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Anastasy [175]
3 years ago
9

"by measuring the relative abundances of two stable isotopes of oxygen - 16o and 18o - in some fossil deposit, or in an ice core

, or in a coal bed, or in some sedimentary layer, what can one determine about the conditions that pertained at the time those deposits were laid down
Biology
1 answer:
maks197457 [2]3 years ago
5 0
Stable isotopes refers to those isotopes that do not undergo radioactive decay. Oxygen atoms with atomic number of 16 and 18 are examples of stable isotopes. These isotopes of oxygen are usually found in substances such as polar ice and calcite. These substances are usaually measure with isotope fractionation and the ratios obtained are used to estimate water temperature of ancient oceans. From this, scientists can find out facts about ancient climates, 
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If a population is steady at its carrying capacity, but then a group of organisms from that species moves in to the same space o
baherus [9]

Answer:

It will remain relatively stable

Explanation:

<u>The carrying capacity (k) of an environment is a factor that represents the maximum number of organisms of a particular species such environment can support based on the resources it has. </u>

<em>Below the carrying capacity</em>, the population of a species still has the potential to increase due to resource availability, and <em>above the carrying capacity</em>, the population has the potential to reduce due to the overstretching of the available resources. Factors that keep the population from expanding significantly beyond the carrying capacity include competition for resources, natural disasters, disease outbreaks, etc.

<em>Hence, if a population is steady at its carrying capacity and a group of organisms from that species moves into the same space occupied by the original population, the carrying capacity will only increase temporarily before factors such as competition and natural disasters operate to bring the carrying capacity to the normal level. </em>

7 0
2 years ago
A student is studying the amino acid sequence of a protein shared by four organisms. The student wants to know which organism is
MariettaO [177]

Answer:

Organism D.

Explanation:

Amino acids are the monomers of proteins and are linked together by the peptide bond. The protein is obtained from the RNA molecules by the process known as translation.

The amino acid sequence of the proteins can also be used to study the evolutionary relationship between the organisms and the closeness of teh organisms with each other. In the question it is give that organisms A and D has least difference ( 1 amino acid sequence difference) and more related with each other.

Thus, the answer is organism D.

5 0
3 years ago
What is the main difference between protein domains and protein subunits? Group of answer choices1. Protein domains do not have
shusha [124]

Answer: 2. Each subunit represents a separate polypeptide chain, while one polypeptide chain may contain several domains.

Explanation: Each subunit constitutes of one polypeptide chain. A polypeptide chain has one particular gene coding for it. thus it simply implies that a protein must have one gene for each subunit.

Many proteins is made up of different protein domains. A particular domain may appear in a variety of different proteins.

domains are stable on there own, they can be exchanged via genetic engineering between one protein and another.

3 0
3 years ago
The best compression rate for an 8 year old would be (pick the most appropriate answer):
KiRa [710]
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4 0
2 years ago
The boundary between the middle and inner ear is the
Kamila [148]
<span>It is separated from the external ear by the
eardrum.</span>
6 0
3 years ago
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