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kicyunya [14]
3 years ago
11

North American Red-winged blackbirds (Agelaius phoeniceus) males arrive at cattail marshes before females each spring. They acti

vely defend areas of the marsh as individual territories. Females choose a territory (and its male) as a place to breed and build a nest. If a male has a high-quality territory, he can form pair bonds with multiple females. Nests are vulnerable to attack from raccoons and other animals. Predation of the eggs and nestlings has a serious impact on reproductive success. Nests that are concealed among the cattails and suspended over water are less vulnerable to predation. Which type of mating system do Red-winged blackbirds have?
Biology
1 answer:
Elina [12.6K]3 years ago
8 0

Answer:

The mating system Red-winged blackbirds have is Territorial Polygyny

Explanation:

Males Red-winged blackbirds arrive before females, select nesting places and defend the territory where 5 to 15 females can establish nesting areas.

Males attract females for nesting by vocalizations and postures, and also having large territories with enough resources for living.

Females accepts the male and his territory and then starts building the nest.

On this type of polygyny, the association between the male and several females occurs on the male`s territory.

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Answer:Cytokinesis in plant cells involves plants using spindle structures called phragmoplasts to carry vesicles of the cell wall material such as cellulose to the new cell plate. ... After the plate divides the plant cells into two daughter cells, the plasma membrane seals off and fully separates the two new cells. During cytokinesis in animal cells, a ring of actin filaments forms at the metaphase plate. The ring contracts, forming a cleavage furrow, which divides the cell in two. In plant cells, Golgi vesicles coalesce at the former metaphase plate, forming a phragmoplast.

Explanation:

8 0
3 years ago
The deep palmar veins drain into the radial and ulnar veins; then those veins, along with the anterior crural interosseous vein,
galina1969 [7]

Answer:

Brachial vein.

Explanation:

Veins may be defined as the blood vessels that carries the blood towards the heart. The main function of the vein is to carry the deoxygenated blood into the heart.

Brachial vein is the deep veins that has the name as their arteries occupy. The brachial veins receive their blood from the palmar veins with the interosseous vein. The brachial veins include the ulnar vein, radial vein in upper limb and lower limb consists of popliteal veins.

Thus, the answer is brachial veins.

3 0
3 years ago
This is just like the last one can anyone help I’m confused?!?
Maksim231197 [3]
D is the Eurasian plate. It has Europe and part of Asia in it.
6 0
3 years ago
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Hypothesize how the chromosomes of the parents would look compared to the chromosomes of their child?
marysya [2.9K]

During fertilization, the encounter of gametes results in the fusion of their nuclei. The nucleus of the egg cell thus formed is therefore a mixture of the two nuclei.

So the parent will only give half of his chromosomes, so the child will have 50% of his chromosomes that resemble each of his parents.

Another factor that must be mentioned is the genetic recombination between the chromosomes that occurs during meiosis of the reproductive cells. Thus, this will give a heterogeneous chromosome resulting from recombination of the two chromosomes of each of its parents, and the child will have a unique combination chromosome but keeping the alleles of both parents.

5 0
3 years ago
Which response to an injection of ACTH indicates a primary adrenal insufficiency
Keith_Richards [23]

Explanation:

Correct Answer: No change in serum glucocorticoid level

Response Feedback:Primary adrenal insufficiency would be indicated when the adrenal cortex fails to produce cortisol when synthetic ACTH is administered. Serum cortisol levelswould increase following ACTH administration if the adrenal cortex is functioning properly. Primary adrenal insufficiency occurs when there is no change in the serum glucocorticoid level.

8 0
4 years ago
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