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ziro4ka [17]
4 years ago
15

Fill in the blanks:

Biology
1 answer:
Irina-Kira [14]4 years ago
8 0

Answer:

1. Vestigial

2. Homologous

Explanation:

During evolution, some structures become nonfunctional in the organisms. These structures were otherwise working in their ancestors. These structures are called vestigial organs. Example: appendix in humans.  

Homologous organs are the organs present in the organisms of different species and have the same basic structure. These species are supposed to have shared a common ancestor during their evolution. Therefore, they have organs with the same basic structures but are modified to perform different functions. For example, wings of bat and arm of humans have the same skeletal structure.

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Comparing and Contrasting Earth and Moon Orbits
Paha777 [63]

Answer:

\begin{array}{lcl}Earth's \ Orbit&&Moon's \ Orbit\\Travels \ around \ the \   Sun &&Travels \ around \ Earth\\Takes \ 365.25 \ days&&Takes \ 27.3 \ days \end{array}\right]

Explanation:

The Earth is a planet which is a tern used to describe large bodies that revolves around a star.

The star around which the Earth revolves or travels around is the Sun, and the path of the Earth's motion is known as the Earth's orbit. The time it takes the Earth to travel round the Sun is 365 1/4 (365.25) days

The Moon is a natural satellite of the Earth, therefore, the Moon travels or revolves round the Earth. The Moon is about 27% the size of the Earth and it takes the Moon about 27.3 days to travel around the Earth.

3 0
3 years ago
Consider this reaction: HCO3− + H2S → H2CO3 + HS−
Kaylis [27]

Answer: The correct option is HCO_3^-

Explanation:

According to the Bronsted Lowry conjugate acid-base pair, an acid is a substance that donates protons and a base is a substance that accepts protons.

From the given options, HCO_3^- represents a Brønsted Lowry base as it is accepting H^+ and H_2S  represents a Brønsted Lowry acid as it is donating H^+.

HCO_3^-+H^+\rightleftharpoons H_2CO_3

H_2S\rightleftharpoons HS^-+H^+

4 0
4 years ago
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Please help me! I don't get it I'm stuck. Draw a food web representing the flow of energy in the ecosystem. Be sure to include a
Llana [10]

Answer:

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5 0
3 years ago
Which kind of rock is most likely to contain a trilobite fossil?
egoroff_w [7]

Answer:

Sandstone

Sandstone contains fossils of creatures such as trilobites, brachiopods, crustaceans, bryozoans and plants. Remains of land animals like mastodons and dinosaurs are much more likely to be found in sandstone.

Explanation:

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