How does the teeth of afarensis compare to the teeth of the modern human?

1 answer:

7 0

They were similar to modern humans in that they were bipedal (that is, they walked on two legs), but, like apes, they had small brains. Their canine teeth were smaller than those found in apes, and their cheek teeth were larger than those of modern humans.

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Which of the following is an example of sensors working during homeostasis?

Keith_Richards [23]

D) energy demands triggering a release of glucose.

Notice how the stimulant (low energy supply) triggers a restoration (normalizing) of a normal balance, which in this case is increasing energy supplied (glucose).
This process is called "homeostasis," or maintaining an internal balance.

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2 years ago

During the winter, this species of hare has white fur, but in the summer, it has brown fur. What environmental change may have l

aivan3 [116]

Answer:

Snow cover

Explanation:

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2 years ago

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A person with darker skin produces more what ?

Brilliant_brown [7]

A person with darker skin produces more melanin. Those are the dark brown pigments that come from your skin, hair, or eye color.

Hope that helps. -UF aka Nadia

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2 years ago

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Which of the reactions of photosynthesis require pigments absorbing solar energy?

ss7ja [257]

Answer:

During photosynthesis, a green pigment called chlorophyll is required to absorb solar energy. The reaction in photosynthesis that requires pigments to absorb solar energy is called LIGHT REACTION.

Explanation:

Light reaction is considered to be the first stage or phase during photosynthesis and the key elements that is needed for the reaction to take place is- sunlight and chlorophyll. Chlorophyll is a pigment that makes the leaves of the plant appear green. There is also another important function of chlorophyll that is to trap solar energy during the process of photosynthesis to convert the trapped solar energy into chemical energy- ATP molecules. These ATP molecules then form glucose- food for the plant.

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3 years ago

Plz help ASAP! THANK YOU

marysya [2.9K]

Answer:

According to the diagram, what is occurring in step 7 is cytokinesis, with the separation of two daughter cells, following cell division.

Explanation:

Cytokinesis is a process that occurs at the end of mitosis or meiosis, being the final step of cell division. This mechanism allows the separation of the two daughter cells, with equal distribution of cytoplasm and formation of cell membrane, differentiating into two independent cells.

In the diagram it can be observed (step 7) that after the division process —in yellow— two arrows pointing to two cells are evident, which implies the process of cytokinesis.

Prior to the cytokinesis process, karyokinesis occurs, which is the separation of nuclei and formation of the nuclear membrane.

In animal cells, karyocinesis occurs by the effect of a ring of actin and myosin that helps to force the separation. In the plant cell, the fragmoplast is formed, a septum that induces the separation of the daughter cells.

The other options are not correct because:

Cell growth occurs in G1 phase.
Cell preparation occurs in interphase.
DNA replication occurs in S phase.
Mitosis is represented in yellow, and involves 4 phases.

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2 years ago