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wlad13 [49]
3 years ago
6

People and most other animals wake up and go to sleep on a regular basis, at about the same time every 24 hours. what causes thi

s 24-hour cycle?
Biology
1 answer:
ANTONII [103]3 years ago
5 0
The light-dark cycle caused by the rising and setting of the sun is responsible for what are called circadian rhythms. These are biological processes that show a cycle of around 24 hours, the time between consecutive rising of the sun. Experiments have shown that without the external cue of sunlight, the circadian rhythms of organisms tend to break down. These can be reset by being re-exposed to these cues. Jet lag is due in part to a re-setting of the circadian rhythm, as you travel to a different time zone, your body has to become used to a different timing of night and day. <span>  </span>
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Plants do not have a digestive system like us.why do they not need a digestive system
umka2103 [35]
All they need for their living is carbondioxide in air ,water and some nutrients .so basically their roots are responsible for collection of water which contains life giving nutrients .but we take food as a solid substance which hasto be converted into energy
6 0
3 years ago
A group of students are reviewing information about the skeletal development in children. The students demonstrate understanding
stellarik [79]

Answer:

25 years

Explanation:

Ossification is the process of bone tissue formation. Osteoblasts are responsible for the process of ossification. It begins when the fetus is three months old and goes on till 25 years of age. Upper limbs get ossified first, followed by lower limbs, sternum and vertebrae.

There are two types of ossification processes. When bone is directly developed using the primitive connective tissue (mesenchyme) it is called as  intramembranous ossification, while in endochondral ossification cartilage is used as a precursor.

7 0
3 years ago
Dna Aca ata tag ctt ttg att
Nostrana [21]

Answer:

UGU UAU AUC GAA AAC UAA

Explanation:

Hello There!

These are the transcription pairings

Adenine (A) to Uracil (U)

Thymine (T) to Adenine (A)

Cytosine (C) to Guanine (G)

Guanine (G) to Cytosine (C)

So given the DNA strand ACA ATA TAG CTT TTG ATT

We pair each nucleotide with its matching nucleotide (parings are provided above)

A to U

C to G

A to U

A to U

T to A

A to U

T to A

A to U

T to A

A to U

G to C

C to G

T to A

T to A

T to A

T to A

G to C

A to U

T to A

T to A

The finished mRNA strand looks like this

UGU UAU AUC GAA AAC UAA

6 0
3 years ago
Wildfires in Crater Lake burned approximately 33,000 acres in 2011, leaving 25 square miles of charred
aleksandr82 [10.1K]

Answer:

Secondary succession

Explanation:

3 0
3 years ago
What is cpr what should the rate and oxygen?
dimaraw [331]
CPR is short for cardiopulmonary resuscitation. It’s a life saving medical procedure which is given to someone who is in cardiac arrest. It helps to pump blood around the person's body when their heart can’t. To carry out CPR a person presses up and down on the casualty’s chest (chest compressions<span>) and gives them a series of rescue breaths to help save their life when they are in cardiac arrest. At 6 min, CPR was started with an automated chest compressor at a rate<span> of 200-240/min. 


more information, https://www.ncbi.nlm.nih.gov/pubmed/19520479
</span></span>
6 0
3 years ago
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