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NeX [460]
3 years ago
7

How many species of sponges are found in the world?

Biology
2 answers:
Serggg [28]3 years ago
5 0
50000 i think but not sure
SVETLANKA909090 [29]3 years ago
3 0
5000 species are found
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Which problem arises when the same crop is grown year after year in the same field?
miskamm [114]

Answer:

The crop has an increasing need for fertilizers, herbicides, and pesticides.

Explanation:

I just took the test, lol.

6 0
3 years ago
Starchy grain is dominant over sugary corn. If, in a cross between these types, 58 of the progeny are sugary, how many of the pr
DaniilM [7]

Let us solve first the phenotype of this problem.

Starchy grain = AA (dominant)

Sugary Corn = aa (recessive)

AA x aa = AaAa ; AaAa

<span>     A    A</span>

<span>a  Aa   Aa</span>

<span>a  Aa   Aa</span>

The result of the cross is that the progeny will become heterozygous.

<span>If there is 58 progeny sugary, there will also be 58 starchy. It is 50%.</span>

5 0
3 years ago
Can we create effective vaccines or immunizations for lab made viruses? Or is it not possible because of the synthetic/man-made
Rashid [163]

Yes, it is possible to develop effective vaccines for any type of viruses. Genetically engineered viruses exhibit similar characteristics to natural viruses.

<h3>What is a virus?</h3>

A virus is a genetically independent entity that needs a suitable host to reproduce its genetic material (either DNA or RNA).

A genetically engineered virus is a virus whose genetic material has been modified using genetic engineering techniques.

Vaccines can be developed for removing any type of viruses because they take advantage of the intrinsic properties of the immune system (i.e., antigen recognition), independently of its origin.

Learn more about viruses here:

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6 0
2 years ago
Which of the following statements about plankton or nekton is NOT correct?
Oduvanchick [21]

Answer:

C. All plankton are closely related to plants.

Explanation:

Plankton are organisms found in water that exist in a drifting state. They are too small or weak to swim on their own, so they let the current or tide carry them. They are usually microscopic but include larger species as well, such as some crustaceans and jellyfish.

Phytoplankton are autothrophic plankton. This means that they produce their own food. They are primary producers and closely related to plants.

Zooplankton are heterotrophic plankton, which means that they feed on other organisms. They are animals and aren't closely related to plants.

Nekton are organisms found in water that swim actively.

Based on this information, we can conclude that statement C is the only incorrect statement.

6 0
3 years ago
Which process is responsible for the greatest loss of energy from Earth’s surface into space on a clear night?
lyudmila [28]
Radiation is responsible for the greatest loss of energy. 
3 0
3 years ago
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