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sdas [7]
3 years ago
13

What is the “main sequence” refer to

Biology
1 answer:
Allushta [10]3 years ago
3 0
<span>Hello, to answer your question. The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness

       Signed by, Virtuoso Sargedog</span>
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Question 1: Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant i
Bumek [7]

Answer:

q1 : ribosomes because they are responsible for protein synthesis

q2 : by transporting potassium ions into the cell and sodium ions out of the cell maintaining a concentration gradient

q3 : seawater contains a high concentration of sodium and chlorine ions that the Atlantic cod gets rid of by actively transporting them out of its body

8 0
3 years ago
_______ look at the genetic tendencies that we share as a species, whereas _______ explore human genetic differences.
Reika [66]

Answer;

Evolutionary psychologists; behavioral psychologists

Evolutionary psychologists look at the genetic tendencies that we share as a species, whereas behavioral psychologists explore human genetic differences.

Explanation;

-Evolutionary psychology is a theoretical approach to psychology that attempts to explain useful mental and psychological traits such as memory, perception, or language,as the functional products of natural selection. Evolutionary psychology is focused on how evolution has shaped the mind and behavior.

-Behaviorism is concerned with how environmental factors affect observable behavior. The behaviorist approach proposes two main processes whereby people learn from their environment: namely classical conditioning and operand conditioning.

3 0
3 years ago
To compare the relative ages of fossils, scientists sometimes use an easily recognized
Natalka [10]
<h2>Answer:</h2>

The fossil is <u>A) </u><u>Index fossil</u>.

<h2>Explanation:</h2>

Index fossils refer to the type of fossil which is used to characterize and distinguish geologic periods. Due to this function of index fossil, they are also called as guide fossil or indicator fossil.  These fossils must have a short vertical range, wide geographic circulation, and quick developmental patterns.

Another term, Zone fossil is utilized when the fossil have every one of the characters expressed above with the exception of wide topographical dispersion, they are restricted to a zone and can't be utilized for relationships of stratas.

7 0
3 years ago
Which contraceptive method is 100 percent effective at preventing pregnancy?
emmainna [20.7K]

The correct answer is D. Abstinence

Explanation:

A contraceptive method or birth control method refers to a method used to avoid pregnancy or reduce the probability of getting pregnant. From antiquity, there have been different contraceptive methods but only in the last decades, methods have been designed based on science and its effectiveness has been studied.

Because of this, nowadays there are many contraceptive methods such as pills, condom, and implants that are about 80% to 95% effective, sterilization that is a around 98% effective and natural methods that have a lower percentage of effectiveness. But the only method that has been proven as completely effective or 100% effective is abstinence because by avoiding any type of sexual intercourse it is virtually impossible an egg can be fertilized by a spermatozoid.

7 0
3 years ago
Scientists have worked on the structure of DNA and one of their revelations is the antiparallel arrangement of DNA strands. Whic
Lynna [10]
According to my observations the best answer is the option C.<span>The DNA strands are so arranged that you can never have two 5' or 3' at one end.
</span><span>As,they are anti-parallel and for that reason, one strand goes 5'-3' and the other goes 3'-5' respectively.
I hope its helpful.

</span>
3 0
3 years ago
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