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lana [24]
3 years ago
5

By age 6, the average child has a vocabulary of around ___________ words

Biology
1 answer:
cestrela7 [59]3 years ago
5 0
By age of 6, the average child has a vocabulary of around 14,000 words. Vocabulary development can be relatively variable among children of the same ages. Children typically speak their first word somewhere around 12 months. At 18 months, they may use around 50 words or lower and there is an increase in the number of words with age. 
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AMP-PNP is the abbreviation for a structural analogue of ATP in which the second and third phosphate groups are linked by an NH
Inessa [10]

Answer:

Explanation:

a.

Actin and myosin, two contractile proteins, make up myofibrils. ATPase activity is present in the myosin head. Troponin tropomyosin complex is displaced by calcium ions, exposing myosin's entire surrounding binding site on actin. Myosin heads execute the power stroke, and detachment of the head is needed for the second cycle. Myosin head detachment is aided by ATP binding & hydrolysis. Since the solution contains AMP-PNP instead of ATP, myosin heads are unable to hydrolyze and detach from myosin-binding sites on actin, thereby preventing contraction.

b.

The active ATPase correlated with both the dynein arms is found in cilia and flagella. Dynein is a motion motor protein family that walks around microtubules. The core of cilia is made up of microtubule bundles linked to the motor protein dynein. In the presence of AMP-PNP, the net reaction will be to stop the ciliary movement by inhibiting dynein motor proteins.

c.

Kinesins and Dyneins, two groups of motion motor proteins with ATPase activity, are involved in axonal transportation. All the motion motor proteins use energy from ATP hydrolysis to transfer secretory vesicles through microtubules. Since the inclusion of AMP-PNP does not supply electricity, vesicular transport does not occur.

7 0
3 years ago
ILL GIVE BRAINLIEST!!!
Semenov [28]

Answer:

in my opinion i think its B because it makes more sence.

3 0
3 years ago
Read 2 more answers
A functional group on an amino acid that is polar and can become negatively charged: ___________
luda_lava [24]

Answer:

Carboxylic acid.

Explanation:

Amino acids are made up of the amine group, carboxyl group, hydrogen and R hydrophobic chain. Amino acids are the monomers of the protein and they are coded by the particular codons.

Amino acids contains both the amino group and the carboxyl group. The carboxylic group is a polar group and becomes negative charged when the pH of the solution is greater than the pKa value of the amino acids.

Thus, the answer is carboxylic acid.

7 0
3 years ago
How did eukaryotic cells evolve prokaryotic cells?
Lera25 [3.4K]

Answer:

The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes (endosymbiosis) is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.

Explanation:

Both mitochondria and chloroplasts are similar to bacteria in size, and like bacteria, they reproduce by dividing in two.

3 0
3 years ago
A state in the United States wanted some funds for protecting wildlife. However, the wildfire conservation and restoration progr
SpyIntel [72]
Wildlife action plan is the answer
3 0
3 years ago
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