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Vika [28.1K]
3 years ago
12

Do Caribou fight to attract females?

Biology
2 answers:
andrey2020 [161]3 years ago
5 0
Yes, for dominance and to win the female
Contact [7]3 years ago
3 0
Yes because who ever wins gets the girl
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If a cell has a diploid number of 8 (2n = 8) before meiosis, how many chromosomes will be in each of the four daughter cells aft
Naddik [55]

Answer:

The final product is four gametes, two of them with 5 chromosomes, and the other two with 3 chromosomes each.

Explanation:

If nondisjunction occurs during meiosis 1, a pair of homologous chromosomes fail to separate, and one of the daughter cells will have the two chromosomes while the other cell will not get any chromosome from the pair.

If meiosis 1 occurs normally, but nondisjunction occurs in meiosis 2, sister chromatids fail to separate.  

The usual process of meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.  

If the diploid number of the original cell is 8 (2n=8), then under normal conditions, each haploid daughter cell should have 4 chromosomes (n = 4).  

But in the exposed example, one pair of homologous chromosomes experiences nondisjunction during meiosis I (in the attached file, you will recognize this pair as the red one). The other chromosomes separate as usual. So one of the daughter cells will have one extra chromosome than expected (five instead of four), and the other daughter cell will lack one chromosome (three instead of four). Meiosis II occurs normally. The final result is the formation of four gametes, two of them with 5 chromosomes, and the other two with 3 chromosomes each.

6 0
2 years ago
What is substrate-level phosphorylation?
Lunna [17]

Answer:

D --  ATP synthesis when the phosphate donor is a substrate with high phosphoryl transfer potential

Explanation:

Substrate- level phosphorylation is the synthesis of ATP from ADP by the transfer of phosphoryl group from a substrate with high phosphoryl group potential to the ADP molecule.

In substrate-level phosphorylation, the donor is a phosphorylated intermediate molecule with a high phosphate transfer potential and it is a way through which phosphate in introduced into a molecule, the other two ways are oxidative phosphorylation and photophosphorylation. In substrate-level phosphorylation, a PO4^2- is transferred from a phosphate intermediate (substrate) to ADP to form ATP. Phosphorylase and kinases are enzymes involved in this reaction. An example is the reaction in glycolysis which involves phosphoenolpyruvate and ADP to form Pyruvate and ATP. This is to ensure adequate supply of energy to cells and also during anoxia so as not to make mitochodria strain the glycolytic ATP reserves.

7 0
3 years ago
What of the following is found on an animal cell ,but not in a plant cell?
iren [92.7K]
Cell structures that are in plant cells are cell walls, central vacuole, and chloroplast.  
6 0
3 years ago
Class reptilia and class amphibia share many traits. Name these shared traits
spin [16.1K]

Answer:

Explanation:

Amphibians are group of animals that live a double life; one in water with gills and the other on land with lungs (at maturity). They include frogs, newts, salamanders etc.

Reptiles ( meaning to creep under shadow of darkness) are group of animals that possess scales. They include snakes, crocodiles, lizards etc.

Reptiles and amphibians are distantly related but share some traits including:

1. They are both poikilothermic (cold-blooded) animals i.e. their body temperature is dependent on that of the environment's.

2. They both lay eggs externally, although that of amphibians is fertilized after being layed

3. They both possess lungs for gaseous exchange, although, amphibians use gills in water.

4. Both reptiles and amphibians belongs to Chordata i.e. they both possess a vertebrae column (backbone)

5. Most reptiles and amphibians make use of the same defensive and attacking traits as a pretty and predator respectively. They employ camouflage, biting and inflating of their body size.

7 0
3 years ago
Passive transport defination
max2010maxim [7]

The movement of substances (as by diffusion) across a cell membrane without the expenditure of energy.

3 0
3 years ago
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