Evolution is: A) A change in the composition of a population from one generation to the next.
B) A phenomenon that must be inferred from evidence, because it cannot be observed directly.
C) The transformation of an individual to better fit its environment.
D) Driven by the use or disuse of a body part, as when a finch uses its beak to crack open seeds.

Answers

Answer 1

Answer: a, b, and c are all correct.

take for example finches off of the galapagos islands. they vary from island to island, yet are still the same bird. on one island they have bigger, more durable and stronger beaks, because that island has many nuts to crack open and eat. on another island, they have thin ling beaks, ideal for pecking at insects in the grass on tree bark. evolution is literally survival of the ifttest, where those equipped best will live and those without means to fight for life will die off, leaving those most capable of reproduction and passing down genes.

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Are enzymes in saliva a example of a structural adaption or physiological?
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Which of these could NOT be a measurement of speed? A. 10 m/s B. 35 mi/s C. 5 km/h north D. 1,000,000 mm/h

Answers

Answer:

C. 5 km/h north

Explanation:

Speed is the rate at which an object changes position, and it is measured in meters per square seconds. The formula or equation used in calculating speed is distance divided by time. The distance traveled is always in meters and time is always in seconds to get the speed it will be one meter per second. Speed doesn’t specify the direction at which an object will travel. Hence the answer is C. 5Km/hr north

Which of the following are not true of exocytosis? A.it occurs at the cell membrane B.it does not require energy C.it needs a vesicle to move the matter D.it expells matter out of the cell

Answers

The statement which is not true is it needs a vesicle to move the matter. Thus, option C is correct.

What is cell?

Cell is defined as the base of life as it is the structural as well as functional unit of life. Cell is made up of pre existing cells and the cell contain various cell organelles such as mitochondria, endoplasmic reticulum, ribosomes, golgi appratus, nucleus, and cytoplasm.

Basically,cell is of two type one in prokaryotic and another one is eukaryotic. The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.

The unicellular animals are made up of single cell and all the functions carried out in a single cell like amoeba and multicellular organisms are made up of multiple cells and there is specific cell for specific functions.

Therefore,The statement which is not true is it needs a vesicle to move the matter. Thus, option C is correct.

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Answer:C is wrong exocytosis only needs a transport protein and atp

Explanation:

Spoon-shaped, quill-shaped, spider-like, and thread-like flowers all describe varieties of A. gerbera.
B. daffodils.
C. chrysanthemums.
D. lisianthus.

Answers

Spoon-shaped, quill-shaped, spider-like, and thread-like flowers all describe varieties of chrysanthemums.

A cross-section of a tree trunk shows 20 dark-colored rings and 20 light-colored rings. What is the likely age of this tree?

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Trees produce 2 colored rings per year and so by counting these rings you can have an idea as to how long the tree has lived. With 20 dark-colored rings and 20 light-colored rings, the tree is likely to have stood up for 20 years. I hope this helps.

The likely age of a tree that shows 20 light colored rings, and 20 dark colored rings is 20 years old. Each year of a tree's life is represented by a dark and a light part. The type of life that a tree has had can also be learned by looking at the rings. If rings are not even or concentric you can tell that a tree was leaning, or was growing in a windy area. You can also judge the health of a tree by how the rings are spaced.

To determine whether two organisms are related, scientists may compare the _____ of their cells.

Answers

Scientists may compare the DNA of the cells.

Sexual reproductiononly requires one parent

produces an exact copy of the parent organism

requires the sperm and egg cells

is the same as mitosis

Answers

Best answer Sexual Reproduction... requires the sperm and egg cells.

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