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3 years ago

Describe how finches of the Galapagos Islands adapted over time.

Biology

1 answer:

konstantin123 [22]3 years ago

8 0

Answer:

Darwin observed the Galapagos finches had a graded series of beak sizes and shapes and predicted these species were modified from one original mainland species.

Darwin called differences among species natural selection, which is caused by the inheritance of traits, competition between individuals, and the variation of traits.

Offspring with inherited characteristics that allow them to best compete will survive and have more offspring than those individuals with variations that are less able to compete.

Large-billed finches feed more efficiently on large, hard seeds, whereas smaller billed finches feed more efficiently on small, soft seeds.

When small, soft seeds become rare, large-billed finches will survive better, and there will be more larger-billed birds in the following generation; when large, hard seeds become rare, the opposite will occur.

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Seismographs rely heavily on a pendulum (free-swinging weight) to record measurements. How do you think using a pendulum helps d

MaRussiya [10]

Answer:

Generally, a seismograph consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. The motion of the base with respect to the mass is commonly transformed into an electrical voltage. The electrical voltage is recorded on paper, magnetic tape, or another recording medium.

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2 years ago

Contrast the two types of plant reproduction. Help me please its due today

AysviL [449]

Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from the parent(s). Asexual reproduction produces new individuals without the fusion of gametes, genetically indentical to the parent plants and each other, when mutations occur

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2 years ago

During platelet plug formation, platelets begin to stick to:.

sashaice [31]

Answer:

During platelet plug formation, platelets begin to stick to: collagen with the assistance of von Willebrand factor. As a platelet plug forms at an injury site platelets become activated and their cytoplasm: degranulates as they release chemicals such as ADP and thromboxane A2.

Explanation:

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2 years ago

In a population of 100 four o’clock plants, there are 50 red-flowered plants with genotype CRCR, 30 pink-flowered plants with ge

Misha Larkins [42]

Answer:

a- CRCR frequency = 0.5

b- CRCW frequency = 0.3

c- CWCW frequency = 0.2

d- CR frequency = 0.65

e- CW frequency = 0.35

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Download pdf

3 0

3 years ago

Explain Gynecomastia in males.

PolarNik [594]

Gynecomastia is an increase in the size of the mammary gland in men. The condition can occur in one or both breasts. It starts as a small mass under the nipple, which can be sensitive. One breast can be bigger than the other. Its cause is an imbalance between the stimulatory effects of estrogen (female sex hormones) and the inhibitory effects of androgens (male sex hormones) in the breast tissue, when the first ones increase, or the second ones descend.

Gynecomastia is a problem relatively common in the population, and there are three prevalence peaks throughout life:

Newborns: Between 60 and 90% of newborns have gynecomastia, produced by the passage of maternal estrogens through the placenta. It is a transient gynecomastia that disappears in about 2-3 weeks.

Puberty: Gynecomastia in puberty affects mainly young people aged between 10 and 14 years, and is due to the transient and physiological increase in estrogen that occurs at this age.

Elderly: Is due to an increase in fatty tissue with a greater peripheral aromatization ( a process that occurs in adipose tissue and that involves the conversion of androgens into estrogens), a decrease in the production of testosterone by the testes and the use of drugs.

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3 years ago