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mrs_skeptik [129]
3 years ago
7

A pioneer species is...

Biology
1 answer:
ivanzaharov [21]3 years ago
4 0

Answer:

b

Explanation:

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Your neighbor has accidentally swallowed some pesticide. he is conscious and alert. what should you do?
Llana [10]
Ask him his current state in his opinion and call the ambulance.
I hope this helps!
4 0
3 years ago
Which of the following features did whales possibly inherit from a four-legged ancestor?
pishuonlain [190]

Answer:

2. Hip bones

Explanation:

More than 40 million years ago, whales had ancestors who walked on land. Even now, they have a feature they inherited from them - hip bones. Scientists used to think that they are vestigial, i.e. that they lost their function. However, recently they discovered that these bones help whales (and other marine mammals who have them, such as dolphins) maneuver better mating.

Whales developed the rest of the listed features later, when they became marine animals. This is why they are incorrect.

8 0
3 years ago
Which describes the 23 pairs of human chromosomes?
Zigmanuir [339]

Answer:

option B

Explanation:

there are 22 pair of autosome and 2 pair of sex chromosome

3 0
3 years ago
A neurotransmitter may have an excitatory or an inhibitory effect on the postsynaptic cell, depending on __________.
Otrada [13]

A neurotransmitter can have an excitatory or inhibitory effect on the postsynaptic cell, depending on <u>which of its </u><u>receptor(s</u><u>) are present on the </u><u>postsynaptic</u><u> (target) cell.</u>

<h3>How do excitatory and inhibitory neurotransmitters act?</h3>

Sometimes neurotransmitters can bind to receptors and cause an electrical signal to be transmitted through the cell (excitatory). In other cases, the neurotransmitter can prevent the signal from continuing, preventing the message from being carried (inhibitory).

With this information, we can conclude that a neurotransmitter is a signaling molecule secreted by a neuron to affect another cell across a synapse.

Learn more about neurotransmitter in brainly.com/question/9725469

#SPJ1

6 0
2 years ago
How are adaptations related to natural selection?
kolbaska11 [484]
I thinks it’s D but not sure
8 0
3 years ago
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