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3 years ago

How are molecules organized

1 answer:

7 0

An atom consists of a positively-charged nucleus, consisting of various combinations of protons and neutrons, and negatively-charged electrons which move around the nucleus in distribution patterns called shells. In a neutral atom, the number of electrons is equal to the number of protons, but an ionized atom would have more or fewer electrons. Electrons are much less massive than protons or neutrons.

(2) How are groups of atoms organized?
Atoms bond together with other atoms to form molecules or can be part of a crystal lattice. 
hope that helped

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Which of the following correctly compares Ornithischian and Saurischian dinosaurs?

kumpel [21]

Answer:

The option c is partly correct.

Explanation:

None of the statements is completely accurate because:

a. Saurischian dinosaurs include theropod and sauropod dinosaurs, and their common ancestors. Ornithischians comprise neornithischians (ornithopods and ceratopsians), thyreophorans (ankylosaurs and stegosaurs) and heterdontosaurids.

b. Capability to fly has only been documented in fossils belonging to Saurischia (where the birds are also classified in). Feathers, on the other hand, do appear in the two clades. Feathers, however, are not a trait exclusively associated to flight.

c. This is a correct comparison between ornithischians and saurischians in the sense that the attributes do belong to these clades, but when comparing animals there most be a comparison that reflects a pattern. Ornithischians have leaf shaped teeth suited to eat plant material, whereas saurischians have teeth for a carnivore and herbivore diet.

d. Sauropods are saurischians and they evolved herbivory from a meat-eater ancestor.

5 0

2 years ago

What are the forces behind the surface currents known as gyre?

Anuta_ua [19.1K]

Answer:

F) Thermohaline circulation pattern move surface water from equatorial regions to the poles

7 0

3 years ago

How do energetic considerations affect the structure of populations? communities? ecosystems?

alexandr402 [8]

10% rule (efficiency between trophic levels): limits how long an ecosystem's food chain can be
Predator/prey cost benefit analysis (i.e. foraging) -- cost is risk of being eaten or killed along the way, benefit is energy/nourishment obtained: limits distribution of predator v. prey
Immigration/Emigration with other populations and ecosystems
Island biogeography: size of land and distance from another population/ecosystem (mainland): limits population size and variability on island

3 0

3 years ago

Three linked autosomal loci were studied in cucumbers: fruit color (dark vs. light), tendril size (long vs. reduced) and fruitin

Zina [86]

Answer:

Explanation:

1. Progeny observed in the experiment is calculated by adding all the progeny numbers observed in the :

TIME TO FRUIT TENDRIL SIZE FRUIT COLOR NUMBER

Normal normal dark 370

normal normal light 32

early normal light 971

early normal dark 28

early reduced dark 25

early reduced light 483

normal reduced light 36

normal reduced dark 810

TOTAL

PROGENCY 2755

2. The locus in the center is TIME TO FRUIT. Tendril size is at the beginning of the locus and the distance between the locus B and locus C is R2

3 0

3 years ago

!!!!!How do radioactive elements help scientists establish how old rocks and fossils are?!!!!

MAVERICK [17]

Answer:

I will give a hypothesis. Just like a tree, when you cut a tree by its trunk, you will the rings. The rings around it represents the tree's age. So when you cut rock, the pores in the rock determine whether it is an old rock or a fossil rock.

Explanation:

The reason is, if it is limestone and it is an old rock, the pores will be slightly big and if the limestone is a fossil rock, then the pores will be bigger due to leaching or denaturing of the minerals in the rock through the ages.

6 0

2 years ago