Answers
Answer:
These fossils indicate that North America must have had a much warmer (i.e a tropical environment 370 million years ago)
Explanation:
Corals are marine animals whose skeletons are easily fossilized and thus have an extensive fossil record. There are many fossils of extinct corals in North America. For example, Lophophyllum is a North American extinct genus of corals dated at 320 million to 290 million years ago (i.e., from the Late Carboniferous period). In general, corals live in warm seawater, and thereby their fossil records can be used as indicators of environmental conditions.
The coral fossils' presence suggests that North America was located near the equator 370 million years ago, within the subtropical climate zones where corals thrive the most.
These seasonal changes in density create growth rings, similar to those found on trees. Scientists can use these rings and other features to determine the climatic conditions during the growing season of the coral.
By comparing the soil and plant and animal evidence at a site, scientists can get a general idea of what the environment was like in the past. By comparing living plant and animal evidence to these ancient remains, scientists can get an idea of what the environments were like.
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Related Questions
1. What is the equation for the equilibrium constant, Keq, for the following general reaction: aA + bB → cC + dD Define each term in the equation. 2. What is the actual free energy change of the reaction above? Again, define each term in the equation. Express this equation in terms of mass action Q 3. What is the standard free energy change of the reaction above? Again, define each term.
Which of the folowing represents characteristics of the four planets closest to the sun?
It is an ecosystem that normally functions without human tending
What are the monomers of the following biomolecules:A. Carbohydrate B. Lipid C. Protein D. Nucleic Acid
Answers
Answer: e. 2.5 ml
Explanation:
According to the dilution law,
where,
= concentration of stock solution = 20X
= volume of stock solution = ?
= concentration of required solution= 1X
= volume of required solution= 50 ml
Thus 2.5 ml much of a 20X tricaine stock solution is needed to dilute in order to make your solution.
giving the cell a rigid, inflexible shape.
B
allowing water to pass into the cell.
с
protecting the cell from the outer environment.
D
regulating movement of materials in and out of the cell.
Answers
Cell membranes have each of the following functions except for giving the cell a rigid, inflexible shape. Thus, the correct option for this question is A.
What is a Cell membrane?
A cell membrane may be defined as a type of biological membrane which separates the inner surroundings of the cell with respect to the outer environment. It is semi-permeable in nature. It performs numerous functions for increasing the survival of an organism.
Cell membranes generally protect the inner content of the cell along with various organelles from the outer environment. It also regulates the movement of materials in and out of the cell either by simple diffusion or by transporters. It allows the easy passage of water into the cell.
Therefore, cell membranes have each of the following functions except for giving the cell a rigid, inflexible shape. Thus, the correct option for this question is A.
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Answers
Whenever POPs move thousands of kilometers from their source of release throughout a cycle is described as a "Grasshopper effect".
- Global distillation occurs when prevailing ocean as well as atmospheric currents transport toxins towards the Arctic, where they have been confined by the freezing environment.
- This would be known also as the "grasshopper effect," since chemicals constantly evaporate as well as condense during their way towards the Arctic.
Thus the response above i.e., "Option b" is right.
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Answer:
b. grasshopper effect
Explanation:
Persistent Organic Pollutants or POPs are organic chemicals that cause a lot of damage to environment and living beings. They are generally industrial chemicals or pesticides for example, DDT. They are toxic and not degraded easily. They tend to get accumulated in living tissues and increase in concentration as we move upwards in a food chain.
When POPs are transported to areas far from their original site, the phenomena is called as grasshopper effect. They are carried by wind in atmosphere and finally settle down on land from where they evaporate again to enter the atmosphere. Thus, the cycle continues. Eventually, they can reach to an area thousands of kilometers away from their original source.
Answers
Transcription occurs along a 3'-5' template forming an mRNA in the 5'-3' direction.
WHAT IS TRANSCRIPTION:
- Transcription is the process by which a mRNA molecule is synthesized from a DNA template.
- Transcription occurs in the nucleus of eukaryotic organisms where the information stored in the DNA molecule is used to produce a complementary mRNA sequence that conveys it to the ribosome.
- Transcription occurs in the 3'-5' direction, and since the mRNA molecule is complementary, it'll be in the 5'-3' direction.
Therefore, transcription occurs along a 3'-5' template forming an mRNA in the 5'-3' direction.
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Answer:
3' to 5'; 5' to 3'
Explanation:
The DNA strand with 3' to 5' polarity serves as a template for the process of transcription. Using the 3' to 5' DNA template strand, the enzyme RNA polymerase catalyzes the formation of RNA. The ribonucleotides are bonded together by phosphodiester bonds that are formed in 5' to 3' direction only. The formation of RNA occurs in 5' to 3' direction. The DNA template strand has a complementary nucleotide sequence to the newly synthesized RNA.
Answers
The correct answer is option B, that is, resilient.
The Alaskan woodland more usually than not encounters with the incidents of fire regularly with the prime goal to better the cycling of supplements of the environment. One of the plants found in the Alaskan woodlands is Alaskan spruce and it is an exceptionally versatile plant. This signifies that when it gets destructed due to fire occurrences, it grows back briskly.
the answer is; it is resilient. hope this helps
the G1 phase
the S phase.
O the G2 phase.
mitosis.
Answers
Final answer:
The G2 phase of the cell cycle is when rapid cell growth in preparation for cell division occurs. This is after DNA replication and before mitosis.
Explanation:
Rapid cell growth in preparation for cell division occurs during the G2 phase of the cell cycle. The cell cycle is a four-stage process consisting of the G1 phase (gap 1), the S phase (synthesis), the G2 phase (gap 2), and mitosis. During the G1 phase, cells grow and prepare for DNA replication which happens in the S phase. In the G2 phase, the cell experiences rapid growth in preparation for cell division, cell size increases dramatically, and proteins necessary for cell division are synthesised.
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