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Alina [70]
3 years ago
15

What do all scientfic investigations begin with​

Biology
2 answers:
Crank3 years ago
7 0
Most scientific investigations begin with observations and lead to questions. the act of noting and percieiving objects or events by using the senses. ... scientists conduct controlled experiments or perform studies in order to test a hypothesis.
gavmur [86]3 years ago
4 0

most scientific investigations begin with observations and lead to questions. scientists conduct controlled experiments or perform studies in order to test a hypothesis.

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What is a hydrogen atom and carbon atom? <br> What are elements?
Anna71 [15]

Answer:

A hydrogen atom is an atom of the chemical element hydrogen.Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.

In chemistry, an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.

Explanation:

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3 years ago
What causes the nebula to collapse into a flattened spinning disc?
viktelen [127]
Due to collisions between particles in the spinning cloud, the solar nebula begins to flatten. The particles in the gas cloud first have all different speeds in different directions. As they start colliding with each other, their final velocity is the average of the two initial velocities before collision.
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3 years ago
. Luraine, who has blood type o, has a child with blood type B. She claims Will is the
Amiraneli [1.4K]
Blood typing can identify if will is the father or not by the composition of the genotype and it’s compatibility within the parents.

Will can not be the parent as there is only one possible genotype composition of blood type AB being i^Ai^B.
8 0
3 years ago
What will happen if the pollen tube pore its content inside the embryo sac?
anastassius [24]

Answer:

Once the embryo sac has developed, pollination has occurred, and the pollen tube has grown into the ovary to make contact with the ovule, fertilization (fusion of egg and sperm) can occur.Typically, the pollen tube reaches the embryo sac via the micropyle (Greek, mikros + pyle = small opening), or opening, in the integuments of the ovule.. There, it discharges its sperm into the embry

Explanation:

The pollen tube enters into the ovule, through the micropyle. Inside the embryo sac, the tip of the pollen tube ruptures and the 2 male gametes are set free near the egg apparatus. Inside the embryo sac, one of the 2 male gametes fuses with the egg nucleus and forms a diploid zygote. This process is called syngamy or true fertilisation.

6 0
3 years ago
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What is dna ? and what is the purpose of dna
liberstina [14]

Answer:

Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.

Explanation:

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