BIOLOGY MIDDLE SCHOOL

In the 1800s, how did Darwin explain the origin of species?Species originate through geographic separation.
Species originate through adaptation by natural selection.
Species originate through paleontological changes.
Species originate through changes in allele frequencies.

Answers

Answer 1
Answer:

In the 1800s, Darwin explains the origin of species. As species originate through adaptation by natural selection.

Answer: Species originate through adaptation by natural selection

Explanation:

The Origin of species through natural selection is a pioneering scientific effort of the British naturalist Charles Darwin in England. Darwin's theory is that organisms are gradually evolving through what is called "natural selection"

It is a process in which organisms change due to hereditary changes in physical or behavioural traits. Changes that allow the body to better adapt to its surroundings, help it survive and have more offspring.

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Explain how a drought might result in a famine.

Answers


A drought might result in a famine because without water, plants won't be able to grow, so the organisms that eat the plants will starve, as will the organisms that eat the organisms that eat the plants, and the organisms that eat the organisms that eat the organisms that eat the plants, and so on, resulting in a famine.
Its bcause when there is drought , crops or animals will die because of dryness, So therefore as a result of drought , people suffer from hungry because they got no food to eat .

About 500 million years ago, trilobites such as this were common ______________ that once covered much of Indiana. Violent storms often occurred in the same area and the trilobites were covered quickly by sediment, hidden for hundreds of millions of years.A. along riverbanks
B. in the sandy plains
C. in warm, shallow seas
D. throughout the mountains

Answers

c) in warm shallow seas 
this couldve been found on google

PLEASE HELP! What is an angiosperm?A. A small organism made of three levels of tissue
B. A plant that produces seeds with protective covers
C. An ancestor of mollusks, worms, and arthropods
D. An ancestor of cnidarians, coeloms, and sponges

Answers

An angiosperm is a group of plants that produces seeds with protective covers.

What is an angiosperm?

Angiosperm is the group of a plant that produces flowers. It belongs to the group of flowering plants in plant species.

  • Angiosperms make up the largest group of plants on earth.
  • Angiosperms give account for approximately 80% of the plant species on earth.
  • Angiosperm contains separate male and female gametophytes.
  • Pollination is promoted by insects and birds where the pollen grains are attached to their body.
  • Angiosperms contain seeds enclosed in the fruit.
  • Angiosperms remain the major source of food for human beings as well. Because wheat, corn, and other grains are all produced in the flowering plants.

Hence, option B is the right answer.

To learn more about angiosperm, refer:

brainly.com/question/9416370

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a plant that has flowers and produces seeds enclosed within a carpel. The angiosperms are a large group and include herbaceous plants, shrubs, grasses, and most trees.

Answer: B

Which type of evidence is least likely to result in changes to a phylogenetic tree?

Answers

Best source of data for defining phylogenetic relationships of in line of protists that occurs hundreds of millions of years ago is called DNA sequences for ribosomal RNA. Choose the tree that symbolize the fewest evolutionary changes, either in DNA sequence comparisons or morphological characters.
DNA sequencing is likely to result in changes to a phylogenetic tree.

Which of the following BEST describes the hydrosphere A. Bodies of water on the surface of earth, but not the water in the atmosphere or underground.

B. Salt water in the oceans, but not fresh water

C. Water that is underground or mixed into the hemisphere

D. Water in any location on Earth, including the atmosphere, surface, and underground

Answers

The best options that describe hydrosphere in the given options is Water in any location on Earth, including the atmosphere, surface, and underground

  • Hydrosphere can be regarded as one of the main sphere of the earth.

  • Hydrosphere can be regarded as the total amount of water that exist on the surface of the planet, these can include Water in any location on Earth, as well as the atmosphere and surface, and the underground even in the air.

Therefore, Hydrosphere regarded as the total amount of water on the planet

Learn more at : brainly.com/question/1155156?referrer=searchResults
The answer would be D.

How do cells.tissues,organs, and organ systems work together in a multicellular organism?

Answers

First of all, you need to know what cells are.

Cells are the organic building blocks for most organic matter. All cells have cytoplasm,a nucleus, mitochondria, a cell membrane and many other elements,depending on whether they are a plant or animal cell.

Cells live,move, and work together in order to perform a commonfunction.
A Group of cells is called tissue.
Tissues worktogether by combining with other types of tissues in order tocreate an organ, such as your heart.
Different organs function and work together to make a organ system.

Hope this helps! :)

Answer:

In the human body, cells are the basic units of life. Groups of cells working together for a specific function form tissues. Organs are two or more tissues operating together. Even separate organs work together, forming body systems.

Explanation:
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