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
Misha Larkins [42]
1 year ago
14

What was the first eon of the Precambrian?A. PaleozoicB. HadeanC. PhanerozoicD. Archean

Biology
1 answer:
poizon [28]1 year ago
6 0

Hadean is the first eon of precambrian, and took place around 4.6 and 4.0 billion years ago.

You might be interested in
In asexual reproduction the "parent" can be a single...?
Andrei [34K]

answer: the parent can be a single organism

explanation:

it only takes one "parent" single celled organism to asexually reproduce through binary fission

it only takes one "parent" multi celled organism to asexually reproduce through fragmentation or budding

6 0
3 years ago
The process of natural selection
Stella [2.4K]

Answer:

3. shapes the genetic characteristics of a species as a consequence of adaptation

Explanation:

Natural selection is a process characterized by how plants and animals that are able to adapt to changes in their environment are able to survive and reproduce while those that are unable to adapt do not survive.

In natural selection, those variations in the genotype which increases an organism’s chances of survival and procreation are preserved and multiplied from generation to generation at the expense of less advantageous variations.

Natural selection is a way of enhancing the preservation of a group of organisms that are best adjusted to the physical and biological conditions of their environment and may also result in their improvement in some cases.

6 0
4 years ago
A student plans on interviewing 15 principals in neighboring high schools. The student plans to collect data about the personal
Sonja [21]

The question is correct but the option is incorrect. The correct option is as follows:

a) Expedited Review b) Not Human Subjects c) Convened Review d) Exempt Review e) Full board review.

Answer:

Full board review.

Explanation:

IRB ( Institutional Review Board) is mainly responsible for the protection and maintains the ethics that are involved in the research related to humans and other animals.

The full board review requires  more time that n the other type of review. This review is mainly done in the cases where the participants can get misleading information. This review includes the research that are based on to involve the judgement and involves less risk. The information given in the question explain the full board type review.

Thus, the correct answer is full board review.

8 0
4 years ago
Read 2 more answers
The chemical formula of a compound describes the elements the compound contains and the
Mumz [18]

Answer:

D ) ratio of neutrons to protons in each element.

3 0
3 years ago
Theory of Plate Tectonics
masha68 [24]

Answer:

northwest

Explanation:

the largest plate, the Pacific Plate is moving north west relative to the plate that holds North America. i also did this recently<3

4 0
3 years ago
Other questions:
  • When humans eat sugar, the sugar is broken down and released as?
    12·2 answers
  • Why is it an investment for the cell to use two ATP at the beginning of glycolysis?
    12·1 answer
  • What are two ways in which tears help to prevent microbial colonization?
    10·1 answer
  • The heart is about the size and shape of your ...
    9·1 answer
  • You are living next to a field that is burning. The smoke is blowing towards your neighborhood. You are outside and there is so
    11·1 answer
  • Need help Plz!!!!
    5·1 answer
  • Any change in the Relative Frequency of alleles in a population is:
    14·1 answer
  • If the DNA molecule is only composed of four possible nitrogen bases, how can thousands of different proteins be formed from suc
    10·1 answer
  • When the gene encoding a certain cytoskeleton protein is deleted, the resulting mutant cells round up and do not form their norm
    15·1 answer
  • Which is the correct order of events for fossil formation?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!