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denis23 [38]
3 years ago
10

1. Why do scientists use the scientific method?

Biology
1 answer:
Xelga [282]3 years ago
6 0

1. Answer: to answer questions about the natural world


The aim of scientific method is to answer a question that the scientist have. To answer the question, the scientist need to design a research or observation. If the research is flawed, the result might not match with the scientist aim and the conclusion will be wrong. Scientific method can be used to help design the research so it will have less flaw


2. Answer: fertilizer

The student wants to determine the effect of a certain brand of liquid fertilizer on the growth of ivy. The fertilizer are hoped to influence the growth of the ivy. Independent variable is the variable that hoped to influence the dependent variable. So, the independent variable would be fertilizer and the dependent variable would be the growth.

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c. Suppose a large population of turtles consists only of two species, snapping turtle and box turtle, but the percentage of the
vodka [1.7K]

Answer:

D_m=1/2      

Explanation:

From the question we are told that

2 species

Assuming that questions a and be are solved

Diversity index D=2p_1p_2

with p_1 +p_2 =1

Mathematically

D=2p_1(1-p_1)

D=2(p_1-p_1^2)

D=2({\frac{1}{4} -(p_1-1/2)^2}

Therefore

D=\frac{1}{2} -2(p_1-1/2)^2

Giving

D_m=1/2      

p_1=1/2

6 0
3 years ago
Do fossil fuels release carbon dioxide when burned?
Ray Of Light [21]
Yes when fossil fuels are burned they release the carbon dioxide locked inside of them
that is why fossil fuels are a big source of global warming and we will eventually run out of fossil fuels 
5 0
3 years ago
Read 2 more answers
Diastole is the ________ phase of the cardiac cycle.
STatiana [176]
Diastole is the relaxation phase of the cardiac cycle. It is the normal rhythmic dilation of the heart's valves. During this time, the valves start to gather blood inside of their chambers. There are two types of diastole that occur in the heart, and they are:

1. Ventricular diastole - this is the period where the ventricles are filling and relaxing. 
2. Atrial diastole - the period in which the atria are relaxing. 

This is a continuous cycle that occurs in the heart the moment a person is conceived until the person meets his/her death.
6 0
3 years ago
Why would an athlete need to be concerned about a twitch or sustained contraction​
prisoha [69]

Answer:

why an athlete would need to be concerned about twitches or contractions is because, whenever they perform, and such thing happens, it will most likely distract the athlete, and cause the athlete doing his/her performance to not be as good, and may lead to failure, for example, when someone is running very fast for a sprinting race, and he has a contraction in his leg it will cause him to react by showing signs of pain by slowing down or even tripping and falling, causing him to lose the race.

Hope this Helped!

5 0
2 years ago
Read 2 more answers
13. A biochemist isolated and purified molecules needed for replication. When DNA was added, replication occurred but the DNA mo
zalisa [80]

Answer:

DNA ligase

Explanation:

DNA replication is a process whereby a particular DNA makes a copy of or synthesizes itself. It consists of several steps with some important enzymes for successful, error free replication. The various steps are as follows;

  • Unwinding of the double helix structure of the DNA and formation of replication fork. The enzyme involved here is the DNA helicase.
  • Primer, a short piece of RNA becomes synthesized and binds to the 3' end of one of the 2 strands of the DNA, the leading strand. The enzyme involved is the DNA primase.
  • Replication of the <em>leading strand</em> then proceeds with the elongation of the primer through the addition of bases in the 5' to 3' direction leading to the formation of continuous strands.
  • The other strand of the DNA, known as the <em>lagging strand </em>starts its own replication by binding with multiple primers at different regions of the strand. Bases are then added to each primer leading to the formation of several, short discontinuous DNA strands known as Okazaki fragments. The enzyme involved in the elongation process is the DNA polymerase.
  • Next is the termination of the replication process after the formation of the continuous and discontinuous strands. Exonuclease enzyme removes primers from the synthesized strands. Primers are replaced by appropriate DNA bases and the Okazaki fragments are joined to form a unified DNA strand by an enzyme known as the DNA ligase.

The many, few nucleotides long DNA segments observed by the Biochemist are the Okazaki fragments that should have been joined together by the DNA ligase.

Hence, DNA ligase must have been the component left of the mixture.

7 0
3 years ago
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