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Kobotan [32]
3 years ago
6

T or F... The Earth's climate changed naturally BEFORE humans existed. * True False

Biology
2 answers:
pogonyaev3 years ago
8 0

Answer:

True

Explanation:

In Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes not related to human activity. Most often, global climate has changed because of variations in sunlight. Tiny wobbles in Earth’s orbit altered when and where sunlight falls on Earth’s surface.

DENIUS [597]3 years ago
6 0

Answer:

Explanation:

true

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What do you notice is the main difference between the structure of the connective tissues and the structure of the epithelium? m
FinnZ [79.3K]

The connective tissues and the epithelial tissue differ in their structure in the way their cells are organized. The cell of the epithelial tissue are organized in a closed-packed pattern, while the cells of connective tissue are organized in spread out pattern. Moreover, the connective tissues has blood vessels, but the epithelial tissue does not.

The epithelial tissues serve the purpose of protection. Protective layering is formed by the epithelial tissues in the body. The connective tissue such as bone provides support to the body. The blood vessel connectivity helps in the transfer of the newly formed blood cells.

The appearance of a person is determined by the tissues and other components. The skeletal determines the basic structure of the person. The epithelial tissues give more specificity to the figure of a person. The fats helps in determining the shape of the eyes and cheeks.

The fat in the cheeks is supposed to help the new born infants to suckle and chew. Moreover, it provides padding to the temporalis muscle while chewing. The fat behind the eyes helps in preventing damage to the eyes which may be caused if they rub with the bones of the skull.

It will be hard to open and close one's mouth if the temporalis muscle of a person is damaged. This will make forming words properly difficult. The damage to orbicularis oculi will make the blinking extremely difficult. The facial expressions will be distorted in such cases. The damage to the orbicularis oris will make the movement of the mouth difficult, which will cause poor articulation.


5 0
3 years ago
A certain restriction enzyme digest results in DNA fragments of the following sizes: 4,000 bp, 2,500 bp, 2,000 bp, and 400 bp. S
Paladinen [302]

Answer:

Smaller the size of the DNA fragment, farther it moves during electrophoresis. The sketch of the position of the fragments has been drawn in the figure below.

Explanation:

As we know DNA is a negatively charged molecule. So during electrophoresis the fragments move towards the positive electrode because opposite charges attract each other.

Different fragment move different distances according to their size during the electrophoresis. Smallest segment travels the largest distance in the gel medium while the largest one travels least distance.

In the question there are four DNA fragments with base pairs 4000, 2500, 2000 and 400 so the smallest segment with 400bp will be farthest from the starting point and the largest fragment with 4000bp will travel least distance in the gel medium. Their respective positions are shown in the figure below. The starting point is near the negative electrode.

8 0
3 years ago
Scientists hypothesize that vesicles evolved to become cells due to the presence of self-replicating molecules, such as DNA and
S_A_V [24]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Below are the choices that can be found from other sources:

<span>A.) DNA can store genetic information and most likely appeared before RNA.
 
B.) DNA is more linear than RNA and most likely appeared before RNA.
 
C.) RNA can catalyze biological reactions and most likely appeared before DNA.
 
D.) RNA is more stable than DNA and most likely appeared before DNA.
</span>
i think the answer is A. 
8 0
3 years ago
Need help please help
Anna35 [415]
The answer is step 6!
3 0
3 years ago
_____ in carbon dioxide in your red blood cells, which causes _____ in ph, causes your breathing to speed up. see concept 42.6 (
Sphinxa [80]

 Increase in carbon dioxide in your red blood cells which causes a drop in PH causes your breathing to speed up. If you hold your breath, rising carbon dioxide blood gas changes first leading to the urge to breathe. Carbon dioxide enters blood at the abdominal organs, hindlimbs, capillaries of the head.

4 0
3 years ago
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