The fossil record of birds is incomplete because bird skeletons are

1 answer:

7 0

Bird skeletons are very delicate, and therefore, difficult to be preserved. The bones of the birds are soft. The small animals are very prone to physicochemical as well as biological decay. This is why the fossil record of bird is incomplete and well-preserved fossils of birds are rare to find, except at a few unusual sites.

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Which of the following statements about natural selection is true?A. Natural selection is a process whereby genes are selected r

AlekseyPX

Answer:

C. Natural selection favors individuals that reproduce more than others.

Explanation:

Genetic variations present in the population are acted upon by natural selection. The organisms that have the adaptive traits which in turn make them able to survive and reproduce more than the other individuals are favored by natural selection.

Over generations, natural selection leads to the evolution of a new population with an increased frequency of the gene responsible for the selected adaptive trait.

For example, the bacteria with antibiotic resistance were favored by natural selection as they can survive and produce more progeny in the presence of antibiotics than the bacteria lacking the gene for antibiotic resistance.

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3 years ago

True or false/ kingdom fungi and kingdom plantae both contain autotrophs

Arada [10]

Answer:

False

Explanation:

Autotrophic organisms are capable of synthesizing their own food and nutrition by harnessing sunlight and water.
Along with the entire kingdom Plantae and the following organisms are autotrophs:

Algae
Cyanobacteria
Seaweed
Phytoplankton

Fungi are heterotrophs, particularly of saprophytic nature. This means that they release enzymes on organic matter. These enzymes digest the organic matter into nutrients that the fungus can then utilize.

8 0

4 years ago

Why is the plasma membrane selective

rjkz [21]

The plasma membrane is selective because it has to be able to determine what is vital to the body or what is dangerous and unable to be received. Specifically the plasma membrane is a part of the cell that is contained of lipids and proteins. It is the regulation center of the cell and it's operation is functional to a living organism.

Please vote my answer brainliest. thanks!

8 0

4 years ago

Describe the advantage of an excretory system for terrestrial animals

yaroslaw [1]

The excretory system allows animals to remove metabolic waste their bodies. Many of these substances are potentially toxic. in Mammals nitrogenous toxins like urea are expelled through liquid urine while in reptiles and birds the nitrogenous compounds are expelled as a solid. This allows birds and reptiles to use less water in the processes of metabolism.

7 0

4 years ago

Which of the following statements about the germ layers is NOT correct?

ahrayia [7]

Answer:

The endoderm gives rise to the nervous system.

Explanation:

Gastrulation is the process that occurs during the third week of embryonic development and includes transformation of embryonic disc with epiblast and hypoblast into a three layered embryonic disc made up of ectoderm, mesoderm and endoderm. These are the three primary germ layers and give rise to various tissues and body organs.

Endoderm of the embryo give rise to epithelial lining of gastrointestinal tract (except the buccal cavity), respiratory tracts and other organs such as gallbladder, liver,etc. Mesoderm forms connective tissues such as bones as well as muscles and peritoneum. All the tissues of nervous system and epidermis of skin are derived from ectoderm.

7 0

3 years ago