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vladimir2022 [97]
2 years ago
13

what does it mean to describe a scientist as skeptical? Why is skepticism an important quality in a scientist?​

Biology
1 answer:
grigory [225]2 years ago
7 0
A skeptical scientist is one who questions the reliability of certain kinds of claims by systematically investigating them. it is an important quality in a Scientist because it helps them remain objective when performing scientific injury and research, it also forces them to examine claims to be certain that there is sufficient evidence to back them up
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Which of the following describes the embryonic period? the period during which the zygote moves down to the uterus and begins to
muminat

Answer:

Option (2).

Explanation:

Zygote is formed by the fusion of the male and female gamete during the process of sexual reproduction. The zygote undergoes further development inside the female womb.

The embryonic period starts from the third week after the conception. The important organs and structure development occur during the embryonic period. The formation of three germ layers occur in this period.

Thus, the correct answer is option (2)

6 0
3 years ago
_________ is a smooth muscle cell has a central nucleus but lacks striations.
Natalija [7]

Answer:

Linings of hollow organs

Explanation:

Smooth muscle cells are usually found in the lining of hollow organs such as all arteries and veins, wall of stomach, uterus, urinary bladder, digestive system etc. The cells of these linings are spindle shaped and consist of a nucleus at the center which lacks striations.  

They work as a housekeeper and are under involuntary control except the heart. They lack striation because of irregular arraying of actin and myosin filament along the length of the cell.  

4 0
3 years ago
Do you think microbes, such as bacteria, viruses, fungi, and parasites, are
Blizzard [7]
I think they are good and bad
7 0
3 years ago
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
The kingdom that includes all the unicellular organisms that do not fit into any other category is
kotykmax [81]
I’m pretty sure the answer is c. Protista. Hope this helps!
7 0
2 years ago
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