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alexgriva [62]
3 years ago
14

Choose a starting

Biology
1 answer:
NNADVOKAT [17]3 years ago
4 0

Answer:

Nitrogen is present in the atmosphere in a molecule form about 78 percent. This nitrogen comes to the earth with the water through rainfall. Some nitrogen fix by beneficial microorganisms such as Cyanobacteria and Azotobactor which are present in the roots of higher plants. These microorganisms convert nitrogen molecule into nitrates and used by the plants. There are some other microorganisms which again convert nitrate into nitrogen molecules, called denitrifying bacteria and nitrogen molecule goes to the atmosphere again and complete the cycle.

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A challenge to traditional (pre-1860) ideas about species came from embryology, when it was discovered that _____. see concept 2
timofeeve [1]
A challenge to traditional (pre-1860) ideas about species came from embryology, when it was discovered that embryos of dissimilar organisms, such as sharks and humans, resemble each other. Embryology involves the study of the formation and the development of an embryo and the fetus. It is one type of evidence of evolution such that the embryos of many different kinds of animals, mammals, reptiles, birds, fish among others, are similar showing a common ancestry. 
4 0
3 years ago
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1. Which of the following is the most appropriate definition of organic compound? a compound that contains carbon atoms bound to
disa [49]

Answer:

Option A, a compound that contains carbon atoms bound to other elements

Explanation:

An organic compound is one which has at least one carbon atom that is bonded to several other atoms (may be metallic or non metallic) by a single or double bond is termed as organic compound .  The most common atoms with which carbon forms bond are hydrogen, nitrogen,and oxygen.

Some common examples are -

Methane - CH_4

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Hence, option A is correct

3 0
3 years ago
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Biology MCQs please help
joja [24]
<h2>MCQ:- </h2>

<h3>ANSWER:-</h3>

  1. Tissue
  2. Unicellular Prokaryote
  3. Must be correct
  4. Not include in any kingdom

<h2>Explanation:- </h2>

(1) Group of cell that work together as one to perform a single function is termed as Tissue . Then the group of tissue combine to form organs and further they combine to organ systems and further they combine to form organ system .

(2) They are unicellular green algae which belongs to family Volvocaceae of the Plantae Kingdom

(3) Hypothesis is the assumption which are taken on the behalf of the observation on small <u>scale</u> . They can be correct or incorrect depends on the number of observation and Hypothesis.

(4) Viruses are included in any of the kingdom because they are on the intermediate line of living and non living as they show properties of non living outside the host and properties of living inside the host

8 0
3 years ago
Explain the relationship between each pair of terms: A. gene and chromosome B. gene and DNA C. gene and allele D. allele and mei
vladimir1956 [14]

Answer: I think it’s b

Explanation:

5 0
3 years ago
MDCK and A549 cell cultures were grown in complete minimum essential medium (MEM) with 10% fetal bovine serum (FBS), 100 U/mL pe
UkoKoshka [18]

Answer:

Used the C1V1 = C2V2 method for calculations

Explanation:

Component      Calculation       Volume of Stock to be added

FBS:             100*V1 = 10*25                  2.5 mL

Glutamine:     200*V1 = 2*25                  0.25 mL

Penicillin:      10000V1 = 100*25          0.25 mL

Streptomycin:     10000V1 = 100*25            0.25 mL

NB: C1 = Stock Concentration; V1 = Volume of stock required; C2 = Final concentration required; V2 = Final volume required

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