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faust18 [17]
3 years ago
7

Which statements describe long-term environmental changes? Check all that apply

Biology
1 answer:
scoray [572]3 years ago
7 0

Answer:

They occur in thousands of years or within billions of years

They affect populations and species more slowly than short-term changes

They can affect the DNA of living things over time.​

Explanation:

Environmental changes occur when natural phenomenon and activities if humans brings about a disturbance of the natural environment thereby causing a change or impact on the ecosystem of the environment.  Environmental changes could be short-term or long-term. Short-term changes occur within minutes, days, weeks or more, and usually has a drastic impact on a population. Short-term change often do not allow organism in an environment to adapt well, and could lead to migrration or extinction of such species of organisms.

Long-term environmental change, on the other hand takes thousands or more years to occur. They occur gradually that their impact on organisms is barely noticeable. It gives enough time for the species of organisms in the environment to adapt. It could bring about a change in the DNA of organisms over time. An example of long-term environmental change is global warming resulting from climate change.

Therefore, the statements that describe long-term environmental changes are:

They occur in thousands of years or within billions of years

They affect populations and species more slowly than short-term changes

They can affect the DNA of living things over time.​

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You are given a 1 liter bacterial culture in exponential stage of growth. The generation time of the bacteria is known to be 30
nydimaria [60]

Answer:

Option-A

Explanation:

A bacteria divides by binary fission which divides a parent bacteria into the two daughter cells and generation time refers to the average time difference between two consecutive generations.

The bacterial cell grows by the exponential function that is by 2^{number of generation} x initial population of bacteria.

In the given question,

<u>Initial population</u>

the initial population of bacteria - 2x 10³ per ml

So per liter, the bacterial population will be 2 x 10 ⁶

<u>Generation time</u>

1 generation time of bacteria is 30 min.

so 5 hours will have- <u> </u>\frac{300}{30}= 10 generations

<u>New bacterial population</u>

Using formula<u>  </u>2^{number of generation} x initial population of bacteria

2^{10} x (2 x 10⁶)

= 1048 x (2 x 10⁶)

2048 x 10⁶

Thus, Option-A is the correct answer.

4 0
3 years ago
How are plants and animals features affected by the tropical rainforest
Eva8 [605]

Answer:

rapid climate

Explanation:

rapid climate could affect the rainforest by increasing the temperature and driving animals far away

8 0
3 years ago
Which of the following is a characteristic of all arthropods?
sasho [114]
Arthropods are a group of organisms which possess an exoskeleton, <span>jointed appendages, and segmented bodies. This group mostly includes insects, arachnids, and crustaceans. Therefore, the answer to the question above would be option C: jointed appendages. Hope this helps.</span>
8 0
3 years ago
Read 2 more answers
Select the correct answer.
Oduvanchick [21]
The answer is C.

The man’s genotype must be AB. The woman’s genotype can be either BB or BO as both correspond to a blood type (which is a phenotype) of B.

Each parent passes on one allele. The man can contribute A or B and the woman can contribute B or O.

The possible genotype combinations are therefore AB, AO, BB, and BO. These correspond to the phenotypes AB, A, B, and B.
4 0
3 years ago
Your aunt grows sprouts hydroponically. from where do her plants get nutrients?
larisa [96]
Hydroponics way of growing, is way of farming, in which plants are grown in nutrient rich water. So, in Hydroponic growing of sprouts, sprouts get their nutrients from the nutrients supply like liquid fertilizers which are mixed with the water. It is one of the advantage of hydroponic means of growing because, unlike in soil system, the plants root does not have to work hard to get nutrient from underground. The easy availability of nutrients and other condition like water, pH level etc makes plants grow faster are fuller.

Also, advancement of technology have made it possible to prepare built-in hybrid hydroponic system which have multiple ways of delivering nutrient to specific plants. 
8 0
3 years ago
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