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soldier1979 [14.2K]
3 years ago
7

A theory of evolution that states that a species evolves in spurts of rapid change and then goes through periods of no change is

known as
Biology
2 answers:
aleksklad [387]3 years ago
8 0
<span>punctuated equilibrium.

</span>
Alisiya [41]3 years ago
7 0

D is the correct answer


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2 Points
SVEN [57.7K]

Answer:

B, A fossil found in rocks from one time period

Explanation:

Fossils are used to determine the ages of rock layers. Index fossils are the most useful for this. Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in. Hope that this helps you :)

3 0
2 years ago
Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, w
Rashid [163]

Answer: 1, 2, 4 are accurate.

Explanation:

1. Joe is on a hill (on a trail) above the ocean. The beach and ocean are at similar altitudes. Therefore Joe is at a higher altitude than if he was at the beach.

2. Since Joe is on a hill, he has a higher altitude than at sea level. Air at a higher altitude has lower density because there is less air "ontop" of itself than at lower altitudes. As well, his hill is above the ocean, which means there is a lot of water, making the air more humid than where he is. Humidity also makes air denser.

4.The air pressure will decrease if Joe goes up to higher altitudes because there will be less air on top of itself.

4 0
3 years ago
Read 2 more answers
Historically, African elephants have had large ivory tusks. For many years, poachers (illegal hunters) have been killing elephan
Naily [24]

The Answer is A

~VERNEX

6 0
3 years ago
Read 2 more answers
Martha can produce eggs however the eggs cannot pass into the uterus. Which part of her body is not functioning correctly
kirill [66]

Answer:

B. fallopian tubes

3 0
2 years ago
In hemoglobin Rainier, Tyr 145β is replaced by Cys, which forms a disulfide bond with another Cys residue in the same subunit. T
lions [1.4K]

Answer:

Hemoglobin rainier differ from normal hemoglobin with respect to oxygen affinity.

Explanation:

Hemoglobin is one of the most significant protein of Red Blood Cell containing heme(that contain Fe2+ which is coordinated with four porphyrine rings) and globin protein.

  Hemoglobin exist in two state one is tensed state or deoxy hemoglobin that have less affinity for oxygen, the other state is relaxed state or oxy hemoglobin that has high affinity for oxygen.

              In hemoglobin rainer the formation of new di sulfide bond prevent the formation of ion pairs that normally stabilize the T state as a result T state get unstable and this unstable T state is converted to R state to achieve the stability of hemoglobin structure.

           The R or relaxed state of hemoglobin has high oxygen affinity for oxygen.

                     

         

4 0
3 years ago
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