1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anit [1.1K]
3 years ago
5

Which important event in Earth’s history occurred during the Jurassic period?

Biology
1 answer:
DIA [1.3K]3 years ago
5 0

Answer:

The start of the period was marked by the major Triassic–Jurassic extinction event. Two other extinction events occurred during the period: the Pliensbachian-Toarcian extinction in the Early Jurassic, and the Tithonian event at the end; neither event ranks among the "Big Five" mass extinctions.

You might be interested in
Sir charles sherrington observed that impulses took an unexpectedly long time to travel a neural pathway. his observation provid
Karo-lina-s [1.5K]

Sir Charles Sherrington’s observation has provided evidence for the existence of synaptic gaps in which this is the minute space provided in between of the target cell and the cell membrane of the axon terminal. This could be seen from his observation where the impulses took unexpectedly long time to travel a neural pathway.

7 0
3 years ago
The process by which a bacteria cell divides into two identical cells is called:
Stels [109]
The answer is A. Binary Fission
5 0
3 years ago
Read 2 more answers
An asynchronous culture is given 3H-thymidine for a period of time, usually about 30 minutes. During the labeling period, 42% of
Sphinxa [80]

Answer:

How long is the G2 phase = 6hours

Explanation:

Cell cycle undergoes various stages  during mitotic cell division.

Normally cells are arrested in the resting phase G0 but as the cell division starts it undergoes G1 the growth phase then it undergoes S phase called the Synthesis phase in which the DNA synthesis occurs. Then it undergoes G2 Phase and is the shortest phase while G1 is the longest phase of the cycle. G2 normally lasts for 3-4 hours so here it may take 2.775 hours as due to presence of Thymidine the synthesis of DNA occur at high level so it contains higher levels of cellular DNA than in the G1 . so it will take  6hours G2 phase to occur.

7 0
3 years ago
Please solve all of question 20
Musya8 [376]

Answer:

use ur textbook

Explanation:

it says use it

6 0
3 years ago
Need help with these questions answer what you can
OlgaM077 [116]

Answer 1:

The mutation shown is point mutation.

A point mutation can be described as a type of mutation in which only a single nucleotide of a sequence is either:

  • changed
  • added
  • deleted

The addition of the single nucleotide will cause the entire open reading frame to be changed. The amino acid sequence will change entirely from the position where the insertion mutation occurs. This is because the code for making amino acids works on a three base pattern. The reading of the three bases will be altered completely by the addition of just a single nucleotide.

Answer 2:

No, the resulting protein will not be altered.

The genetic code occurs in a linear sequence with triplet format. The change in a single base will cause the wrong amino acids to be formed. However, if the different code is common for the same amino acid then there will be no effect on the amino acid being formed.

<em>For example, the code GUA makes the amino acid Valine. If a mutation occurs and the code becomes GUU instead of GUA, then the resulting amino acid formed will also be Valine. Hence, there will be no alternation in the formation of the protein.</em>

Answer 3:

Melanoma cancer is the type of skin cancer which is associated with cancer from sun light. It is mainly caused due to the harmful ultraviolet rays which act as a mutagen.

<em>The mutations might keep coming back because although the growth have been removed, the other skin cells of the body might still have the mutation in them. As a result, growth will be seen again in the skin cells which might occur again and again. </em>

<em />

Explanation:

7 0
3 years ago
Other questions:
  • In photosynthesis, chlorophyll functions in changing
    13·2 answers
  • Study the diagram about the varying pressures of Earth’s Layers. Earth apostrophe s layers. The Crust at depth of 0 kilometers,
    8·2 answers
  • How much of earth’s air is made of Nitrogen?
    14·2 answers
  • Which of these is one of the steps of the hypothetico-deductive method? mistrusting competing theories refute objections to the
    8·1 answer
  • If a disease is continually present in a population in small amounts, it is considered an endemic disease.
    10·1 answer
  • Are endocytosis and exocytosis forms of passive or active transport
    15·1 answer
  • 1. In humans, the starting cell in this process has 46<br> chromosomes.
    12·1 answer
  • Why is it important for soil to contain nitrogen, phosphorus, magnesium, and potassium??
    9·2 answers
  • The genes of the lac operon in E. coli encode enzymes that Multiple choice question. catabolize lactic acid anabolize lactose ca
    10·1 answer
  • quizlet Cyotoxic T (Tc) cells carry this (these) type(s) of receptors: T cell receptor (TCR) CD4 receptor CD8 receptor Both TCR
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!