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TEA [102]
3 years ago
7

What are the three main groups of rocks and how are they formed

Biology
1 answer:
mariarad [96]3 years ago
6 0
The main three groups of rocks are metamorphic, sedimentary, and igneous. Igneous rocks are formed from melted lava and volcanic ashes. Metamorphic is a mixture of sedimentary and igneous and sedimentary are formed at or near the eat the surface by accumulation of sediment.
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What would happen if one of the chromosomes in a homologous pair failed to separate from its homologue at the end of metaphase I
Zepler [3.9K]

The correct answer is: daughter cells will have abnormal chromosome numbers and this condition is called aneuploidy.

Nondisjunction is the failure of homologous chromosomes (or sister chromatids) to separate during the process of cell division and consequently lead to aneuploidy. There are three forms of nondisjunction:  

• Nondisjunction in meiosis I (pair of homologous chromosomes unable to separate in meiosis I),  

• Nondisjunction in meiosis I (sister chromatids unable to separate during meiosis II), and

•  Nondisjunction in mitosis (failure of sister chromatids to separate during mitosis)


4 0
3 years ago
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What does it mean if somebody has a lump under their testes?
quester [9]
Answer is

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Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of
larisa86 [58]

Answer:

The correct answer will be option-D

Explanation:

The aerotaxis movement experiment performed by the Theodor W. Engelmann played an important role in understanding the photosynthesis.

The experiment was performed on the <em>Spirogyra </em>filamentous algae which were exposed to a different wavelength of light.

The other aerobic bacteria present in the test tubes started moving and accumulated near the two regions of the <em>Spirogyra</em> where they were exposed to the blue and red light of the VIBGYOR.

The region receiving red and blue light produced more oxygen through photosynthesis which indicated that these two wavelengths of the light are more active for photosynthesis than any other wavelengths.

Thus, option-D is the correct answer.

7 0
3 years ago
Freshwater fish need water near pH7.these fish prefer
mash [69]

A. Neutral water

Less than 7 is acidic (which has 6 letters, 6< 7)

More than 7 is alkaline (which has more than 7 letters). Alkaline = basic

7 is neutral

3 0
3 years ago
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Lina20 [59]
The answer would be A

Because

The sense of smell is part of our chemical sensing system, or the chemosenses. Sensory cells in our nose, mouth, and throat have a role in helping us interpret smells, as well as taste flavors. Microscopic molecules released by the substances around us (foods, flowers, etc.) stimulate these sensory cells. Once the cells detect the molecules they send messages to our brains, where we identify the smell. Olfactory, or smell nerve cells, are stimulated by the odors around us--the fragrance of a gardenia or the smell of bread baking. These nerve cells are found in a small patch of tissue high inside the nose, and they connect directly to the brain. Our sense of smell is also influenced by something called the common chemical sense. This sense involves nerve endings in our eyes, nose, mouth, and throat, especially those on moist surfaces. Beyond smell and taste, these nerve endings help us sense the feelings stimulated by different substances, such as the eye-watering potency of an onion or the refreshing cool of peppermint.
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