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PIT_PIT [208]
3 years ago
13

At the end of which period on the geological time scale did the dinosaurs become extinct? A. Jurassic B. Quaternary C. Cretaceou

s D. Tertiary
Biology
2 answers:
matrenka [14]3 years ago
7 0
<span>Hey, Rockstar2405!The dinosaurs become extinct in the Cretaceous Period. I <span>hope this helps;)</span></span>
pychu [463]3 years ago
5 0
(C. The dinosaurs became extinct after the Cretaceous time period, after living on Earth for about 165 Million Years
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Distinguish between:<br> Bat and Dove​
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Answer and Explanation:

Bats are mammals of the order Chiroptera. With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more manoeuvrable than birds, flying with their very long spread-out digits covered with a thin membrane or patagium.

Their wings skeleton have the shape of finger/hands like a human.

Doves are the only family in the order Columbiformes. These are stout-bodied birds with short necks, and short slender bills that in some species feature fleshy ceres. They primarily feed on seeds, fruits, and plants.

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3 years ago
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Which are examples of negative feedback? Select three options. a child whose thymus gland is building an immune system that gets
dimaraw [331]

Answer:

I believe #3, 4, & 5 is your answer.

Explanation:

-When someone's pancreas stops producing the hormone that lowers blood sugar because the  person hasn't eaten recently.

-When someone's pancreas hormone increases every time they eat, but decreases when they aren't eating.                                                                                

-When a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones.

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3 years ago
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Match the following.
iris [78.8K]
<span>AUTOTROPH 1. an organism that can make its own food

Plants like algae are autotrophs. They produce their own food with the use of light, carbon dioxide, water, and other chemicals that are vital in their food producing activity. Aside from plants, there are autotroph organisms. An example of this is phytoplanktons. 

CALVIN CYCLE 2. the dark reaction process of photosynthesis that uses carbon dioxide for the synthesis of carbohydrates

The Calvin Cycle has three phases. These are 1) carbon fixation, 2) reduction reactions, and 3) RuBP regeneration. 
This cycle occurs in the stroma of the chloroplast and it converts carbon dioxide and other chemical compounds into glucose.

CAROTENOID PIGMENT 3. a pigment ranging in color from yellow to red; helpful in capturing the Sun's light energy for use in photosynthesis

Carotenoid is a plant pigment. It produces yellow, orange, and red colors of many fruits and vegetables. Carotenoid pigment is identified as a class of phytonutrients that benefits human health. People who consumes carotenoid rich fruits and vegetables enjoys the antioxidant property of the food as well as the Vitamin A that some carotenoid convert into. 

CHLOROPHYLL 4. a green pigment in plants that serves to trap the Sun's energy for photosynthesis

Chlorophyll is the combination of two Greek words "chloros" and "phyllon" which means green and leaf respectively. This pigment also contributes to human wellness as consumption of plants rich in chlorophyll are proven to be very healthy. These health benefits are 1) helps fight cancer, 2) improves liver detoxification, 3) speeds up the healing of wounds, 4) improves digestion and helps control weight, and 5) protects skin from skin virus like cold sores.

CHLOROPLAST 5. the tiny body that contains chlorophyll; part of the cell in which photosynthesis takes place

Chloroplast is a type of plastid that can be distinguished from other plastids due to its green color. Chloroplast is the only plastid that contains chlorophylls a and b, thus its green color. 

PHOTOSYNTHESIS 6. a process that involves the use of carbon dioxide and water in the production of glucose and oxygen using the Sun's energy

RADIATION 7. transfer of heat or energy through rays of various wavelengths

</span><span>Radiation is defined as energy travelling through space. Sunshine or sunlight is an example of radiation. Its ultra violet rays radiates heat on the earths' surface which in turn helps our autotrophs undergo photosynthesis.
</span>
3 0
3 years ago
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In the late 1980s, however, unusually warm weather caused many of the pools that the toads used as breeding areas to dry up. By
Sav [38]

the answer is B.extinction can be related to a failure to adapt to changes in the environment.

4 0
3 years ago
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Which biome has the least precipitation?
Korvikt [17]

Answer: Option C.

Tundra

Explanation:

Tundra is a biome that has low Precipitation. Precipitation is a form of water that fall from the atmosphere to the Earth surface. Which could be inform of snow, sleet e.t.c.

Tundra is the coldest of all types of biomes. It has low temperature, little precipitation,low nutrients. It is located near the north Pole of the Earth. It is characterized by permafrost, permanent frozen layer on its surface.

6 0
3 years ago
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