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2 years ago

The final process in production of sperm, yielding cells with small heads and long tails, is called ________.

2 answers:

7 0

Production of the mature sperm cells have 4 step process beginning at puberty and throughout the male's lifetime. Spermiogenesis is the final process for production of sperm where the spermatids mature into motile spermatozoa. For humans, the spermatogenesis takes 74 days to 120 days and if the transport on the ductal system is included it would take 3 months.

klasskru [66]2 years ago

4 0

Answer: Spermiogenesis

The final stage of spermatogenesis or production of sperm is called spermiogenesis. It is the stage where spermatids differentiate into mature, motile spermatozoa.

This composed of four stages: first is the golgi phase where the spermatids start to form a head and its DNA packaging are condensed. Second, the formation of acrosomal cap in cap phase. Third phase is Acrosomal phase, one of the centrioles of the spermatid elongates and become tail and the fourth phase is maturation phase where the remaining cytoplasm and organelles are removed.

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1. Melissa raises crickets at her pet store that she

harkovskaia [24]

Answer:

a. Manipulated variable: TEMPERATURE

b. Responding variable: CRICKET CHIRP

c. Controlled variable: Same species of cricket

d. Hypothesis: IF the temperature is increased, THEN crickets will chirp more

Explanation:

Independent variable, also called the manipulated variable, is the variable that is changed or manipulated in an experiment. In this case, the independent variable is the TEMPERATURE.

Dependent or responding variable is the variable that responds to changes made to the independent variable. The dependent variable in this case is CHIRP OF THE CRICKETS.

Controlled variable is the variable that must be kept unchanged for all groups throughout the experiment. The controlled variable in this case is SAME SPECIES CRICKET USED.

Hypothesis is a testable explanation (via experimentation) to an observed problem or a given question. In this investigation involving Melissa, an hypothesis is: IF the temperature is increased, THEN crickets will chirp more.

3 0

3 years ago

what percentage of the energy flowing through primary producers is ultimately transferred to secondary consumers?

Finger [1]

Energy transfer is the transmission of food energy from organism to the next which is illustrated as the food chain. Normally and typically, the autotrophs are the photosynthetic organisms that primary makes food for itself and for other organisms. Hypothetically, we can assume that about 6000 kilocalories per square meter per year these autotrophs can collect and store energy. Primary consumers like omnivores such as deer, cow, birds and etc. receive almost 10% as much from these autotrophs. Secondary consumers receive for as much as 1% of the total energy that was from the autotrophs.

6 0

2 years ago

SCIENCE QUSTION!!!

pishuonlain [190]

Answer:

2/4 or 50%

Explanation:

f. f

F. Ff. Ff

f. ff. ff

Ff=2/4, 50%

ff= 2/4, 50%

3 0

3 years ago

In a cladogram, when does a group of organisms branch off?

Illusion [34]

Answer:

A cladogram is a visual representation of the relationships between organisms and also shows how organisms evolved from common ancestors. Points where organisms branch off are called nodes and these nodes branch off show the last common ancestor among the organisms.After each node, the line moves forward, which indicates where the organisms diverge. This means at this point, the organisms evolved traits that separates them from the common ancestor.

4 0

3 years ago

What ratio (dominant:recessive) will you always get when two hybrid organisms are crossed?

madam [21]

Answer: C) 3:1

Explanation: A hybrid generally is an organism of a mixed origin or an organism with a combination of two or more different traits. In genetics, a hybrid can be referred to as an organism with two different alleles for a particular trait, that is, an organism that is heterozygous for a trait.

When two hybrid organisms are crossed, the offsprings produced are one homozygous dominant, two heterozygous dominant and one homozygous recessive offsprings. Homozygous dominant and heterozygous dominant offsprings will manifest as dominant.

For example when two hybrid tall plants with Tt genotype are crossed the resulting offsprings are one TT (homozygous tall), two Tt (heterozygous tall) and one tt (recessive short) plants. One homozygous tall and two heterozygous tall plants are dominant while one short plant is recessive, thus giving the ratio of dominant to recessive as 3:1.

3 0

3 years ago