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Marianna [84]
3 years ago
13

Six-month-old Eva dropped her teething ring in a fairly rigid way, simply letting go and watching it with interest. This example

demonstrates Piaget's belief that at first, schemes are __________.
A) sensorimotor action patternsB) deliberate and creativeC) preoperational thoughtD) disorganized and random
Biology
1 answer:
bija089 [108]3 years ago
5 0

Option A

This example demonstrates Piaget's belief that at first, schemes are sensorimotor action patterns

<u>Explanation:</u>

When a kid is born, he/she begins growing both bodily and cognitively.  As newborns improve cognitive abilities, they begin reminiscing about their habits and responding to various provocations such as sounds, action, and tremors. This is termed as the sensorimotor stage.

During this stage, babies acquire a perception of the environment by analysis and fault managing their minds and functions. The chief growth through the sensorimotor stage is the recognition that things exist and incidents happen in the context autonomously of one's individual efforts.

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Answer: Option (e)

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Carbon-14 can be used to determine the age of a dinosaur egg. True False
kozerog [31]

Answer:

FALSE

Explanation:

But carbon-14 dating won't work on dinosaur bones. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old. Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old. To determine the ages of these specimens, scientists need an isotope with a very long half-life. Some of the isotopes used for this purpose are uranium-238, uranium-235 and potassium-40, each of which has a half-life of more than a million years.

5 0
4 years ago
Please help me with this question! If its correct ill mark u as the best choice!
melomori [17]
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3 years ago
In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the complementary strand, and a guanine of one st
notka56 [123]

Answer:

adenine pairs with Thymine  and guanine always pairs with cytosine respectively

Explanation:

In DNA nucleotide subunits, there are four nitrogenous bases:

  •    Adenine (A)
  •    Thymine (T)
  •    Cytosine (C)
  •    Guanine (G)

Each of these bases can be divided into two categories: purine bases and pyrimidine bases.

Adenine and guanine are examples of purine bases. This means their structure is a nitrogen-containing six atom ring joined with a nitrogen-containing five atom ring that share two atoms to combine the two rings.

Thymine and cytosine are examples of pyrimidine bases.

Note that  RNA replaces thymine with a different pyrimidine base called uracil (U).

The complementary base pairing rule, Chargaff's rule states that DNA base pairs are always adenine with thymine (A-T) and cytosine with guanine (C-G). A purine always pairs with a pyrimidine and vice versa. However, A doesn't pair with C, despite that being a purine and a pyrimidine.

8 0
4 years ago
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