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nordsb [41]
3 years ago
10

A birds newly grown feathers are called?

Biology
1 answer:
11Alexandr11 [23.1K]3 years ago
5 0
Vaned feathers maybe?

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Han’s younger sister is riding her tricycle in a straight line. Her speed is 2.5 m/s. After 5 seconds, she comes to a stop. What
Ainat [17]

-0.5m/s^2

Explanation:

the answer is negative this only show direction that is acceleration is a vector quantity

6 0
3 years ago
If the genetically transformed cells have acquired the ability to live in the presence of the antibiotic ampicillin, then what m
V125BC [204]

Answer:

The plasmid must express a gene for ampicillin resistance (the protein product of  the <em>bla</em> gene codes for beta-lactamase, the protein that breaks down ampicillin). The colonies on the ampicillin plate are antibiotic resistant. This means that they have taken up the transformed plasmids expressing both the <em>bla</em> gene and the GFP gene.

Explanation:

The transformation involved the genetic modification of a plasmid to incorporate the gene encoding the green fluorescent protein (GFP) from jelly fish. GFP makes cells glow under UV light.

In genetic engineering, scientists use antibiotic resistance as markers to indicate cells that have been transformed. By incorporating an antibiotic resistance gene such as <em>bla</em> into the vector (plasmid) and then growing the cells in antibiotic media, scientists determine which colonies have taken up the plasmid. Therefore, if the cells survive, this means that they contain the plasmid with antibiotic resistance gene as well as the GFP gene.

5 0
3 years ago
The _____ sends out an electrical impulse that regulates the heartbeat.
olga nikolaevna [1]

Answer: The SA node

Answer choices are:

<span>A.      </span>The AV node

<span>B.      </span>The SA node

<span>C.      </span>The purkinje fibers

<span>D.     </span>The AV bundle

The SA node<span> is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code.  </span>

3 0
3 years ago
Read 2 more answers
How does an impulse travel from one neuron to another?
Mazyrski [523]

Answer:

When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron.

Explanation:

The binding allows the nerve impulse to travel through the receiving neuron.

8 0
3 years ago
Which of the following are possible results of mutated genes?
Nimfa-mama [501]

Answer:

harmful effect and no effect

Explanation:

No effect: most mutated genes destroy themselves before it gets to far

Harmful effect: an example of harmful effects would be down-syndrome (where you have 3 21-chromosomes and you are only supposed to have 2)

6 0
2 years ago
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