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emmainna [20.7K]
2 years ago
5

What is the first step in a scientific investigation?

Biology
2 answers:
zimovet [89]2 years ago
8 0

Answer: I think a because without asking question how are u gonna know what u gonna do? Then u do reserch of the question and the c and final and b

Explanation:

harina [27]2 years ago
5 0

Answer:

a.asking questions. .......

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Audrey woke up and decided to go to the bakery for breakfast. When she walked through the door, the smell of blueberry muffins c
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<em>Sensory neurons</em> detected the smell of muffins.

Explanation:

Sensory neurons can be described as a group of neurons which convert stimulus from the external environment of the organism into an electrical impulse. Sensory neurons are also known as afferent neurons. there are different types of sensory neurons to detect different types of environmental stimuli. The sensory neurons which are used for smelling are termed as olfactory sensory neurons. Hence, the sensory neurons helped Audrey to detect the smell of muffins.

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It will spontaneously decay into other stable elements
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Why are iron meteorites the core of asteroids?
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They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.

Explanation:

Hope this helps luv

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2 years ago
A change that increases an organism's chances of survival is called a(n) _____.
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2 years ago
Why cycus are called conifer? give its 3major characteristics features​
Licemer1 [7]

Answer:

Cycads /ˈsaɪkædz/ are seed plants that typically have a stout and woody (ligneous) trunk with a crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, therefore the individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters to several meters tall. They typically grow very slowly[3] and live very long, with some specimens known to be as much as 1,000 years old.[citation needed] Because of their superficial resemblance, they are sometimes mistaken for palms or ferns, but they are not closely related to either group.

Cycads are gymnosperms (naked seeded), meaning their unfertilized seeds are open to the air to be directly fertilized by pollination, as contrasted with angiosperms, which have enclosed seeds with more complex fertilization arrangements. Cycads have very specialized pollinators, usually a specific species of beetle. Both male and female cycads bear cones (strobili), somewhat similar to conifer cones.

Cycads have been reported to fix nitrogen in association with various cyanobacteria living in the roots (the "coralloid" roots).[4] These photosynthetic bacteria produce a neurotoxin called BMAA that is found in the seeds of cycads. This neurotoxin may enter a human food chain as the cycad seeds may be eaten directly as a source of flour by humans or by wild or feral animals such as bats, and humans may eat these animals. It is hypothesized that this is a source of some neurological diseases in humans.[5][6]

Cycads all over the world are in decline, with four species on the brink of extinction and seven species having fewer than 100 plants left in the wild.[7] The plant has a very long fossil history, with evidence that they existed in greater abundance and in greater diversity before the Jurassic and late Triassic mass extinction events.

Explanation:

~Dr.Smiley~

(Jane)

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2 years ago
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