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cricket20 [7]
3 years ago
11

How are stars classified?

Biology
2 answers:
DiKsa [7]3 years ago
5 0
Mostly in summary by their spectra! hope this helped
RUDIKE [14]3 years ago
3 0

Answer:

Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.

Explanation:

O and B stars are uncommon but very bright. M stars are more common but dim.

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Long necks make it easier for giraffes to reach leaves high on trees, while also making them better fighters in "neck wrestling"
Kaylis [27]

Answer:

c. Directional selection

Explanation:

Directional selection is a type of natural selection that occurs when selective pressure favors one extreme phenotype over any other phenotype existing in a population. Only one extreme phenotype is favored over time.

A good example of directional selection is the natural selection that occurs in giraffes, where alleles for long necks were favored against alleles for short necks as a result of selection pressure among the different phenotypes. Over time, giraffes having long necks dominated the population as the distribution of length of neck shifts towards the phenotype for long necks.

5 0
3 years ago
A teacher says she has identified an organism with these characteristics: eukaryotic, multicellular, autotrophic, and a cell wal
DiKsa [7]
Let's break down each of the words to find out what they mean.
Eukaryotic: This basically means that the organism in question has a nucleus and other membrane-bound organelles. This rules out bacteria and archaea.
Multicellular: The organism must be made up of one or more cells, so that rules out protists.   
Autotrophic: This means that the organism can make energy from inorganic substances via a light source or chemical energy. Finally, this rules out animals and fungi.
Cell wall: This also proves that the organism is a plant. Plants are the only organisms that have a cell wall made of cellulose; fungi have one, but they are made of chitin and glucans.

So, your answer is that the kingdom of the organism of a plant. 
4 0
3 years ago
Read 2 more answers
What is a pheromone?
Marianna [84]

a chemical substance produced and released into the environment by an animal, especially a mammal or an insect, affecting the behavior or physiology of others of its species.
5 0
3 years ago
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The reactions of photosynthesis occur in the ______________ of plant cells.
grigory [225]

Photosynthesis occurs in the chloroplast, an organelle specific to plant cells.
4 0
3 years ago
Read 2 more answers
How do brain cells "talk" to each other?
Lostsunrise [7]
Neurons and neurotransmitters didn’t see first answer please make Brainlyist have a good day
6 0
3 years ago
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