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oksian1 [2.3K]
3 years ago
11

Which statements correctly describe whether a compound is a pure substance

Biology
1 answer:
kirill115 [55]3 years ago
6 0
I am sure that the correct answer is B 
if i am wrong let me know
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Write a short note on genetic diversity and proper use of resource​ ?
Lelechka [254]

Explanation:

Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species. ... Genetic diversity serves as a way for populations to adapt to changing environments.

The need to increase efficiency and productivity while preserving natural resources, especially water and soil, is great. ... Advertisement. In light of these realities, growers are under pressure to produce more, pollute less, fulfill consumer preferences, and make a living.

4 0
3 years ago
A plasmid 41 twists and 6 right handed writhes. What is the Lk for this plasmid?
OLEGan [10]

Answer: Lk for this plasmid = 47

Explanation:

The formula to compute Lk is given by :-

Topological Linking Number (Lk): Twist (Tw) + Writhe (Wr)

Given: A plasmid 41 twists and 6 right handed writhes.

i.e. Twist (Tw) = 41   , Writhe (Wr) = 6

Then, Topological Linking Number (Lk) for this plasmid :  = 41+6

= 47

Hence, the Lk for this plasmid = 47

3 0
2 years ago
The cytochrome oxidase test is used primarily for the identification of
kolbaska11 [484]
The cytochrome oxidase test is used primarily for the identification of GRAM NEGATIVE ORGANISM. 
The oxidase test is used to identify bacteria which synthesize cytochrome C oxidase enzyme, which is an enzyme of the bacterial electron transport chain.
6 0
3 years ago
A geneticist is studying a disease trying to determine how its inherited. DNA testing was completed on three generations of a fa
Anton [14]

Answer:

X-linked recessive inheritance

Explanation:

Since the disease is primarily present in males vs females, it is a s.ex linked disease.

In X-linked recessive inheritance, males tend to get disease b/c they only have one x (the other is y) which means if they get the bad "x" copy from mom then they definetely will get the disease.

Females can be carriers b/c they are XX. If they get a good copy from mom and suppose a bad copy from dad, they can still be healthy b/c the good copy is dominant. They will be carriers (cuz they have the bad copy) but themselves wont have the disease.

6 0
2 years ago
Chromosomes are lined up in the middle of the cell during which phase of mitosis?
Katarina [22]
Chromosomes are lined up in the middle of the cell during metaphase. 
8 0
3 years ago
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