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timurjin [86]
3 years ago
7

Where are the cells located that make up the SA node

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

Answer:

in the wall of the right atrium of the heart.

Explanation:

The sinoatrial node (SA), consisting of spindle-shaped cells, initiates the electrical activity of the heart. From its location in the right atrium in proximity to the superior vena cava, the electrical activity spreads to the atria, whose cells are larger than those of the SA.

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What happened to the greenish warbler birds as they migrated from the southern portion of their range up around the Tibetan Plat
kozerog [31]

Answer:

The correct answer is - option A. They evolved separately as they moved north and became two separate species

Explanation:

Greenish warbler is a leaf warbler present in many regions in the world and shows migration in winters in the Indian region. The main region of the migration is Tibetan Plateau.

They migrated from the southern part of these birds range and moved north and evolved separately from the main species and become two distinct species due to their geolocation and environment change.

3 0
3 years ago
in eukaryotes, genetic material is packaged in the nucleus. which group accurately lists the levels of the packaging in order of
vredina [299]

The DNA molecules are often fitted into the nucleus through packaging into a compressed and compact structure. The group that accurately lists the levels of the packaging in order of increasing size are nucleotide, DNA duplex, nucleosome, chromatin, chromosome.

Chromosomal DNA is often packaged into a nuclei that is microscopic in nature through the help of histones.

In the DNA packaging inside the nucleus, the cells folds or wrap their DNA strands around scaffolding proteins to form a coiled condensed structure. The structure is known as chromatin.

The full question is below

Which one of the following MOST accurately lists the components in order of increasing size?

A. chromosome, chromatin, nucleosome, DNA duplex, nucleotide

B. nucleotide, DNA duplex, nucleosome, chromatin, chromosome

C. nucleotide, DNA duplex, chromatin, nucleosome, chromosome

D. nucleotide, nucleosome, DNA duplex, chromatin, chromosome

E. chromosome, nucleosome, chromatin, DNA duplex, nucleotide

Learn more from

brainly.com/question/10194046

8 0
3 years ago
Plz help I will mark you brainlist plz ​
ladessa [460]

Answer:

1. Acid

2.  Acid

3. Acid

4. Base

5. Acid

6. Bases

7. acid

8. base

9. acid ( could be both)  

10. acid

*Anybody correct me if I'm wrong*

Explanation:

7 0
3 years ago
What characteristics of muscles help you determine the direction of the movement?
Flura [38]
The relationship between the bone and muscle
4 0
3 years ago
Read 2 more answers
PLEASE HELP Why are haploid gametes essential for sexual reproduction
harina [27]
It increases genetic diversity by having two.
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3 years ago
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