Answer:
The correct answer would be the organismal theory.
The three main principles of the cell theory are:
The organismal theory was developed as a counter argument towards the cell theory.
One of the principles of this theory states that "cells are the basic building blocks of life but don't constitute life itself". For example, cells removed from a multicellular organism require specific life support systems in order to keep them alive.
do not use fossil fuels is the answer
Correct do not use fossil fuels is the answer
Answer:
extinct
Explanation:
it will become extinct
B. copper and iron.
C. zinc and magnesium.
D. iron and zinc.
Answer:
Option A
Explanation:
The core of earth has two parts
a) Outer core – The outer core is made up of molten alloy of iron and nickel. However, it also has traces of dense materials like gold, platinum, and uranium etc. These materials are contained at a very high temperature i.e 9,000 and 13,000 degrees Fahrenheit.
b) Inner Core – It is composed of solid dense iron but the iron is not in its purest form. It has some impurities such as sulfur etc. It has temperature ranging between 7000 to 9000 degrees Fahrenheit and is responsible for earth's magnetic field.
Hence, option A is correct
B) global warming, resulting in warmer temperatures on Earth.
C) more people going to the area for recreation and vacations.
D) animals leaving the tundra for warmer regions with less snow cover.
Answer: B) global warming, resulting in warmer temperatures on Earth.
Explanation:
Tundra is the coldest biome of the world. It exhibit very low temperature range and treeless plain with snow precipitation. The global warming is the phenomena which is related with rise in global temperature due to abundance of greenhouse gases into the atmosphere. These gases are released into the atmosphere by burning of fossil fuels, industrial gaseous release and deforestation. These gases traps the heat energy from sunlight making the atmospheric temperature warm. As a result of global warming the ice caps and snow bearing areas of the tundra biome will deplete. The melting of the ice will provide proper unfrozen soil for the growth of plants. Hence, new plants will increase in numbers due to global warming.
their appearance and functions are different.
This is because the liver cell
(1) contains different genes than the muscle cell
(2) expresses different genes than the muscle
cell
(3) destroys the muscle cell genes it contains
(4) lacks the genes found in muscle cells
Answer: The correct answer is-
(2) expresses different genes than the muscle cell.
Liver cell and muscle cell in human are developed from the same single cell but perform different functions that is they are specialized to perform particular function.
It is because there is differential expression of genes in these cells. In other words, specific genes are turned on to perform specific functions and other genes are turned off.
Gene expression means transcription ( formation of mRNA from DNA) and translation ( formation of protein from mRNA) of gene ( a DNA segment, which codes for particular protein) so as to form a specific protein or polypeptide.
The protein thus produced, provides specific function to the cell.
Thus, different genes are expressed in specialized cells ( such as muscle and liver cell), which enables them to perform specific functions.