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Sergeu [11.5K]
1 year ago
10

Explain Directional selectionI need some help please

Biology
1 answer:
Len [333]1 year ago
3 0

Answer:

directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype. 

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How would a scientist have made the distinction between a unicellular and a multicellular organism in the 17th century(1600s), t
Drupady [299]

Using a microscope

Explanation:

A microscope is a scientific device used for magnifying and studying very tiny features.

It was invented by Anton Von Leeuwenhoek in the 17th century.

  • A unicellular organism is an organism made up of a single cell.
  • A multi-cellular organism is made up of several cells.
  • A cell is a very small microscopic structure.
  • It is usually described as the fundamental unit of life.
  • Due to its small size, the naked eyes cannot see it
  • The invention of the microscope opened up the world of cells.
  • Since they have been around for a long time, distinction of cells would have been made possible at those times using a microscope.

learn more:

Microscope brainly.com/question/4065308

#learnwithBrainly

5 0
3 years ago
I NEED HELP PLEASE!!!
Novosadov [1.4K]

Answer

1. The vascular and dermal tissues

2. Protein capsid

Explanation

Dermal tissue present in plants offer the first defense mechanism against physical damage which could be caused by insects and infections.The dermal tissue covers the outside parts of a plant except in woody shrubs and tree which are protected by the bark. Vascular tissues in plants are responsible for the transportation of water and nutrients that are vital in cell repair and growth.Through vascular tissues, the plant obtains nutrients important for the restoration of the damaged cells.

A capsid is the protein shell of a virus.It is composed of protomers which are subunits.Some viruses are enveloped by a capsid coated with a lipid membrane called the viral envelop.The main function of a capsid is to protect the genetic material of a virus while interacting with the host environment.



4 0
3 years ago
Read 2 more answers
the site of atapuerca in northern spain is one of the most important fossil hominin sites in europe. identify what the following
Temka [501]

There have be found some fossils of ancient remains over the years. What the fossils from Atapuerca revealed about the hominins living in Europe at this time is below:

  • The Skull is known to show Interbreeding that took place with neandertals and their relatively healthy population.

  • The Fragment shows that there was a possibility of cannibalism in that area.

It shows that possible cannibalism took place as there were Cutmarks on various hominin bones found at Atapuerca mirror.

The relatively healthy population was found out through the study of the dentition of the Atapuerca hominins by anthropologists. It gave them a view into their diet and overall health.

The interbreeding with the Neandertals was shown through the Nuclear DNA that was gotten from bones and teeth of bones found at Sima de los Huesos

learn more from

brainly.com/question/14012174

7 0
2 years ago
The famous fossil lucy was classified as what species
dmitriy555 [2]
 <span>Australopithecus afarensis</span>
3 0
3 years ago
Which is an example of a scientific theory?
Advocard [28]

Answer:

B I think

Explanation:

If not try D I know it's a if,then statement

5 0
3 years ago
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