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dybincka [34]
2 years ago
8

Which statement is true about the male reproductive system? The testes produce semen. Sperm cells are the largest component in t

he composition of semen. The scrotum functions to keep the testes at an optimum temperature. The penis enables sperm to be deposited directly into the uterus.
Biology
2 answers:
zheka24 [161]2 years ago
6 0
The scrotum functions to keep the testes at an optimum temperature
labwork [276]2 years ago
3 0

Answer:

The scrotum functions to keep the testes at an optimum temperature.

Explanation:

Sperm formation occurs in seminiferous tubules of testes. Semen is a mixture of secretions of male accessory glands and sperms. The scrotum is the pouch of skin and testes descends to them during embryonic development. This is done to provide lower temperature as required for sperm formation.

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What are the three lifestyle changes that give positive impact on environment?​
Ray Of Light [21]

Answer:

please give me brain list and follow

Explanation:

Other medium-impact behaviors would include recycling, eating local, improving home energy efficiency such as heating and cooling, and eating less meat. Low-impact behaviors include conserving water, buying products with less packaging, composting, purchasing carbon offsets, and using public transportation.

3 0
2 years ago
Describe how the functional units for beta carotene, xanthophyll, chlorophyll a, and chlorophyll b are different. be sure to ide
leonid [27]

The pigments have a similar structure of 40 carbon atoms covalently bonded in a chain. Carotenoids contain oxygen atoms in their chemical structure (retinyl functional group) while xanthophyll does not. This makes carotenoids more non-polar compared to xanthophylls, hence move farthest in chromatography paper using a nonpolar mobile phase. Chlorophyll pigment, on the other hand, has chlorin rings (which are larger) as functional units hence move slowly in chromatography.

Photosynthetic rates can be measured by either the amount of oxygen they consume per particular time period or the amount of carbon dioxide produced per particular time period. This is conducted while immersed in water so as to measure bubble rate formation in case of oxygen production or the change in water pH in the case of carbon dioxide consumption.

When autumn approaches, the amount sunlight received by the plant is reduced due to longer night than days. Deciduous trees have adapted by losing chlorophyll a and b pigments (most important in photosynthesis) during this time. This leaves a higher amount of the other red and yellow pigments hence making the leaves change from green to yellow-red.

It is believed that this is the result of an ancient endosymbiotic relationship between a protist and a eukaryotic cell. The protist generates energy that the eukaryotic can utilize in its growth and reproduction while the protist is sheltered. This relationship became obligatory symbiosis over time.






8 0
2 years ago
What processes are involved in getting a tan and then having it fade away?​
vesna_86 [32]

Answer:

To understand the tanning process one first needs to realize that the skin is comprised of several different types of cells. Each type of cell has a specific function. The cells involved primarily in the tanning process are called melanocytes. Melanocytes are located at the base of the epidermis between the epidermis and the dermis below. Melanocytes use the amino acid tyrosine to produce melanin. This melanin leaves the melanocytes and travels up through the epidermis where it reacts with the UVA and UVB radiation through a chemical reaction darkening the pigmentation of the skin. As we already know the skin consists of three layers of tissue: The epidermis or outer layer, the dermis or inner layer and the subcutaneous layer

Explanation:

To understand the tanning process one first needs to realize that the skin is comprised of several different types of cells. Each type of cell has a specific function. The cells involved primarily in the tanning process are called melanocytes. Melanocytes are located at the base of the epidermis between the epidermis and the dermis below. Melanocytes use the amino acid tyrosine to produce melanin. This melanin leaves the melanocytes and travels up through the epidermis where it reacts with the UVA and UVB radiation through a chemical reaction darkening the pigmentation of the skin. As we already know the skin consists of three layers of tissue: The epidermis or outer layer, the dermis or inner layer and the subcutaneous layer

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2 years ago
The number of chromosomes in each cell goes from diploid to haploid after what phase
vitfil [10]
During Meiosis Phase I the number of chromosomes in each cell goes from diploid to haploid.
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Define the term 'indigenous breed'​
Artemon [7]

Things that belong to the country where they were found, rather than coming there or being brought there from another country.

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