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alisha [4.7K]
3 years ago
7

What does archaebacteria mean?

Biology
2 answers:
laiz [17]3 years ago
6 0

Answer:

A. Ancient bacteria

Explanation:

From the salt of the earth, researchers have isolated and revived a Bacillus strain, which they believe is >250 million years old. If correct, Russell Vreeland and his colleagues from West Chester University, Pennsylvania, have discovered the oldest living organism in the world.

Delvig [45]3 years ago
3 0

Answer:

A. Ancient bacteria

Explanation:

Archae bacteria means ancient bacteria. So, option (A) is the correct answer.

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Why blood from the small intestines goes to the liver before it goes to other organs
Anvisha [2.4K]

Answer:

Blood goes from small intestine to the liver in order to remove toxic substances and store the nutrients. After that, the blood is sent to all parts of the body.

Explanation:

Liver is an important organ of the body which is responsible for the purification of blood coming from the small intestine and then it send to all organs of the body. This blood contains nutrients which is absorbed in the small intestines and some toxic substances which is purify by liver.

7 0
3 years ago
Scientists interested in knowing the best way to restore an area after a temporary road was built through it completed a study c
Drupady [299]

Answer:

This study was focused on an Ecosystem level, as it involved soil properties and above-ground vegetation interacting with mentioned soil physic properties.

Explanation:

Ecological studies can be performed at different hierarchy levels:

-         <u>Organism</u>: This is an individual physiologically independent from other individuals. At this level, it must be understood <em>how an organism survives</em> under certain changing <em>physic and chemistry conditions</em>, and how it <em>behaves</em> to reproduce, avoid predators, and find food.

-         <u>Population</u>: Groups of individuals from the same species, with similar characteristics, capable of crossing, leaving offspring that live in the same habitat at the same time. At this level, it is interesting to know the <em>size of the population required to leave fertile offspring</em> that ensure the population will <em>survive over time</em>. It is also interesting to know <em>genetic variability </em>that allows <em>evolutive adaptation </em>to environmental changes.

-         <u>Community</u>: Relationship or interaction between different species groups that live in the same habitat and at the same time. At this level, it is interesting to study <em>inter-specific interactions</em> that could cause <em>changes in the populations´ size</em>. These could be the cases of competition, predation, parasitism, mutualism, and etcetera.

-         <u>Ecosystem</u>: Basic interaction unit between population and environment that turn in complex relations existing between living and non-living elements in a given area. In the example, interactions between recovering vegetation and soil properties, as non-living elements.  

5 0
3 years ago
If the herbivore population in an ecosystem increased what would most likely happen to the size of the carnivore population
Naily [24]

Answer:

the carnivore population(s) would increase because their amount of food would increase also

Explanation:

7 0
4 years ago
Read 2 more answers
Imagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled
Tatiana [17]

Answer:

<h2>D)  610:190, round seeds:wrinkled seeds</h2>

Explanation:

Let round seed as R and wrinkled seed as r.

So the round is dominant (R) over wrinkled(r).

Hence , round is dominant and wrinkled is recessive rr.

Now cross between pure round (RR) and pure wrinkled (rr).

RR× rr

F1 offspring are:  Rr ( all)

Now cross between F1 offspring;

Rr × Rr

F2 are= RR, Rr, Rr and rr

RR and Rr = round

rr= wrinkled.

round to wrinkle ratio is= 3:1

So,  610:190; round seeds:wrinkled seeds  is the  expected result in the F2 progeny.

3 0
3 years ago
The purpose of the ______ system is to prevent foreign substances from entering the body and to attack foreign substances that a
kaheart [24]
A. Immune because this is what the immune systems job is
3 0
3 years ago
Read 2 more answers
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