a constant battle for survival with each other, and because of that battle there was a variation in the tortoise that live on the sand and those that live in the water.
LEDs emit light because of energized solids; fluorescent bulbs emit light because UV light interacts with a phosphor coating.
LEDs emit light because of heat; fluorescent bulbs emit light because of energized solids.
LEDs emit light because UV light interacts with a phosphor coating; fluorescent bulbs emit light by concentrating wavelengths of light.
AgNO3 + NaCl → NaNO3 + AgCl is a
a. synthesis reaction.
b. decomposition reaction.
c. single replacement reaction.
d. double replacement reaction.
Answer:
The correct answer is d double replacement reaction.
Explanation:
AgNO3 + NaCl ⇒ AgCl + NaNO3
In this reaction silver nitrate undergo chemical reaction with sodium chloride to generate sodium nitrate and silver chloride.
During this reaction NO3 of AgNO3 is replaced by Cl of NaCl resluting in the formation of AgCl or silver chloride.
on the other hand Cl of NaCl is replaced NO3 of AgNO3 resulting in the formation of NaNO3.
From this point of view it can be said that the given reaction is a double replacement reaction.
sulfur dioxide
carbon dioxide
radioactive waste
radio active waste is the correct answer
b) The endoplasmic reticulum assembles mRNA molecules, and the Golgi apparatus translates them into proteins.
c) The Golgi apparatus assembles mRNA molecules, and the endoplasmic reticulum translates them into proteins.
d) The endoplasmic reticulum assembles
2. The mitochondria in eukaryotic cells is most similar in function to which of the following?
a) military base
b) power plant
c) factory
d) drawbridge
3. A group of students was asked to list some of the similarities and differences between prokaryotic cells and eukaryotic cells. They created the table shown above. The students made a mistake in creating their table. Which statement best describes their mistake? (Points : 2)
a) Prokaryotic cells possess cytoplasm, while eukaryotic cells do not.
b) Both prokaryotic cells and eukaryotic cells possess a nucleus.
c) Both prokaryotic cells and eukaryotic cells are enclosed by a plasma membrane.
d) Eukaryotic cells possess ribosomes, while prokaryotic cells do not.
The ER assembles proteins, and the golgi body modifies and packages them.
Power plant
b) Both prokaryotic cells and eukaryotic cells possess a nucleus.
The endoplasmic reticulum and Golgi apparatus work together in protein synthesis and modification, mitochondria function like a cell's power plant, and eukaryotic cells - unlike prokaryotic cells - possess a nucleus.
1. The correct description of one way in which the endoplasmic reticulum and Golgi apparatus work together is not represented among the options provided. However, to clarify, the endoplasmic reticulum is responsible for assembling proteins and lipids, while the Golgi apparatus modifies, sorts, and packages these proteins and lipids for transport.
2. The mitochondria in eukaryotic cells is most similar in function to a power plant (option b) as it's responsible for producing the energy (ATP) that the cell needs to function.
3. The mistake in the students' table of similarities and differences between prokaryotic cells and eukaryotic cells is option b. Only eukaryotic cells possess a nucleus, while prokaryotic cells do not.
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