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Dmitry [639]
2 years ago
13

Gentoo penguins present a potential mate with a pebble. Emperor penguins have a specific call and movement that they make to att

ract a mate. Which type of isolation do these penguins demonstrate?
temporal isolation
behavioral isolation
geographical isolation
anatomical isolation
Biology
1 answer:
lukranit [14]2 years ago
7 0

Answer:

correct answer is B

Explanation:

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What organization certifies products based upon their biodynamic production techniques
Rasek [7]

Answer:

Demeter International

Explanation:

Demeter International is the primary certification agency for farms and gardens using the methods. In the United States, bio-dynamic farming dates from 1926.-

5 0
3 years ago
In a piece of hemoglobin beta chain,how might u look to see an mrna in Ecoli?
hodyreva [135]

Answer:

Hemoglobin is responsible for binding and transporting oxygen in the body. It is a tetrameric protein that is found in high concentration in red blood cells (erythrocytes, red blood cells). Each hemoglobin molecule is made up of four subunits: two of the alpha type and two of the beta type, and each subunit can bind an oxygen molecule through its heme group.

Structure studies have shown that hemoglobin can adopt two conformations, called T (tense) and R (relaxed). Deoxyhemoglobin (in blue) is in state T, and the union of oxygen (in red) causes the transition to state R. The animation shows a close view of the heme group (in white, balls and rods) of one of the subunits of hemoglobin. In the deoxygenated state (T), the iron atom is not coplanar with the rest of the heme group due to its association with the histidine side chain. The union of oxygen displaces the iron atom so that it remains coplanar with the rest of the heme group, which in turn drags histidine, producing a larger-scale conformational change that affects the entire protein.

Hemoglobin can be considered as a tetramer formed by two alpha-beta dimers. The conformational change associated with the transition from T to R mainly affects the relative position of these two dimers (rather than the interactions between the alpha and beta subunits within a dimer). This is illustrated in the last stretch of the animation (drawn in black and white).

5 0
3 years ago
anxiety is the actual experience of apprehension and uncontrolled arousal and ______ anxiety is a personality characteristic, wh
Kipish [7]

Answer:

<u>State</u> anxiety is the actual experience of apprehension and uncontrolled arousal and <u>trait</u> anxiety is a personality characteristic, which represents a latent disposition to perceive situations as threatening.

Explanation:

<u>State anxiety:</u> It is basically a "right now" feeling which changes from moment to moment, manifesting itself as an interruption of an individual's emotion state, leading to a sudden superversion of emotional equilibrium, caused by external factors of current state. e.g An atheletes emotional state at any given time that is variable from situation to situation.

<u>Trait anxiety:</u> It is a personality disposition which is stable over time. e.g An atheletes disposition to interpreting a situation as threatning and responding with an increase in state anxiety.

5 0
3 years ago
Liver and muscle biopsies reveal that glycogen content in the liver is normal but muscle glycogen is elevated. the biochemical s
Luden [163]
What happens is that If the structure is normal, this indicates branching and debranching enzymes are normal. But the reality is that this person must have an issue with a phosphorylase enzyme specific to muscle. One of them could be the one called McArdle's disease which is <span> a metabolic disease affecting </span>skeletal muscle<span> also known as Type V glycogen storage disease.</span>
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madreJ [45]
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