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Studentka2010 [4]
4 years ago
15

Which substance do all living things require to survive

Biology
1 answer:
nalin [4]4 years ago
8 0

Oxygen and Carbon dioxide


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These variations are caused by a(n) __________ in a gene
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Modification in a gene
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3 years ago
Laura and Celia are identical twins. They were adopted at birth by different families and raised in different environments. Howe
timofeeve [1]

Answer:genetic make up was not affected

Explanation:outside factors can not alter someone's genetic traits;as twins no matter where they are and what environment they are in they will still possess similar genes.

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This is more of a personal question then school one.<br><br> What is 5 biotic factors of a snake.
sattari [20]
EmailSave<span>Jupiterimages/Photos.com/Getty ImagesSnakes in popular myth and representation have often been a source of intrigue, fear and demonization. These portrayals have made it more difficult to perceive of such a creature as imparting any benefits on its surroundings. This is most assuredly not the case, as snakes serve valuable roles in the great majority of ecosystems in which they are found. There are instances, however, where their sudden introduction has proven problematic.<span><span>IdentificationThe term biotic factors refers to the way in which an organism -- such as a snake -- interacts with its environment or ecosystem. In particular, it pertains to the way the presence, activities and feeding patterns of that animal affect other living things within that environment. Biotic factors of snakes involve how they impact the necessary balances that make their ecosystem function, especially with regard to a snake's role as both predator and prey.</span><span>PredatorsAll species of snakes are carnivorous or feed on meat. While different species have various methods for killing their prey (constriction or poison), snakes, in general, hunt a variety of creatures. These include, but are not limited to, rodents, insects, birds, small deer, as well as fellow reptile species. In human eyes, this often characterizes snakes as a valuable form of pest control. Snakes' prolific presence in many different habitats -- water, forests, mountains, deserts and other -- make them formidable predatory forces in regions the world over.</span><span>PreyWhile the conventional image of snakes usually portrays them as dangerous predators, the fact is that snakes themselves are prey to many animals. They are not always on top of the food chain. This is especially the case for smaller snakes that are not venomous nor big enough to ward off a large attacker. Some species of birds eat snakes, as do coyotes, foxes and mongoose. When humans are present, snakes are used for their skins and, on occasion, for food. This demonstrates snakes versatile role in the ecosystems as both hunter and hunted.</span><span>Florida Case StudyWhile snakes are natural components of many ecosystems, there is the possibility that the introduction of a certain specie to a foreign environment can be dangerous. This is reflected in the early 21st century 'invasion' of the state of Florida by the imported Burmese python. While many snakes already existed in related areas of the state, the new python found no natural predators and, in fact, found itself hunting the former head of the food chain, the alligator. Scientists are still pursuing methods for monitoring the Burmese python and for stemming an expansion of the species throughout the state ecosystem.</span></span></span>
8 0
4 years ago
Collection of glands that secrete hormones into the blood which regulate growth, development, and homeostasis.
Kobotan [32]
The answer is the endocrine system.

The brainest answer would be apprenticed.
6 0
3 years ago
Place the following events in the correct order as they occur on the lagging strand:1. Helix unwinding2. DNA polymerase III buil
Murrr4er [49]

Answer:

1, 5, 2, 3, 4

Explanation:

There are several enzymes involved in DNA replication and the step by step process of replication along with enzymes involved is as follows  

a) Helicase is the first enzyme to act and it has a very important role in replication. Helicase unwinds the double helix of DNA

b) Single strands binding proteins  prevent reattachment of  DNA helix

c) Topoisomerase is responsible for relieving or inducing supercoils

d) The primase then lay the starting blocks made from RNA

e) DNA polymerase enzyme III lay the DNA from 5 prime to 3 prime.  

f) DNA polymerase enzyme I then do half ladder replication

g)   DNA Ligase links all the fragments.  

Hence, the correct sequence is 1, 5, 2, 3, 4

8 0
3 years ago
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